1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f6befe34498b55e78cb8c21ff5debe78b5d5c51b2d76de74218c7a60fe8939. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90f97ab7-0c28-44a6-add6-ba601809adc3.json and https://artists.proofprofile.net/proofs/artist/90f97ab7-0c28-44a6-add6-ba601809adc3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Englisch für die Arbeit A1-B1 (Audiokurs für Wirtschaftsenglisch für Anfänger und leicht Fortgeschrittene)
Inglés nivel pre-intermedio B1_parte 02 (1400 palabras y frases de contexto para aprender y practicar)
Inglés para principantes A1_A2 (2500 palabras y frases de contexto para aprender y practicar)
Capítulo 4.2 - Inglés para principantes A1_A2
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a3096d49983d0506bb8bf0f7f2052cfbe058051013030252cc45b960aa05af. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120225.
Capítulo 4.3 & Capítulo 5.1 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79ad8a5235c5e1d22a991e246f16bbdd2ffd1dfe928e9386a2d8252a9021a5d. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120226.
Capítulo 5.3 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb906cd3cf40c905e51c8a77cf66a95eae02df144dd920601bd4eda9be7fd0bb1. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120228.
Capítulo 5.4 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d30234f5f637cb7a3ad8fee7872dc3db67157037147422d12bda92cf7ce96bc. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:37:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120229.
Capítulo 5.5 & Capítulo 6.1 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6866dd88bd77b4defe60c0fee808394ed8976be009251cbd42265853a0f6fc60. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:01:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120230.
Capítulo 6.2 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587e2251271dfa1bf24e2a76289212d6af61ac703e493a1a081d7dd426a03f60. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120231.
Capítulo 6.3 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fe63a426c89d5e907ab3ac62e397cbaceb02e54f21db0ab8674c0afc00be15. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120232.
Capítulo 6.4 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f884485a340ff929c9e6047bd1eed2e16af9ffb6534c728800cf3dd68ab170. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:00:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120233.
Capítulo 6.5 & Capítulo 7.1 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f22725ec3e4eae84988a155b929f8bc4e1abfb316342f589ae22f89426590a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120234.
Capítulo 7.2 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5176b82b42e2a093d5a524c5c4646b64139377429aef5b6e11ffebb3e9d514b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120235.
Capítulo 7.3 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca980e9d6680527b81f291fdff2dd5f5b068b367e5c5f545f1ed7250f158760. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120236.
Capítulo 7.4 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd50529cad5375164de8326cdfafffb4ac4bb48d6298949c7a045c7092ee9f1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120237.
Capítulo 7.5 & Capítulo 8.1 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6046141ea2d237ffc1e5f6b6907ec6ee581122cb1514e3b73cdff16e2b23d1f2. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120238.
Capítulo 8.2 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa18bc40e044aa39136cb7559f34aab145ce54388acede414a47cfea2c7f7ac3. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120239.
Capítulo 8.3 & Capítulo 9.1 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcb7576939979d073397fd15954b8e2dbd08245cf97eefe6c96398d1cb195ea. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:19:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120240.
Capítulo 9.2 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74495f60f896cab037dcafb545c882fe5948abc8f6b0f85521c35d689d0accf7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120241.
Capítulo 9.3 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bc776e5cfd6de4365979c606e3e00f88b6efe0ab509d5ee38490a494431e50. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120242.
Capítulo 9.4 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef55df5b2e405754b1d274d65b240430fdc0cde9eba441c6e4b70e60cf8c0143. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120243.
Capítulo 9.5 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6b4cb91fec5e2d3d815dfc8f632bc62dbfc84070a0677cd70d139953f88550. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120244.
Capítulo 9.6 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898644544a4845da263dad90e4370ab281a9be29c19bc7a295e898ae245cf5f3. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120245.
Capítulo 9.7 & Capítulo 10.1 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29eab0a7bb7bea33973a5743246cd4c3c8b8fe83162f4251f0b462385c4a1897. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120246.
Capítulo 10.2 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21df38ac275ae1a6bd50757dd5a6e1346522e2e834e8b8f4c291018f65e62835. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:06:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120247.
Capítulo 10.3 & Capítulo 11.1 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0661e2c0d6de73ececd93360a41895700b2800d2ebe3c96444f11f355bc340d7. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:55:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120248.
Capítulo 11.2 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c0ef55bc38d7b0182b1cf421a83699233746ed562182cec7f21c2487b7e394. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120249.
