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 0x2d6187a66a4462fd623b5d620c52ee6e77abd7c4911b0b41eede94c232665d29. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13db0a92-7d08-489a-9be0-8d55cde6bf2d.json and https://artists.proofprofile.net/proofs/artist/13db0a92-7d08-489a-9be0-8d55cde6bf2d.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 0xdda11c1d0775da89f977c7bd6ac9467bda66bd5bc7221ba02157931197eb89d8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZRP42374368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6786c88ceca816ef90421ca6fb553b8d30801b92466864f6c23a464aebcbae. 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/QZRP42374369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326333851a279dce677e8da48381e712ca55d17341f230ab89257ddd0253a838. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZRP42374371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b105ecd92b192292033b125cb322ab37314dfb988864f30a1d7dc28cb166a7. 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/QZRP42374372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f845862369d6721ab603b2829171f855cbe14499eb2d38466b95eb19c7c978. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZRP42374375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a60c9ace0282e3ca691a74efc0e7a4840f2c647a2b3a22275f9685be148d48. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZRP42374380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9143bc13442da9b8257a63f017c09ed07044c6b222c73174b236d68bde2b60b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZRP42374381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a9a56e3b540fa028cfa689f0e87608f66f61034d5c68629c75826d404211c1. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZRP42374385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc565b8d1ef10e01223c9b85762eeac307bad07eb166617e85d4f76aab7454ba8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZRP42374387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59741d395e61219400d3508bbcad79dd9e2e742107ef57705840137364de53e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZRP42374388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc05b7d9642818fa1c123ffc76ca1a825cc2f0817ef13cdc454d185df628182f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZRP42374370.
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 0x108571488056d3e37b3dc3c4595941557fb3f4faaf857697590ae822782e7821. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZRP42374373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc972b6764c6c4ab8b3b45ac8c76d29cab32f680ed35f1ef1da7621c078192a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZRP42374374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd6f0bb71bd7cb1334641dd7a06ee2c934a7a2e9b9cdfefc8c2c0cfc0d5978f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZRP42374376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb841d9ec3f7922332cebdbec74894fc3a1f3510f4d5129d2bd62a0953b1cce3b. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZRP42374377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38255d0dcf3b63fc41245492a69e460d7499b75f09d9ac02c78b1d050cea49a1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZRP42374378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4846b7a2b2e0f4f5266462fec38fe71749bba43231f69bd592cf90f0be302bb. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZRP42374379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dc094b13d00bd13328ce0b5e2332268f3116c3c4d4424d16c86724c7dfea80. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZRP42374382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8c93068cfb108444a29bdace93760d758746c67f38ac498822515a8536757d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZRP42374383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931398ded80fbf5f55a1d94a3ef8c41597c074f38daa26be970dea8d270786c2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZRP42374384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3b2bef269b37324d070d05a691347c508e1324dd1ecc7a5b9a43672f44504c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZRP42374386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509e8c3c502e32ddf6ac6486437f83ec91814b2f402c6aa8502f64fcdc9937f6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZRP42374328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e1c6067bb2b7abb498f1d45a75d916def693ee87f93530533cdd94a44f50fe. 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/QZRP42374329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c2e5c83a30243dd3e66a8ee182f69e5e3f4a34cb128bed5bbe34169d5202bd. 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/QZRP42374330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d35b1dc0176317eaa5f3f9a47b03e0743b125c02eb3b49fcff410ebf731ba62. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QZRP42374331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85694f2964efd2ae2df826fc9803884f6efe7e05bdd9efa2186d4b224d27ed98. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZRP42374333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249029a390ec7953ac631f37ebc9747663af06738e28a1c129278ca068640b7f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZRP42374335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb3c9e52c2f131283a9091bc9eb12fd340598837abdcef3400bb42904e2da58. 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/QZRP42374336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd029b8edeef6b9917297b978c6077c116838723ac595efc0b08e05fa5f5b2aa5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZRP42374338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdc21e51a97001c30ae8a32ce910db7c04ff368d067268d0af9cc3762d1a856. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZRP42374334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6ac7738c956a5904b7dcdacb71d4dd45568a6631ffd4ae2eb4119b87ef5926. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZRP42374327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456f8c268ea11624eda40c1b18db2bb64c16cccfcfabdf2c728060287c2b070d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZRP42374332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d62b2ae996dd02c2e7a3f360aed709483ec7869d760b46cdc481268007706fc. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZRP42374337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdc7ec0acfb865b7d3b25f8cc50062e9786b2fad309c27c0897830c300d99e5. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZRP42374339.