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 0x0e8398f7657b6e97bd8cd13d32c2e58298bd8e3c529309ce82650ecd03ab29ed. 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/2eb5daab-133d-4084-8815-7310d5f875ca.json and https://artists.proofprofile.net/proofs/artist/2eb5daab-133d-4084-8815-7310d5f875ca.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 0x403f268b893cf28007b85e6853bc2754e83032fea7f3d884832d8baa16901a4d. 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/FR2X41929682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840e441a5f99620c9c5d44f360b677214e2ab0c6161eaa219072b5b75eb98d74. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:34:15Z), 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/FR2X41941414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f492547cbcac435af49cff217775fe16b06f484b3a67c1138342d118305c2db. 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/FR2X41941416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a16aa7e40e1fcb235a5231cdea3122f6eb4b0ba9dda4638009943da091ea63. 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/FR2X41941423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cd843ca7d0ab5f641d03d474ea97fbc193cd43a194e9a5b6c5769b09233bd6. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR2X41917437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010d12c2b6aad772f44e06c59101e98e17876e4163193dfcdfd471c26fa754aa. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:56:51Z), 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/FR2X41941434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe504a476fa24d2161498fb3e43c9bbb890a71890e411bfef32543369305d66e5. 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/FR2X41941435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4842ce2383bfea7e8ff605d323ba2e0d5caa21f42e5ba19da8b7d6e95fde947e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR2X41941441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cb8b2394f1197566ca3e89b31fdc2933d8cd033d982816dc6e31c570750483. 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/FR10S1994265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791989a04adfa339f3759af27c6115a6c3e6d9c900727e9668947cc270f82c70. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FR10S1994262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65982432cc0846455605676c0499cd634347babf22104783cfe0237020f4168. 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/FR10S1994263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b3411455ad149a2ed8f6818aefe3a62298cbd0584bad7b42804d2f80adbfd5. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZN882169092.