Capítulo 11.4 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c91648579094416031ac02c2d133f9aefd78ff9ffff66bf5c98ba65d9d52c3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120251.
Capítulo 11.5 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140f387598d3554ee8251053f3b08af223cb1986af9f708105421ab946bd2776. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120252.
Capítulo 11.6 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee7c9f4e52a4aced3e8ee4d2188ac931a30d61003a777cd636e9639d25a07ae. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120253.
Capítulo 11.7 & Capítulo 12.1 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a4240fcbf738c5b5359c40fdbe3175b03cd2f7e3079166fb8e93b05efadc96. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120254.
Capítulo 12.6 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9438e662eb1fd5a86fbeeee858b1ac98b57b8dcacd28cd0a69cbe0ba2afddd. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:08:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120259.
Capítulo 13.2 - Inglés para principantes A1_A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc3a81d2dc1dd1a5fc6f34d1aff745cc28574ed81501028a3294a05e870ea16. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80120261.
Inglés nivel pre-intermedio B1_parte 01 (1600 palabras y frases para aprender y practicar)
Capítulo 1 & Capítulo 2.1 - Inglés nivel pre-intermedio B1_parte 01
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d8ee43103577d35953d15cfabd33f740f0d40de8c679e2f71dab3843bdb72a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:48:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80121117.
Inglés nivel intermedio B2 (1 400 palabras y frases de contexto para aprender y practicar)
Capítulo 4.2 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416a82b24b59b12b6970b4e2f18b92a18b9f9970b26eb73a1614e4e81c10ded3. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122658.
Capítulo 5.3 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45f4137b7c446ef3f673a3c5ba139191700416ed133a284d3f67d4357257b05. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122661.
Capítulo 5.4 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0060aa83cd96289d32865a454e305f627f88d53e14ecca8c65f3b522dd2a76d5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122662.
Capítulo 5.5 & Capítulo 6.1 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9180d6b22850adf36d2696ea88e81411fe7c46cb3d202e020eceab2ac167ba7a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122663.
Capítulo 6.2 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa543f1106ed78bb7e21d1db8f09f6ffa5fddac840ceec58bd2df4540d402245. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122664.
Capítulo 6.3 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d1085b56ef538199cf063c2ceb592fbaa1e3906746bda24044de5eb1f7a741. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122665.
Capítulo 6.4 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7869968f25fba82ccc504ded62853bc0324adca403415cfb2fbdcac82e419e40. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122666.
Capítulo 6.5 & Capítulo 7.1 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af6cd5cd7a9ecf8cc1c2521c220407d951e67f5005eb4be1fafe399fcfcd13a. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122667.
Capítulo 7.2 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3632757f6cc385ecc173010da47ff60dc6c430d44dff21259ded9d62ec6fe8a1. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122668.
Capítulo 7.3 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc459e31146ebcf38e34cf9d2ce0dd05e299dbb7c7928659f756a4763e7f1322f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122669.
Capítulo 7.4 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ecd4ea94963b7f4a3e29f23f382e015d39067768ea7779de7a6e8b71d01278. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122670.
Capítulo 7.5 & Capítulo 8.1 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b837cce7699d01544b8bb9c0988433aa1cd9b113d73572f1d126bfffee272c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122671.
Capítulo 8.2 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4ff236381af3d15c926d19658184656893b7c220ab8fb8aead54d8328ae828. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122672.
Capítulo 8.3 & Capítulo 9.1 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffc96d49ccc15dcbc76fbe8c409c7502a46d831b60c212bd4e664a135528e5f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:09:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122673.
Capítulo 9.2 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7af81bcb429f8ba08a483d38a5ee213fe039994a24a8a41b0449b8f90f25363. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122674.
Capítulo 9.3 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd187c11f031b24a6a5739db25fe8d7a600241af38e0a48b3e933bd46991734. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122675.
Capítulo 9.4 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18b928ae7b3a094775f3dc8456def6d3d518ff442a3d50a0ca2618142d5666c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122676.
Capítulo 9.5 & Capítulo 10.1 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298911f92db12ba03e47ecc049fb43c19dc68403f65c607d2a4208d592bce9a8. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122677.
Capítulo 10.2 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2008c7e81f8b1662ced127ae3c79a424564573ad323f2f0453581a772f3aac5. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:29:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122678.
Capítulo 10.3 & Capítulo 11.1 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b984a3a7116a4f49f014f518f64ee4e46797fd7fb028ebf1c63232ba67f6a71. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122679.
