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 0xd72adedaaa3ed4023ba33bd4db18e1e44bd8389d89b8968437f43e55bff198c5. 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/3597ddee-1d7b-4e50-9b97-19472b609a11.json and https://artists.proofprofile.net/proofs/artist/3597ddee-1d7b-4e50-9b97-19472b609a11.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 0xf200e40518bbd436a902566abf91064c43534f581b85b4f38056c1d40f2a7ff1. 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/ITAC21100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffef8101363465a9c747d90b452ffe8c137df3fcf3bc3a64515e6ca88a55223. 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/ITAC21100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21771ac625a6ad599e68b8ee602f448229b0d91388b474a22f07d0db3ae0fd18. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAGD2296752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdfc2f3a11c6a8f3d452119b044b3c5ecf7b2abe03e8eb50478350f2641828d. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USDHM1322846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed690682bfe0f17d06843e6c5c256a1af632e46bada0afb5c94a5598abc07e6. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USDHM1322852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0be97f7b437e019f15ccd2cb377ba4d01f339fd543ac97e673b772765600ec7. 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/USCGH1620492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15910435e767f91d0c9a6bd5cabe2a641596a9edcc4ed96038716063c06a255. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USCGH1620493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a4a3932abe625d5c8efa31701c6deeb7b5be3f347929c78101a329e30bf14b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGH1620494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef1dd501d8314fafe00b9b3cea9582395e5f848b272a9cef70d0850cde5dc7c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USCGH1620498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492b0300c1699873193439848b95b14764aaadf4cffa04fff5dbb2bb691584b8. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/NL1AP1902047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba2ecb77f489ba251dae8d4d28a9a70b41f00e777a8fa80f0e70745f7e33acc. 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/NL1AP1902049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb4d2e01effbd6e3a0bf926a69f3a3cfecce2d69273040180523a493a8c9714. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/NL1AP1902050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826ca5f43023ab8c45a986b004fe8da0ab7a0c81609725748274107ebc7d3a43. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/NL1AP1902051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c9f4643f9e3b729c7f52f29d15dab6315df45a58fc14f970e7994684cca67e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAFB2050925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa826a60bba406c88dae3885bb7ff52e60d524043e8f461af54d99b3d454569e9. 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/QZNJV2473530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27061cfcc101b543b1e00363c58e4c115fbc16a9ab4bc1995f640535efce1972. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZNJV2473533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5462594a1ff9bddd47e0d786e26f6b378bbb91ff0f093edb1689aceda5f62cc. 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/QZNJV2473534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acecedf1814708d8349cae0c228460ff69aac257471842b323eaad54bce6a50. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZNJV2473535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ac1bc340087cdb57f63e8e116d1e83a1d0e4c973292957d7f75342b3a1848a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNJV2473536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5192f5075fef43de10d937df4eb1abd45e284168e57bd3680b079cb0e80d05ea. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:04Z), 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/QZNJV2473537.
I Dance Cuban Salsa 2014 (Salsa y Timba Hits)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288c0a6a4ddf933856f132c307fc7883ed3c4ee9c04667e8accd23f665c955e0. 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/ITAC21400154.
I Dance Cuban Salsa 2015, Vol.1 (Salsa y Timba Hits)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b9797c2bc3e1d963f36d7c46ae90b5acf62c279a3d67dd753a7baadc9dd657. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:45:08Z), 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/ITAC21600001.
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