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 0x3f115579fbf81d267a8bcd779af7d3ed2f817e02593b8b94741b1c16285f40c8. 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/5a159e2f-d89c-4603-840c-280d20210ac1.json and https://artists.proofprofile.net/proofs/artist/5a159e2f-d89c-4603-840c-280d20210ac1.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 0x063dd9301600c9b0ecf6972bd3d96e7333547ac64a1436d25cf0de992cab582f. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/SEWXY1700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b2a243ad10f0b0fa69d31c12324cafdb1f1281204990c33dc7ac3fc158f5f0. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/SEWXY1700206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7657298b22c27326ce4827568e04dfa0a7f488acaca9d6dfb78fac81ffc3e77. 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/TCABH1258855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2155175bd885b4dfcad2ad6e88143267e55d458a1c2f23909457b42f948507aa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCABH1258860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe247dc2faac6843a330cc1ebaf9d06444e9bcd8e8eaa4a9b851251321df49870. 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/TCABH1258868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca58c647dddecbf5da9b2472e43e3f474dcbb0a573be76fdef6a0b60fe4058df. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USATO1800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158e4989d23884c507f4bd6318f871cca920b4c921724a97342c23c0916d416f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USATO1800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575e8daeb4fd3402a93d0a66d034ca2ba266a8538366840886c889155f4b09d5. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/USATO1800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d08df67cf77d57c30e58984613e5d7873eda89679ca7197de5dbf3f2d92075. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/USATO1800098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d08df67cf77d57c30e58984613e5d7873eda89679ca7197de5dbf3f2d92075. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USATO1800098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca58c647dddecbf5da9b2472e43e3f474dcbb0a573be76fdef6a0b60fe4058df. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/USATO1800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bee131041a3f7c3253d432a48e087ff3edfc101737d7595b7f6b812bcf41eb7. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USATO2000277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfe45d95a001a20662606759f372048303ba807037f743a6317ebfca1dfab4e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USATO2000367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e52212fe27bfd46f05ac396f79689d6cae15a48c8484429c4bceae1734cff7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USATO2000278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e52212fe27bfd46f05ac396f79689d6cae15a48c8484429c4bceae1734cff7. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USATO2000278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04df2afed3bbd6dcdd0ac8b562cad30742f48139d17308b447f58be0e0a3ff9. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/USATO2000282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d376e10b3713f8fb8771d8f950010da795709ffffb197ee4e400e555fc015d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USATO2000286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817d3545ba92fc2488eb9a08d54f6d518d4a7df9844713786c9beab31565fe12. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USATO2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817d3545ba92fc2488eb9a08d54f6d518d4a7df9844713786c9beab31565fe12. 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/USATO2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513d332f2187d252ed4d3d9cf1343b563e76552d66931f03a29a205a1e0632c5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USATO2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ffe276eba17e189d38df71517004d54cdb32c81cf69e0886e5465deeceaeb1. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USATO2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8095f1b3e36761ad24c486a86ed67be705b8322d2de7cd89fc11c7a4845a8f10. 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/USATO2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79d03e9a1934e3f88520fc8a4e9c17ac2336407c5bfbcddb383f723eef3f6a8. 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/USATO2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a5da347ef31436dbba9bb99e100a3a233504dcbda5cbdada14c76ff12a9342. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USATO2300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa139f2dd978426083658783c92241dc88fc2843df50677fa51ca15256450ae4e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USATO2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4477d42e73c4980bb34cbe1408e2e0b65acf4a7f9b6a9d5448abda436f5558ab. 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/USATO2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81f7fbac05ef21c30fae9381398376b7b4d64e19f88e8489c18ba69e52fa421. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USATO2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb724e3c2363b31fcc180bdea010aafce26d9abd05d120a1310f8a7bea8b9d6d0. 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/USATO2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccd1a6f3d1b80abe81a8d4d65600b7b6ddb06a2bf5e3f08abfc9fbc486bafd2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USATO2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7daf8b5b2c16576ff59260117d4a107ffca79949a3c05683a126f51516aa2d2. 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/USATO2300045.