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 0x3839032c20844987df1b366a4908b43a1fc69ff035ec400ff634e42ffa5b7462. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de5ca4e6-4571-479d-aa91-cc3ed89b7529.json and https://artists.proofprofile.net/proofs/artist/de5ca4e6-4571-479d-aa91-cc3ed89b7529.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 0x36e00d1f0069c0be8d2926ee70daae49bb30d4e529c7a420455d0a9cda8809e6. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QM42K1853987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604ec9366adf4b3a93c54ef5977d99703d58181f1f337ba8c7ebdb28bb244590. 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/QM42K1890363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bae33dcc3306af185ea5edad47cc72e3f363a38f0fcf8d5f0a1ab5e546c38c7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHNC1921743.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1339684d0fb92fe58129571b25e9fc767a9f3b042de00eae1de0be8daa302b0e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:59:15Z), 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/SE6TI2108103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb174887f26a06d91ad1dd23e1b1393887ff54aae298fae5f1da962ced582226. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/ZZOPM2115625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49be32713b54d0261c382ba5ed26c370580d65dc26b1ab6931fb97dd03d6e6f7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZHN52235751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f158f8ab9abab87c195641cd282de7faeb4c375d563ad61c72c2d61dc0d1fd. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USANG2202694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f158f8ab9abab87c195641cd282de7faeb4c375d563ad61c72c2d61dc0d1fd. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USANG2202694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54050929f027f645c55f5fe6f1a201913b9b1c5b236880416da1efaa910b19a5. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEQ022390155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c92540ffaea15ed1fd762993261f9919c59487f4fa5444c07413281f0eab59. 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/CH7812405017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d21d2d1bc01e26c83595864a005212d18bbb79eada3bb2193786355da982b84. 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/FR9Z62400722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c17e63a418163351ecdd12a65d4bf8349c7b0a604ce7063c811f221dc9ed4fe. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/FR10S2509147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a29236641b6432c717864e466c2b4e540ad966695f2a0ddf44f4cf0bafb9ae8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CH7812529235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07e926e5211b4b9dc9a8f0ec9ef493825f6c26701ff710ac816f079372047f5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CH7812529236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebace431678d3ccf2fd732965124b8eac77c48cf0a975501ad64f86521c7beb0. 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/DEQ022284133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce18fe13e8cbd458cf40d4039da393ce05bf2d352a26aa684bcc119df1b2167. 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/DEQ022284134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64028af0f5abf43243345c708cc3fbc686149d754ffecf08cf4b8a95dc09ad7. 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/DEQ022284136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7ad6514270c8dd43222da2190177a963303db45e5c3aa0542efef0c5533872. 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/DEQ022284139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f7078c244a47036664434de40e6b37479a737ec3834ef2083084d44da0abd2. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:27:06Z), 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/DEQ022284138.
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 0x6eec94c050b5cd87681461ffdf3292e95010c1b5288d59301dff0c31738a941b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEQ022284135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3745ca7db753f0e329987eda23512ba7f3971baab8e854ec732581fc37d3301c. 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/DEQ022284137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a133accaca46871daafd06421e60b8c149e5033423397e353d26db1ad0e4222. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEQ022284140.