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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d92ea3226dc93bf8706da4079cae118c20244481d7b70435d95ff2cfcc1235. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d219372d-8759-4149-b9ed-a94432283d68.json and https://artists.proofprofile.net/proofs/artist/d219372d-8759-4149-b9ed-a94432283d68.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Frank Sinatra, 100-Lecie Urodzin, Koncert W Trójce (Live)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dc707a24487c2b0c6f40d58406c7e8957a17b74acb504cf38a121d4fbfa5c5. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/PLA391711004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1e08de9e5a83ef0b0b87a0f10c42caaa988657c098d3e0350adc84baf756b1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLA391711005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797718c420d5900ef2439470643c3f52bf3bf317808218ebc9e12a7ca9d4c3ef. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/PLA391711006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd918e3418df9011dc39e7ff9fb40f1c2d7ca4c281e60f6d0d904fc42ef8ce555. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLA391711007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd687832c74260e76d19598f92fbdf86c2a5972744aab4037f92b3704fd02dcd2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/PLA391711009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d6c1c14c669c2e9dee89d89d55e8d8b79cf0914250d344f635bff02e92a7d5. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/PLA391711010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c31f82d1de29768f95329d6888d990ae9ab2faa7e9e45c9af08e877096def1f. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/PLA391711011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3de26f4bef8c8e5e0e8af12eaad3ab085c950e8cc80ee0f5285d9b677fb9c8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/PLA391711012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0193312d30fb3ad7ea9336220602fcf1f3b69ac1950dced7c93e67881e754f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/PLA391711014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b08d8d803586b100daebe547ab700790a54167daf1aafd2497fe27f132fc41. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/PLA391711015.
Frank Sinatra, 100-lecie Urodzin, Koncert w Trójce (Live)
Gdy zakocham się / When I Fall in Love - piosenka z filmu „One minute to zero”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7d612202d9bf88e2e9005ce6173222674c58c4ee06fdd717dc628f99018cbc. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/PLA392090024.
Cinema boogie, czyli kino „Uciecha” w Czeladzi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3466c734e589ce96c0be1b501983f2615df0f74940eccb5eaba8e1d16eb3ecfe. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/PLA392090025.
Wyrzeźbiłam Twoją twarz - piosenka z filmu „Małżeństwo z rozsądku”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0195c6a5f573bcefbb89b213a0e2d48c2b499c6375a33a069666f5d399ba736. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/PLA392090026.
Kryminalni - temat z serialu „Kryminalni”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280a12c5abca524a4ea4d31c09b9606247b3b04809e472f47514a0af18a64997. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLA392090027.
Bossa Nova - wokaliza z filmu „Polowanie na muchy”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0af1e665e6547872538eead8ca1706604a4e069a6283b15539f24306d03f291. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/PLA392090028.
Przed nocą i mgłą - piosenka z serialu „07 zgłoś się”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a03a92842283660fc2e7acc3c1504e40e3c5e23b916bd816bb90bac625b1e1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLA392090029.
Samba butelkowa - temat z filmu „Tylko mnie kochaj”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bb04716c4175a418777bfea86c17e5cc9882bace10260148662d764fb426ea. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/PLA392090030.
Deszcze niespokojne - piosenka z serialu „Czterej pancerni i pies”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a639da18799e7ed3c49f6da977ecd3883b8057c203639194249c7e1963d6696. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/PLA392090031.
Zaśnij maleństwo / Rosemary's Lullaby - temat z filmu „Rosemary's Baby”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2811adc3f5c1ac834588d738f5b15b2553384efba20c66a95eeadb9912dbf5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLA392090032.
Wojna domowa - temat z serialu „Wojna domowa”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e537354231d51504ea4adafc535713d96b80767275d8e4dbddd00b420f6c8eb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/PLA392090034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25212cfcf85dfd1e1c06e597dfedf6b595293d7cdc425781e4106a3c571d7e6c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/PLA392090035.