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 0x41e093bb549eac6a381326171bd325b02396473f64c7110c338b3169ccb6ff84. 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/f84257a2-0408-4d20-8333-bc2352b489cd.json and https://artists.proofprofile.net/proofs/artist/f84257a2-0408-4d20-8333-bc2352b489cd.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 0x27b13a0995f576d6bf81f4daac25d8cb021782622fbd0b15ca8eadada17377cd. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZ82J1700005.
A Dios Sea la Gloria / Cuán Grande Es Él
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca22506a109a5cdcc60c02a57f4ae71afa694cc13af217d04583f03742cd6b5. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:27:54Z), 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/QZ82J1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb818734a653cc13663e7efd37052d3f0688c268e18236284e774ae8ba1b1baa1. 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/QZ2J21513371.
Escuchad el Son Triunfal / Hark! The Herald Angels Sing
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e58bc603a6ff82d1ee1f5d12c1cf663220c44327978a213f2a505d6167dc7c5. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZ82J2401230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dc57f1b87369ba6f62762526fb8c9b100813ad01d8d14c356df0cc0888ac96. 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/QZ82J2401231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcad03db44d46bdbbed5fc0ad9016f05b9451ae0cb65eaf45082b4011f56c80. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:51Z), 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/QZ82J2401232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035ea34335c330397ad7dbfd4d0953ac4a9b09bcc688c5e6228ca98f923da646. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:02:34Z), 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/QZ82J2401235.