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 0xe56562b684e894b55c5a35ab85c6b0bcde919449dd8230903134dc107c429cd2. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/901b29df-c0d4-4b6e-824e-3fca2b2eca20.json and https://artists.proofprofile.net/proofs/artist/901b29df-c0d4-4b6e-824e-3fca2b2eca20.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 0xcef1b58a72e9a2c040c78bb55d420838b3cd7788a3a14254feb2d32eba7a79b7. 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/GBUR61600071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90fec6e95ea0b3bd8806a346c8083bf8bb960dc0e8e8d578a1269342e611704. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBUR61600072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03d11a6de39cce845f93fe83dc53abd6d500c1b0a77b8d4da5ee36a2f40b6f9. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/GBJAJ1901555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af35a169fbc51a4186d1b344178d69498bc69fab3613a92219bf74791240916. 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/FRX202066835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402b59dd38165075c4b73da5f8290566e6abdc8833a69b9255556e53e795572f. 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/FRX202066836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a3ef451da96026b0fb6f39855f1481f8a131698e2717e51c57ed910354bc42. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CHA042000213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f64689d32112d97e6f197667b36686d1921c5ccbafc59c2b30843b0e7dc8cb7. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/CHA042000215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2516a4ebb4281cae7fa947c2fe9b0cd89165c1bd9672086d81db1d1fd25a8531. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/GBKQU2542240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52f53c1177af118266cc201154f2d5bba85ae686745c7b8d0d3cd903ee86563. 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/GBKQU2566569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c6f496419ad59ce09ecaeb962871dffc233305720c05f352557ad49d382351. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBKQU2566570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f8df1fd2bcf77a48f8f30a5f710d1c3024a6bd1e98f3c5dbb0f21f26558473. 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/GBHAD1801357.
Juliet & Romeo - Fabio Neural Dancefloor Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452d695997d69cce1d7357e44c20487a4db76470f32ce0f9637e655767b4e479. 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/FR2PA2000080.
Juliet & Romeo - Fabio Neural Underground Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5286a63f0cd301960e879a1ce662ce899d7125057adeb2c9a23e7ac61ec469e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR2PA2000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e49161b28f41db447a2323b80e5cdd55cf2c82570449a2c7f5d68e97deecc4. 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/GBJAJ1901556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd36c4af157a1b89f58f172dc5d9a1cd00f459d7ba99c19e40a053df3376cac. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CA5KR2488674.
Ibiza 2017 (Compiled by Chus & Ceballos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31a96e69346db10e40a780f5d0d514bff8df054da135fe2969a0cff5654ca97. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES7841721212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3435f79f69c4d04717ca06156d0d1677e3441e2160452fc19b157052beda30. 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/GBHAD1901323.