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 0x096658c0ea3f0d16bcddfd20752fcea07de7e3b60a12d1c27f38801f70553651. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31ad9f58-5768-4d39-b6f9-9e736699b480.json and https://artists.proofprofile.net/proofs/artist/31ad9f58-5768-4d39-b6f9-9e736699b480.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 0x2b39f84a89f4f464871d4842564680a7b38facbd62e72d183d7e7a17e130e626. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZZEB2476440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586a3c41a6d4337308e24375da8680c9882ee7d9705abaef7993526eb94ce4f8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:41:55Z), 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/QZZEB2476447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091bab91fdc97ef6c967d47ccf1a078916189f47c905b7b529441fcdf8ade507. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZZEB2476454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc771b03e5a1a7d1ace0e9afb812aa86843e22df24a80d83f52ae08472414c7d6. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:10:10Z), 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/QZZEB2476459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe445c02d8cde0ccefbe12abeaab1388574a156a8d05e05f68480c63cb3f6a4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZEB2476464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9205bfc08e087122318d898fe234445c32f4dd99953de57119f543a25320e434. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZEB2476470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776b2bbb9e63a454d757f0cc507a14631fdba6dac159862c44b10bae34694bd1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:34:02Z), 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/QZZEB2476476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8093a079aa75ee08a80bbfcefb4837f989b48a9e8db304e802769da241ace1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZEB2476482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798b0b3ba278db4bf4288926ebbd675fb3302d06ea8d1d03cc20614dc4e86084. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:34:36Z), 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/QZZEB2476486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebde76c8f4035ad24a8d0ce5feb58eb7cb5b1139c7f13b33d75ca23e07dc547a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZZEB2476492.