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 0x23b4c66521d2900e137a54ad96da72fbe40572950e28e124ba1bc0193199fe6d. 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/4269b622-1ddd-4977-8552-445a4054a992.json and https://artists.proofprofile.net/proofs/artist/4269b622-1ddd-4977-8552-445a4054a992.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 0xfc21fa5101a90ae5979048c877f1c4f46568cbf499e4f8e6c56de21985d9f0ad. 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/QZES62275148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c86dc3ccca86198cc2b7d8041bf56081811231ea8c8fcd4bbae06be55e5293. 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/QZNWV2143678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c7cddcb07e2fb3b654c17294dd5af79254edd5c0878949af7efe06bce893be. 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/QZNWY2150039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d24f1c0f54bbadacd13e1d5239dbc26cb240863c162d7892295d011bf8caf7. 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/QZPLS2117788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079a5fa860d622ef6678606d027ad2fe57e891c8431ff7632c4dc0b69db98585. 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/QZHN72203744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c375dd7af8094937d289da22f1de9a06ae7d5d6cd4957c6643868faec89e33. 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/QZES82224109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8907676e158d08b72e83b434b023e6bca40f94a31176af49b4a17b84c9a44f0. 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/QZNWR2115362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbf7ddbf995a0fe4ded5b60c45afeb56c6a8b1ce43f198b4a51fbcaa6956ea9. 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/QZFYY2272777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341f44d19d2831c5737ed472306760298869b43c8870bc6f6169dbe266eda03f. 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/QZHN72203745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cd76e216c8fd521ef2dab78c44da0ec50e0a57c68d24727bb7ff7f12bf5295. 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/QZHN72203746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50da524b02351072f1b722263c0055938dc784b622bef592799dca2aa748db27. 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/QZRP52159082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8a1349562e88882e20b2cab877637638e14c2601516fd2730afa874eb5a1d2. 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/QZHN72203748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb778beff9644d3d2069684b0f4b246d4ab33aa0f3fb3533cbdbd031ce6e07ffb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN32231339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460008574ee5881c48ca663518145f5735af946e1e009806d6fd1433b8a4f83d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN72203749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9fb2157ec7bb1d5e8ee3dfc87abe8467440537ca44bef6dfa157e4267c18e7. 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/QZHN72203750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75b8671435fc6a5aa967da69e2f57b23d02d76a5b89ef9f53895e3c15534b56. 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/QZHN72203751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f90aba49d4c75cbc9418547d8e542086b3930fd3a9ecee18aa46b2fa0b07a18. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZHN72203743.
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 0xa1734253b0293b34cb403dc4cddfb7e7862130584101f69dff258aae2577622d. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZHN72203747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfad1064822adae63cebd079ff3926e471687ffa3769eace67eb39b214f32c9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAGI2263239.