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 0x2d3d42557e4fc3d499baaebf00ba1ca2cc4af872f6d112a0ff29b3e79817c693. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6f2a1af-9ff0-4b36-b4f6-46763b28f709.json and https://artists.proofprofile.net/proofs/artist/a6f2a1af-9ff0-4b36-b4f6-46763b28f709.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 0x2afdfa0b207e58497815ad8654e350e3d5d47acc11ffcef251749ef95ad060cb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR2X41884211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce52e9600c15e0f84bc22a135431a83cc9cf6d41736a2ce50927d409c9a9485. 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/FR2X41884212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ce94cc8c93785ded626df48234f5fcfde6f71b079695bf06ccc74aa6be6f3e. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/FR2X41884213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05d56c483e8c9d519b4194fc3a38117c4f21759795e1b72c06ba80bf18b2627. 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/FR2X41884214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc388097f8956da7cdb8e38d92a7e9dfb2684a1d9c68f9207386eca6b31cad2bd. 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/FR2X41884215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0746841105c094015f2c3ef0be21aa0172fc5cd4adf126600c9778ac3e7c59. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FR2X41884216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb0648d70693140d34a81a171487ecb4b04b13dcb851bb183319ccec298c50c. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/FR59R1813745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd91886f8228744056b6078986e75adf04a5c584d8ba61c079f5bb4a8d1f808. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:07:11Z), 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/FR59R1813746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e830b58c7e737aff3c50e6ca245221c349b04bf23f4ba55528d7e75fe05cc06. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR59R1813748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d8ba0b2227303438340f2eb0e87ecbea13f741a170284d613be3ac7266de3a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR59R1813749.