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 0x6821e85f3ae83d95408d3db0ca4f74c07f6e0fc735618f443dec24391632e2da. 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/dd3f3310-880b-423b-91e5-5eff8beb46ed.json and https://artists.proofprofile.net/proofs/artist/dd3f3310-880b-423b-91e5-5eff8beb46ed.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 0x1ad67732da4b1c89d1de3453452bc62209416839b1cbadfd97a8e42953405e23. 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/CH3771700200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbffaec4670bccfffd0f84e413af10974daf21abf707c6575afec0d2e66d7666. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CH3771700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc65f035bf974338e4c400e8d66b74f2bae791ff7569b25f5c8962c0a8b6a96b. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/CH3771700202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b25b606baeaa556c022bdadf39f8cb59f395c3d5649c6dfd4b380a6801d39a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/CH3771700206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefa7614e7a0c358abfcf1d3d662b8d848f279ef82af8b12622b6d07497290b3. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/CH3771700207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd644b25df49020ddc531a6e6b41185da7bd2c6ebf3d05e9f902f982ba0d452. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CH3771800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20429c7834cc683358b078e46c315c4ea84ec59aec1340d9339fd9c6a65140aa. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CH3772000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bef4f85028572c881a9cbdb5adeef8722adbeffbf1db8805fc00027d606fac7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CH3772000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd965f65c4bef064dc714c464c89cc0698c5f137fe1480001a3720f282a6f9db7. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/CH3772000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e8693808c3d389c70fd9e5872f46d77504831bd02369dd860f4d3672101420. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/CH3771900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed54d1f7af29ff964acfd3d97621d2e1c68b820b1f1e1ac8cc0bb1487e30703a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/CH3772000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7e302c3393abd7ebc186c06c378eef992da6a441e770bcf2c79d0ff11296cb. 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/CH3772000004.
On se prenait dans les bras - Bonus covid
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c52e8dc20828d096b7ba0bb52adb5833d2e167fe7492a91714a1e156da4e98. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/CH3772000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94a0d442020094ef0db8b24676c5c7b4b872ad96a4167b76a9553a878fbdf07. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/CH3772300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81b9cd3348a9efc5bc1385190fcf72883a1fbea1319d414e025880b6f60d209. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/CH3772300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34febb6375e2be658f441892f7492a42319ef398178a040100da6a103f29ce08. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CH3772300077.
C'est un Art - Liberté - Voix de Paul Éluard
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a451439786ffbcbd4e266bdf846603360b52a923633b36144f1e68b16b5a25. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/CH3772300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422a7aa50c20ac79c18392721f0551c60a5cfbe3227319eb87510e0dca9b1523. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CH3772300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491be3d5ba8d565a25ea7581f06c3f46fcccff6c10a25015ce22e35328a22201. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/CH3772300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe14e0f1911aa2139fde9f876d07b4fbdf078800560e01226379e643ae6c559. 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/CH3772300082.
Bâton Vanille - Réédition avec orchestre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bc331c574954f52ad4804283199e7e5fa3be2b318dd7d65363cc6f453a8aa8. 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/CH3772300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d79a670c9c1f0920d2cf73243343aa1a7f3be7ee508eaf21ae9147f4365ffd. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CH3772300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1af733523743ca75d329fa124a20d5c0e8ce2ccc7316b67910576e1c34417a4. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/CH3772300086.