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 0x7cef10e69f3de763111bb527b02173254a51f785b8fdba59f7be0471834698c2. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdf468f6-8762-4b7a-902d-db55f68c6c9d.json and https://artists.proofprofile.net/proofs/artist/fdf468f6-8762-4b7a-902d-db55f68c6c9d.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 0xd915e49f82a3dfa9fff844faf8750fd7594bdd5a38b5cfcc0a82aa4ed28509e8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:07:02Z), 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/NOWGR2401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba8928d1cf569fcb0658ae9a9148258a941450f46275946a0831f3cb3b6de9c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NOWGR2401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35ab901c246d7f2621165c3cda23cd5675e1f97a1dfa0a7e4e00ee8b2185c8e. 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/NOWGR2401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8471f64720930431e4f9c45f737519eb9440f9a55d19eb1caf4527853148ecc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NOWGR2401050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981b27c75b0c4a277aa2d345955e206dd14d9df13ce468cfc69a0d84a125cdf8. 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/NOWGR2401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2924ada169dc2491bbeab636f816c83875a9787507679f4425acb1bdb78f54c8. 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/NOWGR2401070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7ff9b1bbe7d4becd5e162d3f4809803f9581aaa9e373645c302d2e63154ef9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NOWGR2401080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c664ecaca3ea806b650aa74883da2a6071d54348a8eac6faa77e3fe79942fd3. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/NOWGR2401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fc9f4b99df36469311e4a86ebc1361f322a3152a93c7327719c6ba004acfa0. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/NOWGR2505080.