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 0x888f6151b30ca98850715fb876ae7fdbec1a4b8fa0ead75fdfa2ceb1e7a83c7d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ab7e452-bb54-4690-82a0-5c5d783f22cd.json and https://artists.proofprofile.net/proofs/artist/4ab7e452-bb54-4690-82a0-5c5d783f22cd.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 0xaae4d1759e7359a1d65bbd94bbdd41210abd7311f2ae31351e5076c62b3d2538. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GBCVZ1500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3330cb7723b81f8baba437b54b31691d073402f3de7da350e75a0a40dd3827cd. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBCVZ1500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f20394e3b38fbc1105ee70a9c6faaa0d0ca0405459d4eda06b6022cfaae0a0. 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/GBCVZ1500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8682abb3245547445c39e3071bee4305896126f957b2edecab8637ccc772ab0. 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/GBCVZ1500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1dc3d4f0d08c7437ed7b5816941563696bfdf3145932488e37b8d99c36c8dd. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBCVZ1500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b5a54709f3d2ae3ebe8b525615dbd13db4fa358531682452872c97d19bb472. 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/GBCVZ1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710d9f850c7efd7b421f5e42354a64dff2701b053ebeb23e20748ea636601980. 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/GB2DY2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20a5ab3241848c29caf04fab98bf9a9b3cc2343bd36a0d295b200a565ce07a9. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/GB2DY2100578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d34a925bacccfc62887f907bbd50a9de1f19115c87c0ff8f5f3a62d964d744. 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/GB2DY2100795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20a5ab3241848c29caf04fab98bf9a9b3cc2343bd36a0d295b200a565ce07a9. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/GB2DY2100578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe4c323acacc01428c4340d58c75e14117f3531b868e8ff5361eb2663e52f5d. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/GB2DY2100579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033915851e4d83b196e16579abf68902868758e11f49ab048027ebd4fa1538b8. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GB2DY2100636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf14eb7e09f8ec35f4f90f93947f4def7523f64afc0252a4e76248b0069cf700. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/GB2DY2100596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d34a925bacccfc62887f907bbd50a9de1f19115c87c0ff8f5f3a62d964d744. 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/GB2DY2100795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe371292aaddaff2a39e532ad5e21fb24397927be48dd16ed4b431b9e9d647d. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/UK9AV2300577.
Hands Down - Trentemøller’s Blissed Out Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d2e1322bc62c9b7dc9331ed6356b8bfb6854b18bcc19fbfed34f921cf2954b. 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/DEL021770040.