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 0x175da6ea389197d6030022680a31c8d59222df714b26fd55ff2ff1902e6e62f2. 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/05450284-7c7e-46c0-897f-adcb4bb5c1bf.json and https://artists.proofprofile.net/proofs/artist/05450284-7c7e-46c0-897f-adcb4bb5c1bf.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 0x4c16f6ed27658885150e68527c9395e942e16677df9e97d0948fc7bd091ace82. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:25Z), 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/QZZ972370968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd428b46a9045f6b7fa82f95ca802bf3bf522d740758060bbba089503040675. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZZ972494561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0738994108378c2a7b1773166f18f9cdce0e7e358f365f7096384cb0977dd3c. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZZ972494586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8286f00ad3a73af46bed3d4c0a22cc581c6469ea98b210e527274f4cae2052. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ972494589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955798c6b05c6cbec3d8ef58ab2c56ccda7d671c07477c00cdacaa70c6cbb989. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZK6Q2475750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa394ad10918680bc09885943ea48f363843394ee8619e64ec1fdad17ae0dccdc. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:08:28Z), 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/QZNWW2479414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b602f1bcdb3af0d0140316d78879c64b2ea53241443d371c1f52ec4b7502b6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWW2479415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc21924623c86ac1811729d8fc6f39531fc5a3c36aca4bd9e32f8a0deb28f3d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZPLS2446722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b8af6912237dedfacd72e58346e3975d52025171bee54c68c31732ff22740b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPLS2446728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3861260fbe97e02607a121d6188c655007f8890d6aa068e67dd2b9a6094282. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:29:36Z), 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/GXESV2411665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945f46e2a92ae7055878309a78a5ac645af2ef07154b98a1a3dd51c55f4933ad. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:50:54Z), 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/SE5BU2545885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23842b376341e0d05d2e1634f49a3d6a9c06f826152b9f2e36b98b69780f5756. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE5BU2545893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0b58126c7ca306091617954c9c3e3b04aff9ea267f4eb41e52204ce44415c2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NL9KR2446601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e039ebf20853358857dbc31fc11b7ed49a312fb030f9cce43e0ac5608983e4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:50:18Z), 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/SE5BU2545881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4523cee80d201e69ad83f6dc1b1b80f423c6690820759b4457d8b71023340d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5BU2545883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8730f0209a0d8c0c1d59def4fa7ab7c0129608b31fce2a943edb87f91a6496e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/SE5BU2545884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fa9fed55b24e0fc34a7e560e2769e8e72493c14db1fc3fe83bd57932eed4d0. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/NL9KR2454865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ab90ae9661421794a1ecc98ae509949697b81ed0a644d3e1ec54d11686dd1e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ESA012554876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfc262b7e03426ac18cff83934cad5652712429d768c7d916f333851de1cf22. 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/ESA012554882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ec908c499d3c24ecbb134b2d7df54734a48853228f44fed877788ad313ee8f. 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/QZTBA2569039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000705870f62aa233c7c818c8feae96b2cba5d92f066f03489a885bdc026a79b. 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/QZWFF2587300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce497def685c19158e858bd0280789260f624644992f4294488d2a95222d4f11. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:53:04Z), 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/QZWFF2587301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9298a81252da3119512b2f6ceca49a72c29378cab8aeb2e90745b9cb24fed850. 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/QZWFF2587313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4d78dc335880cc63cde8eb782b66390f21e1613c0d45ca8f3dfc5162e5e995. 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/QZZ792591947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fc073d5fdd3d45492b74d293eb56e12c4528646f923da005487dd815479a95. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ792591954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd05e1d82211d6fa9d8e5adb802b9243cb757ef30362688761ba9e3905f9bf3a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3FF2597421.