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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0221dcf046f7d5ec92bba4b30201b34c6b47cab04d0443e70f10f627e709569. 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/e47ebcd2-ca69-4885-b69c-8f547cfe5e36.json and https://artists.proofprofile.net/proofs/artist/e47ebcd2-ca69-4885-b69c-8f547cfe5e36.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435414743fa59d67e0e78c75de30501486e731797386771d5b3515f8e704dfc2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BRTCD1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddfeca9d1c5aa314dd5069cab74cc674344aae6d18aac34b0f73ef212a4213e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCFHP2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d39797ea59a4c030311612807321b53d14f92df7fc99171128c536ade101dbb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXIWW1800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9add8521328bfbdc2e88450eaf4a167fc0ca5e211cab62201b33361657b2df9b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G1705686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102e9cd7ae7a6b5f1eefbe3285de65a64d8d90737ad06f47e7c495b578ed999d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G1612996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ec9f70bb530eb612ef3bb43376ffba589848565112f767f604a07b8ce58008. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG1527644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10f5a62a08865203fe63a0709adb7dbaeb4d65947a062d0980e8d57e5f35c5c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US7VG1527645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9897bc7668f7afe46c6e1e4a2050c6deae605d59c4004d29a6fa9e59b20ea4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US7VG1527646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d46122279caf3c3fa2fe559bcc67585cc20f56a687b83a90ba860ba4d86c1d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US7VG1527647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cbacafe17e304534a673ce5d9ab805e589ad657893ab2096f40c4d7dc60e2e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG1591157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621eb1a15d3e4beb275ecc87344b4a95d21dfe0021997c58f281c69ec0e91287. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG1591158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc404f7b5a86bceaada8eb1dd646a42d8581551642edb4bca7e2e2573f511e9b9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG1591159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ad9ac018f305da478a4903a5ba3d930f68256c437e2d64559c281e2067e2ab. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:43:36Z), 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/US7VG1591160.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426048f54ec2a7fea08899d88150dafd66dcdeab70f472c36b2b06c3b10c2c9b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHZ31949761.