Capítulo 11.2 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf252c2795e772eb5858442eee995eb4f8a3d00413ea86cbab69602b646d98112. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:26:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122680.
Capítulo 11.3 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1803ae14d0f1545e7c17f4a8140b219a1e6a8e5b8d5e667c248db89837aaacb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:04:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122681.
Capítulo 12.2 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5b1302208b4fc1da77684997a23b24c8f2ecaafb2d659a9c5ba53593b2a9fa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122684.
Capítulo 12.3 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54249a14b2bf670f17dda4eea04aa3ee08dfa4f94623c3fce56a233dca94713. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:07:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122685.
Capítulo 12.5 & Capítulo 13.1 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c86e5ee2c67a851e3e307f5632bfd329e8d89d7969d34a72cd44e56ae4113b2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:47:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122687.
Capítulo 13.4 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24cc90c1424e65337512a73b284d595d67d8c137a43f3af8cf4e5ae39d60d43. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:17:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122690.
Capítulo 16.2 & Capítulo 17.1 - Inglés nivel intermedio B2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358e257b038285fd0c622635f196e28625f8e0ffa91916dee3ffac0fd5ba382a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ80122696.
Słownictwo angielskie B1_02 (Kurs języka angielskiego dla średniozaawansowanych_część_02)
Słownictwo angielskie A1_A2 (Kurs angielskiego dla początkujących)
Słownictwo angielskie_B1_01 (Kurs języka angielskiego dla średniozaawansowanych_część 01)
Słownictwo angielskie B2 (Kurs języka angielskiego dla zaawansowanych)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c307e679805d01a82175efc696bc41388a719e3bf679d23a1e2f2e77a88fdb5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ89926189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712294f58d7cad2e6496a220122973e3b67ac7ead47c1d365a359d185d464e98. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ89926190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e115a440c2904456f014e154e6c060c390c39a42f9731094faa87eead5d323a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ89926191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a2b76f54cac3e7dff1ccd9485c3548136d5f21499ef73b064540c2df47f8ac. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ89926192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2c96d19e2685b3aff12b4c266029623a29e9edf84a9b6a9e1a3e97785191e2. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ89926193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b19d38dc721b457cb67d4f317c511a57780bc6d00aba70250a224e64d126a3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ89926194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ce348e49267a68f7c39b15eb895bca9f1ef79730453213e0eb7ef90835e5b3. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ89926195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7abe2bac22cd2a3002c287c7e91e1a0c1c18e5f96a22e5b2303a052ac5d4179. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ89926196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39041bd71a63aec0254751d2ad8374bb1d3d0004311b1769bbb9681ad760faab. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ89926197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9eea2e756a521d8e1a047035f201912ab9217a485719e6b70e81924e964daf. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:20:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ89926198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367755ffdcb164d26ae0000c115e40c03359bc4d0d7acbaff625907b37f0cf28. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ89926199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32f12ef1e09e5f1919c9a84a669cb5d936166367f4cd40278e9645e9458c89c. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:23:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ89926200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32690ce7dcc7e03019e72cf3c5e8fda126e995790ee359be4905ca83b640c11. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ89926202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a07f3ae84f75bec41f860525472961d332a1716a5ea1e1eeab64e543adb5d4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ89926204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056f0bbdd065dbfd3b6928c96e6710b0da9b2f434af9374f260a4bcf5be158c2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ89926211.
Angličtina pre pokročilých B2 (Audiokurz angličtiny B2 pre stredne pokročilých a pokročilých)
Angličtina pre mierne pokročilých B1_časť 02 (Audiokurz angličtiny pre mierne pokročilých)
Angličtina pre začiatočníkov A1- A2 (audiokurz angličtiny pre začiatočníkov a mierne pokročilých)
Chapter 01 - Angličtina pre začiatočníkov A1- A2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a776b34881ad0474b191ae45f7e035d409500419607f6a3c62753835149f5a. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1JK2153494.
Angličtina do práce A1_B1 (Poslechový kurz obchodní angličtiny pro začátečníky a mírně pokročilé)
Angličtina na dovolenou A1-B1 (Poslechový kurz angličtiny na cesty a dovolenou pro začátečníky až mírně pokročilé)
Angličtina pro pokročilé B2 (Poslechový kurz angličtiny pro středně pokročilé)
Angličtina pro začátečníky A1_A2 (Poslechový kurz pro začátečníky a mírně pokročilé)
Technická angličtina A1-B1 (Poslechový kurz technické angličtiny pro začátečníky až mírně pokročilé)