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 0x28be1044aea35a0f2ac5550d5c1704da9a021acac16aef6f121203efcda1bf17. 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/70d608be-9a88-443c-a8ce-190d39f32b02.json and https://artists.proofprofile.net/proofs/artist/70d608be-9a88-443c-a8ce-190d39f32b02.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 0x002e368a7f47e8af22c5d063319c638402cd69ab3e971ca488fc3a9ec3ec3745. 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/QZVFR2301317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391a7424eb539fc47a86c613f687774340532273c1cc78aa506fa8de83ff8119. 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/QZVFR2301689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbd72c70a61418797a8adf2c8e58ab99b6e68b86e82e7b23464f484a88e700d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZVFR2301694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af7ea95d1cc4947f5bc5a68e234081635c260cc85c7b4022097ca1b0b36d1ba. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZVFR2301691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478e858785dc3b75d6a5fd098888965905b6aeb3f3d0177d62a540014b2f2877. 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/QZVFR2301693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3132e80eac2d4be68d45c07e71ddce2815082e1be7eb0f1f306dc385f7080e6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZVFR2301692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434375e6974b681cd70ece197a9d53df5d19794385c284c39a053d85f64a76e6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ4JX1761725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda050fef0446f581882594d6c0d716e6fd21b1f19f93188442f45dbf1dc997b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ4JX1761726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3247e3a5e07f5621f0025604f9b736ff497f64d99fac4f3484e9ded57475807. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ4JX1761728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6595da60e7023888fc115b1a174826c8fa7dfccbf58b68082f890ce9089cd194. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ4JX1761731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2fa6241a80729d7ca007512f39f5c12d5d9c653a2f6f23350b560747cea12a. 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/QZ4JX1761733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f5cca3acb3f81dd0446f83a6675ca865dc6cdfb26f91799d4fe56950bacc65. 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/QZVFR2200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f2ab8764d9452c5f18d20fb781849e95cea65acd4b261e5cbef271781c7946. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZVFR2200126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7860feee5fdf0e958dd7f2b4b66497917a77a9954c5642985f97a413e9dfbb08. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZVFR2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404ca648463c3ed44d864f097e5fccb6575aa4d9e2694f0e4636b49ddb3e9abb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZVFR2200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c17f86eff597b62965d2aeeb58b22b7ee8f82f4a043bf47b57bad20f3e0ba2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZVFR2200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49431c22c94c2714ceb3f58f60db0b6bb9d53c3f52cea24eca4ce1bd46006639. 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/QZVFR2200158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc7ca981a2cc67f4fde395e934230ce2624cf4fb3b763f257846e9d1735d679. 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/QZVFR2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bca987028530b7c40d509e98eb46ff7ee31835964610afe395b08549993e4d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFY2196887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a8a5630393e4ce075ae25a5af95247f2dedfb01d8b6984cfa74caee1ee9174. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFZ2111895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791675e4046c78747a5c1fbf4b13360660d3069054f2410e5180c991b8c10c10. 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/QZZ4J2400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4e4170e8ee57fd2d403a4c8b33a7fc3c9b069d15e427cfacd7cacd8d7c04ad. 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/QZZ4J2400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92519cf116bee5d1434247d03f426f89f1b021a4b0574d784bd121ca8e6054f9. 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/QZVFR2301761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5762e25810895216e5190ee888d6da225eae863c5a9d35f351b6fc1aaa073d4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZVFR2301563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434375e6974b681cd70ece197a9d53df5d19794385c284c39a053d85f64a76e6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ4JX1761725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdf454d29dd29114ba652d9332265a51e61df8f74e48b5cbec9ea88f98563a8. 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/QZVFR2200308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1b6d3b1386e851700f0761a4a605d46725fd2f9a5caa97f435d70b1b38083d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USQX92300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dc9c0ad36b92c83bdcb3c6232dc77a7dd0dfd8f4500de433e644f245552134. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZVFR2200241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df1c720658c6fcb94a1b348774404e87bde5ecbe7ba82a35f96571d1e676a34. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZJ842002141.