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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 0x3be43f8b570fd2a569dfb145f34797a822b620c0280275cfd1b9930c085301d8. 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/41d2f8c9-5cf9-462e-bdf1-23a4ff3b0390.json and https://artists.proofprofile.net/proofs/artist/41d2f8c9-5cf9-462e-bdf1-23a4ff3b0390.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 0xfbe1e2069c6f27b5ee04035a21f7f613adc1c449d3f34998b5d8a821bfe78539. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCACY1753787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe981f14dcffcfcc189ca4de80f19942c08543dc6d012a03bd9ad39798189461c. 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/TCACY1753788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c8b32a8437077fc30af0b0cd26b3051f830dd3c1325b7a16322f03a56988d9. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCACY1753791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4d47dd4dd8902724f5714a51f0f0c97ab1e2370b87244d836f5df91165e337. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCACY1753113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e37d08b8020edd211d6e41a13bc5f99e318f777bd989024108c617cb0181bb4. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/TCACY1753638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d85fe6086d6ea8f8eb8864b241a27a98ceb63a5d34efea0c9bd54651b86a4e1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCACY1753646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b031209f7f13767fa0d84a579e41e117b90fcbb5f7441642a382b62f1cd96e. 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/TCACY1753649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce52e62e3ac6b9e6d37d6bb918ae4a77ed583984747d67572256e127b3c54572. 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/TCADF1745243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2628b7dc0cecd999146396351de7c629b33ebb37feb29dc2883f5e3718a0483c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCADT1856219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdc059dd4a3660d6dc8f00f06b103b85c6867715a2fb1a9c4a2f438824a95bd. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCADZ1882266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb496f467dce510aeaad0dcf17c63e0dc34c44d1466672916c51b25da1429d46. 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/TCADU1842575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32be4a449d14e4bd80b50e7b6083f427dab3e45bdd9a0785905f9638c86404e6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCADZ1882297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b3f1e82fc8630910c82bcaecf591757b1b32c56db4b47a7bf02abae6b13c57. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCADT1856227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83373fcdfb260b7a9afa28edbbab9c85a0f0fcf89c0b2ce036ed66b1037418f. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/TCAFA2082463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093d7ec617c89bfca3710d3d828fefb7a94116bc2ee81bb9b2d560a87d48ea27. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAFF2035652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d5fdcc44619eaad0fdc5d827e5a1d98f5b43e639386dc60a2cd48ff26ae005. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCAFG2003219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb2041172edbe60938d5efc9a5f62ee7813fc83a32384b4302e4c1098cfa751. 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/TCAFS2159085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed515ef52d0110208ffc803f5002bfe5d2a4cb84cd225d8c6bbb0dc3a1d11d9. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAFS2159093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcba290bbbfd527e8e211b855af6d87ac5f13f6a533a7251ba657a62eb1b35ac. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCAHJ2361824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67358472180a73c1c5a908cbb540caed99c6683b54518197a400ad6eba969b74. 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/TCAHJ2361956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627c4e853d6a4d0d0f642b393ed0b0a8aa5fb94cddf4f353b8bb57b84d7d847d. 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/TCAHJ2361987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e44df73ffc6449184cb7aa089ba840af9450f77ead6d8520575f8847dc43b7. 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/US7VG2575671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff6dff71d1ca4f8d1390036f0dd768cc34e9df041d6a31126468c65f8787f42. 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/US7VG2575672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575bcaf9e2c309e531437ffb5ec8946125768e8c3d7072dbb6e3dd06686bbe99. 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/US7VG2575674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db97477211a2afacd7e36c25d62afcd7851946bf1be486d6d6cfc418213261d. 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/US7VG2575677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b88b9c57134d2917606fe6c4c09874fb174a1abfcdc87dd54b94d03c491e02. 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/US7VG1745750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf793c06b8f49edec1d71c15768ae7108ed03a6f3ef6fe68846a42a356ffd39bf. 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/US7VG1745728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a990d24df7087202bc5c9f94d997e8c05d967f5c780b628470c979ffe8b991. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAFZ2281273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fa70babbdb5605acd19bb375961c62ba3151f40cfbcb366553d0cb94d52fe2. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FRX452279198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb000290f899229aed7f67e0aa67005a569b912a016e95fbd1414ca5403279eae. 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/QM6N22481596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b38ffc6be4481496570d9e330c2fb5da7af14ac091a44e0319c298af5499ec. 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/UKXN21919563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8643b99fb8cff76aa8a5b6aa793d1c199e0640c71532b1f262b06d2da0f7856. 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/QZNJV2432115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81cf36fd3e151bdb505576bf9179c0d120a7fa21574672e84a96703dc6e4672. 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/QZNJV2432116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2b89e3d5f03da6ff56c9f8fedba1d659d09b5d5326b2c907ac274b42bbae6e. 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/QZNJV2432117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c92e038af363dd8ee2fdfc6354a298791b65fa3649a6948a9850dc029cb7ffb. 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/QZNJV2432118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18faec1632b4afafa10c09ad2313518a77f519e3aff18fe29ce8af95a2f13d6. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNJV2432119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a317d51aec4320de9bb6cd5df925d78bc6776fd549e33368fc01ba083e7d313. 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/QZNJV2432120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576875cb55fa43e2951b8b5478c8414183d6053f802a61fb093d282662b722f9. 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/QZNJV2432121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1c4acfcd7ab8471a994bd4619feceeaffc7bf27f27bf33483a77f5f749c371. 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/QZNJV2432122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc131d12028d39e78890c4b3df062f88073252f365fd5c921bb86f5c702d781ba. 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/QZNJV2432123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea817f85d7b2342f2fdd06df7adf57cdb99f4afbabaa33a2ddca16bfc5edaf1. 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/FRX452276104.