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 0x953ac0700294ccc12dfdf1f71b3e966be8bd56088afd554caf755b820e30a5e0. 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/eb6b55de-d061-4999-a62c-7613d46496f8.json and https://artists.proofprofile.net/proofs/artist/eb6b55de-d061-4999-a62c-7613d46496f8.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 0x32d46e5d6bc80053cbbe10577663fec35b1a42a19bf04eda77dbd1e1b5428573. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/USL4Q2324325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc589f9806a210c02c9a180c41cd1cc0dd57a51c9f60beb903246ec33437253. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4Q2324326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3a60fabf134d9343043c5df4abede8047659f1cfb2cbf11aab8b0bd04a1a3f. 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/USL4Q2324327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efb7dc3ecb4e73677d40d44990ed7fb8f8700add416a3b960397ac9749a4b60. 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/QM4TW2576306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c150fede340a0334ca9efaa5d53fc9670aeab3778965895ecd178772051681. 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/QM4TW2576307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97e36a71624f014f25666e2cf7e65e0f2072f47de7099d34cf871843086e81e. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QM4TW2576310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efb7dc3ecb4e73677d40d44990ed7fb8f8700add416a3b960397ac9749a4b60. 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/QM4TW2576306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c150fede340a0334ca9efaa5d53fc9670aeab3778965895ecd178772051681. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QM4TW2576307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949bc055dd293bac281aea3c2ddb9dc076742e076d1c05e5180ae24b971b6594. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM4TW2576308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd43f90a2d31cf88d20ea12c0395bffe9375b5a35d784bdbeb610edf099a638. 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/QM4TW2576309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97e36a71624f014f25666e2cf7e65e0f2072f47de7099d34cf871843086e81e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QM4TW2576310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86ff4c83e5ad20b367fc6738fb31c14198891a5f6bfd0b35a39e35cc0118fe6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:42Z), 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/QM4TW2576311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d69faa1a7dd3a61bab64269e75b96c7a65d6200b15c8c00c22526de803c9fe. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM4TW2576312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de0abb8bb8ad8c2e3f8b50e874f7e1183b62de2480786777348724eab9ba354. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:44:19Z), 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/QM4TW2576313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf914e98bde30cf96eb0631c01fe3f661ced9ad35e7fc3695057d375350009bf4. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QM4TW2576314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b963cdd565db542f0aa5bfb7a82d62505b4a6a64471953d8e926199e062a67. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QM4TW2576315.