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 0xd7015333a427de202119cfb77955146e66f5882faec70b4c5c371cb0f3fbe926. 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/330f92c1-5cd3-4a5e-b29a-2df46932dd8d.json and https://artists.proofprofile.net/proofs/artist/330f92c1-5cd3-4a5e-b29a-2df46932dd8d.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 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 0xd31df6b0c79c94e94f49e0c301ac4d9adf273cc8989dc7fe4c0adf664d76f920. 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/DEY472374269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f46fccfbd2bda04413e1f0732374113cdeb2dbedf8ee62c80ac15d79f7d864. 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/DEY472173771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9a3b5d8cea8f52ab2a99223d697d600fca5250c7270a4a59e944baee7781c0. 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/DEY472173777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498c6ad3efa6590406b5c8bd951982902eaaf0412e8dcdd2ff6125104d4246f9. 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/DEY472085079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072909c6560cd97a9dbe9eea38855c46138fd0c9803d59db0102559bddd6adfd. 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/DEY471981378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b7a79fd7a2ed368e45c3bba2512162398319aba7c600390e40083e56cbec2b. 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/DEY471880684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff6be39055b7b4414c25357dadbda16ccff356f4ac8339ce489165773d84412. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEY471880685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd606080a8bbbfc22b97d2331d48656d81cbf9744a5aa8e73d3b39b3a689251a. 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/DEY471880686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5596259bb888965f3031f03d1742bacff0dd054b389655845af8efa69212ce. 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/DEY471880689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75d4e07cbc32ef5261f36af62b6a56b4c442ade05931a592a874058ded66020. 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/FR96X1750735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0f00e11c83fda9519119b0632d97cfe52ba148568ab4f4ff78ed6a00580a3a. 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/FR96X1750740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e06ece5d1e1f1365c535ec0a3610305090b5f083720622fb3f656726f0b8fbc. 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/FRX201536346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adfad790bf1b9be899b3fd12311e829105df5f9d47c1927f48d0df6afee2469. 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/DEBL60337306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22654b97b65feaf933f3a200edc62d75eae4416555fc805f2c195ba51e1411c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DETO32300400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7416ed93c29a658eaccfa6e23b3c3d8a9df5a3e0ed73a794e77950a14057f401. 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/DEY472371892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba369808f3e03bc0f2008f98e5247b6d505741863a13998dfe3cf5a648aa83c2. 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/DE1BE2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c81290f2e677c2c14d9f2a2e9029d6efd927e519ed734da839d8c7603b1d06. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEY472278795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2173e0f0b40b0f92ccf6c1b9afff0fd737560a056cf3afd3b3fd08805cba5f0e. 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/DEY472275878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74549c8870f316fcedc2c581776b9789438a1392d6b6026a87ab4b46ff39287. 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/FR9W12217403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebedf2af2761ed05efb2e3bbb529294cf2b728cf4baf11a0e2ad08a709b52c26. 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/DEY472273932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dc4b51f7e72310516cf0510a6e199b8d5084b7cbcfda515770e36d233ae116. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEY472272616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3c8e280e5bc1f104b6d47a683d8f387ccd6a53ff9c2d1acf3a3d4307a1ebe8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEVE12400054.