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 0xa8e1abbe158ecee45c9099d18bd77003c67760bd817604f42d8d37f890019a15. 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/1be3b6a6-1525-45cc-a0fc-20a83df600ae.json and https://artists.proofprofile.net/proofs/artist/1be3b6a6-1525-45cc-a0fc-20a83df600ae.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 0xc845ed223231ca3ffa5cab8bf584f48713b78d65feef23759ec3535275301a29. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/ES44A0921101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d32e4b7af14a1c9484b65bb491272764d7823b5e1741ee496ef35b0d57b0bc. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ES44A0921102.
This is the Beginning of a Beautiful Friendship
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1612d636de5ecad6ffe3b8acb15b8f2ec03b2e70a8b6eaf7dbedc2ea2d289634. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/ES44A1021901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a443df0ed4b673dac1243573a4a7cb822753d5b1de73ffef6bae87c84031e6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES44A1021902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd5eb397aad77680a08c1ca4b5325737564cf23973d9229f283b67f7600e5e6. 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/ES44A1021903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a1ecfb8bcc1f3b288824279f8f8edc7c51177c81ea19501d5c48832eb3f2d1. 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/ES44A1021904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc558e994477f283ece95e6634f2bef0db419800b2f8187159369ce653b71dc. 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/ES44A1021906.
This is the begining of a beautiful friendship
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ab5c8bfa547cbc667fc137158a7e12b4d8ef9ac5ec4398db174cc85cf7d46d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/ES44A1123001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee7a8e3ca1738b7c9dbb00f4f2ea29089247c14e61cad4a2e04331c05670152. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES44A1123005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dc2fed3bcdff73625d091fe5580e57f982a8d7d3a31082cd6f07b988c64fd0. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ES44A1323402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f59d2da42bb41a04967712cc4306868aacd0ea98aa3f29296c36023fadc589. 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/ES44A1323409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda514e8322d5ed7d49185a47d3e93132220b26e2152824b889fc49865f0cdf5. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/ES44A1404101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe56590b1d714f719ec4ccb01063e51e68adb4b4553792780585d7bec268486e. 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/ES44A1404102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0e0bae18900fccd1ab4097a3c1500d42712de4f029c30bbea032850ce1bc41. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QMBZ91759259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc028ea7372c049619ce946f99d7f4157f08d15879c99c0236c3711a5b837d056. 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/QMFME2194243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7df9f4e7d3324791bbd2724d530fee6cf2f4e2254bc6eca724e36b7ad3d65a. 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/QMFMF2217683.