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 0x58872c250035663f4a39ca782cd2a9fd9d4293b020839062ae48935de84d62f6. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4eafaf16-794f-4d47-8860-b3a08b73887b.json and https://artists.proofprofile.net/proofs/artist/4eafaf16-794f-4d47-8860-b3a08b73887b.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 0x91b71dd1919f4d6d8a3469069e4511208b4ec5fba33935ab286eaa9edf31f366. 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/CAE562018701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7da50a4cb5a4d3c771d5cdef5fd7de68c4f5fdfa6559830431612cd0b8bff1b. 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/CAE562018702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519e88b0c30864acb5ab1919d4f5e4139af40df066763f8536deaec50bf3dc86. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/CAE562018703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da55ae0f4a2909b2fd3e1a11891b94b0d5030074906b28d3a545e59f705ae2c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:56:50Z), 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/CAE562018704.
Tour de piste (DJ UNPIER & Kenan Belzner Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feb3ea16aa321e14bf6789188bdc71bdb38ff2bcdce9975d32124de9f3c0a8a. 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/CAE562226501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd209226b7e7ba4659a2b5a85d697849ae08c93cbf7a37e56782e6604c4e15c90. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CAE562226502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2526a6511293187a0c279815ebdaf7848bf8b5d41eff1fc6f9e6110dd14b25e5. 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/CAE562226503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892729d9a658a7fc011ddd1c7c7f8ab5b15181187f111ea1ae297a013ad46093. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CAE562226504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78c43a31ea75049333a2b3030d4c4bc1fd2affca958130e947057ca7609b4dc. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CAE562226505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf3575a375b3736d702e787d37d884d6fe98d1d0a963630ace41a1e97739a5c. 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/CAE562226507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cd1bb194da3c0f8e1c3bd5a19bfb0149482ddf9a5c532222d74f0267393817. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/CAE562433303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8367202ab49af6e2c52a286227639845f301ed93a08884e98958f5d37c3f5567. 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/CAE562433302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd891c90940d57f7365a4dacfc6427de0089840318058a05e1165e487b65c8f10. 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/CAE562433304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd283f575c8c9d196afa5be0555c9cfcc1f287ba340d219b6d88d5e83d353276f. 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/CAE562433301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81f207de0beb33b571acc9ebffd511a269d34fa678d6ca6805e9924f07a43b9. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/CAE562433305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4282e73b7e43655874ac0605637978609643535c681f8ad0a901798b38b5bb6. 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/CAE562433306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7be297429cb5e7b31c2833cc07fd19ded2516564d4b14be438ee90acf3d3937. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CAE562433307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a9df19ec753c98348eac3d802cac3b1038270b637e1a2c47a5abf96c5e78af. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/CAE562125702.