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 0x636e492630e0a570fd0c537b0cd122c0f3f23d130dd9174e1cee4682a712e8f7. 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/6d2fb1d6-4805-4eb2-8b41-e71fc8a1d615.json and https://artists.proofprofile.net/proofs/artist/6d2fb1d6-4805-4eb2-8b41-e71fc8a1d615.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x27692f68fa613671a9e11f727f52a7648b9cb31a69672bade50dcc7d6387118d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ES8022000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf082a1c024c4c40ae6929a717ce855c97148b0a709fe4e05cb1a7c3f6be796bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES8022300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791d5c406d41e9f836f99b363c3d73780b1b543019aef629a26fb8819c6a27f8. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QMFME2309191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271ab11db8074698a15bf5847dbeeaa7002698b3b84685132e9dd7cd96be1307. 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/ES16E1900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a377f8b0e0711b4fd605eb78a37ac6a2cb3c9c4f95481e9088729a61b6a2ee5. 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/ES8022200223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba3938ccae083e3ed0d98a69eb7837057ab9a18838549ee4293a64e2bb7fc6d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TW1826027.
Cantará la historia - Canción colectiva por Palestina
Cantará la historia (Canción colectiva por Palestina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1498c53f93848719f0205514ccfbdba81f35e319249375b8e8c1dcd7da52ad8e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6P42444799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b091bc685117b962fd5183d712e50a96390cfc4b4d31c727533e904acb9d8ee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES8022200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6694eb8d8e847eaf24f3948c142c20f52a2b42402908b39f7e6d44e1fa99e6. 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/ES8022200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1828bdf7477fa469664a1805afa49449de0cbdc110f00287b2a6426cff415199. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES8022200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e89e256c52589d88a1193762ef53d8aaffec539598514449e61db38116d1a29. 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/ES8022200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c793857e4fb0b87163936a1b8e010226305eb6b104b4d9c1fb5d043fd26e97. 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/ES8022200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682007e64221e433171d629c171a150efb16ac54b35d483943607b9847c08f4d. 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/ES8022200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6111a2ddc43d00aac5ddd9cb16a691533899b956fa6798f1ebfec02feecc85e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES8022200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94204a302430bc3ec57e6322a76381101d1a914bbb86b966609df1b11c6f8dca. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES8022200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85c192bd94490fd85066c1fe5486e8129bf2dfd7295614c865102b8fc11e6c7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES8022200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640c54d9627e8b11596f8c57ec764c82565bc62d8c797cb01acfc14a13b0f78b. 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/ES8022200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf023aec2a6a2dee3027cf151547ffaea62ed6419d653addbe479da88d8d7da1b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES8022200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa739029edb1997df879a49d5cb978312689522abcb7bd878008207e8161705c. 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/ES8022000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff6a7c0dc1102b2d8c8112c3df8b1372bbba8a4110dae46785776fe68e98ca9. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QMFME2309194.
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