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 0xdf47fc4afc83e84bb433f5db5131885a5b4b1d53a681b46090998e06065461c1. 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/f10b62c3-7348-4391-8604-f5732edccbe7.json and https://artists.proofprofile.net/proofs/artist/f10b62c3-7348-4391-8604-f5732edccbe7.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 0xb862d3a9711d3a6366873a9cf18b7f9cc2729b4782fced7ab52c0c074a85e988. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:45:20Z), 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/FRPHZ1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82cbf516bed333e6d031d56ee713ef19717fa4a3123413aea53cf760ea43a6e. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:05:24Z), 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/FR0A21718000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5d633a4a2436136bf012be29679f3f969f3caeb4bda6b0d7ef631473b134ce. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRU781718010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a9669eec4a34acd041494ebf7b014e5237ed86b9d8929771610607cfe00d29. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCADM1825227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1b37d83e608aa790e8dbc0198d8c23585b4ffe99ee0e3de73e086367e1453b. 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/TCADM1814649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4f99cb4da86e026f7701c4d2d24d962eda3211e3537cc4fdc0280a841d432d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCADX1836635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5027d84c0bd62bb701511efe2e733aedd764a5a95d1fa297bdba8a0ee0fe68d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAEO1909626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755a030004276435ab879c9322df4a375a68067cc788c024d3467994b0e77684. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/FRZ042200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270fb620afee3fa047e4d22ea95378bd33a835f742f5f3c0cfef0c8bf8591d3e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:01:25Z), 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/FRZ042200539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b5254e14663b0845391644e12101d9ac0ac61346d765d071124934a4772ec6. 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/FRZ042200831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8ab2c0027f00fa731c00233b22ff213770a275ae7975fdef46cd7b143b35ec. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:54:22Z), 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/FRZ042300690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa204491ad24b4edd809e407b9873dd4207b0e0c8076814c1acb4aa6adfce30. 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/FRZ042300692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5e92176ebbcd999b8e582588ed28ca4f5e5770026d59ca4fc9ff49834ddb98. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:48:35Z), 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/FRZ042400357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f43b8faad7f470017eb4b01dab9e4dfe251fedb9d4f6ad7edd8d2d622f7bfd. 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/TCAJY2541518.
Tout donner (feat. Alexy Large) - Guillaume Barbier Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163a76889d61b4bfee6f50b762157f1e42d730ac5071d2622049d85cc687669a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR5Q72299004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c74c166841a50c6f3948d66c491e028269098deb68961d3704265691c01968. 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/FR5Q72200011.
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