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 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 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 0x4c16f6ed27658885150e68527c9395e942e16677df9e97d0948fc7bd091ace82. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/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 0x29a18a8800fea9437875770aa6f124cc77e2340d86ad75856f081f07604852f9. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QZZ972494582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88f0e49f3e788194c444a46676a0c9f40eb81f54dd8be5774bdc9ce82541e7d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZZ972494584.
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 958796 (2026-07-20T00:01:46Z), 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/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 956822 (2026-07-05T18:48:28Z), 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/QZPLS2446728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1629c9ce2b313b9f30eae2c3515177d8fb47c0e143387c229dc71d83afe92106. 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/QZPLS2446729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3861260fbe97e02607a121d6188c655007f8890d6aa068e67dd2b9a6094282. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GXESV2411665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a6f43f4785d898725d8421d49da83dcf052d1fc9d866ff11c4a21212524390. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GXESV2411146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaf8552d89e25dff2d3f414aae6798a6d81ba09a89a6ea3603b6875626780b5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZTBD2539633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945f46e2a92ae7055878309a78a5ac645af2ef07154b98a1a3dd51c55f4933ad. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/SE5BU2545885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6a4bb11eff3242320009bef287ea9d3744688652ae69e0d1af614c58998f94. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/SE5BU2545880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23842b376341e0d05d2e1634f49a3d6a9c06f826152b9f2e36b98b69780f5756. 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/SE5BU2545893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0b58126c7ca306091617954c9c3e3b04aff9ea267f4eb41e52204ce44415c2. 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/NL9KR2446601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e039ebf20853358857dbc31fc11b7ed49a312fb030f9cce43e0ac5608983e4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE5BU2545881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fecf2eef9d190cbdcf32aefde6f16a06b20e1f1a865f2c498fb1b5db7479d6c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/SE5BU2545882.
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 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/SE5BU2545884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fa9fed55b24e0fc34a7e560e2769e8e72493c14db1fc3fe83bd57932eed4d0. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/NL9KR2454865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf354e1431091a0d8921fd57b1790764aa81629e17776e583c7c906edea562451. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/ESA012554873.
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 0xff02740db6ed8765249bf516dc5ac2114e61180b1ff9e795d17f28ea9249bdc5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ESA012554879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf6eec01cea5eac6415f0daae823d83144be797003698249c0e23178cf0c67e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ESA012554881.
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 0x1696fd568467f099549ad8af0b845524503f5fdbd3bdd622c2a0d08fb4b0ac8a. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZWFF2587299.
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 958383 (2026-07-17T08:20:01Z), 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 0x6904421223adae6af21f5fc34c91ade3a4299bff3521c5190c420c80130125ae. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZWFF2587302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4de71d887d9ea1352043f4be603681ed2410b2e17f0bed442e4332c943143b. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZWFF2587306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcb668421e973d7d49efd8ca4078556f62af12d55119aecdd1dc2cc14048c32. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZWFF2587310.
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 0xcb41fd2e86d95ca362566db418a994129f550a5e25ece48463d4be598c42541b. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZZ792591941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ff470d2ae0c490614b6709e6d60b9047803cbe5d37efdecf1e873191da86e0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ792591943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4d78dc335880cc63cde8eb782b66390f21e1613c0d45ca8f3dfc5162e5e995. 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/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 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/QT3FF2597421.