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 0xa710255b6d2cff255814c75b062027380217e233872086174149a685969df05d. 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/a6b1696d-2d33-4dfa-9da2-23aaed80d876.json and https://artists.proofprofile.net/proofs/artist/a6b1696d-2d33-4dfa-9da2-23aaed80d876.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 0xea07e147ee13485f1e8820d94643ddb683f5ba17bc7b565c3dfefee4ac4ba9e8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBEUE2400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21142d1e0b61fc46fb12e8267bb32df4afd836e14c67bfcdf732ecc48a697426. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBEUE2400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a91e75d8a2fb19953ae325d09c780951c0515e97a2d82b95593a3ebb1486fd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBEUE2300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a158fee6290bbee4a02f714ae7080a4c8c8e70f26fbe2d7c51a8a79579ef182. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBEUE2400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b226316a52be679af9f911db553f2179bdcabbdb9ae432d70377b15122089f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBEUE2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c8dcba59ac24de8a928c3d1bd192d3424883b63369471b6487a74f5efe5e90. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBEUE2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40263a9f2b9ca01148e16e25a4fc247674e08a1cef25c46f612811d23740c878. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBEUE2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fda9990ec4c7911be12be9d30c780ee925c7ad27d3e1ac0f07f4d0da88423f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBEUE2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6148a20ac2ff34736210f84d1cfa6e67804c988083ae74a7de6a6a871dc58de2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBEUE2100259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e960f811c7c4e53b05b8a208ce31a5f18a2431b27832c233441d3e13724b45. 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/GBEUE2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ac3d3bb14ea615c657377d5be891051edf16293c21eac1aecb7297f89bea6b. 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/GBEUE2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a13455b199a3e7e4a02d3eb0acb3cd94946d4433647c9df29f21dd55a0c535. 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/GBEUE2100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca3e4f6713c35cda15f0182cf4ab9e50a74103bdf09ad544c02e543bdd3e7d4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBEUE2100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55ac2410d9b72eb7896e540432e30d54bdddd90f0f2023f3d7a20aa272804ac. 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/GBEUE2100097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90e2171f81f2d5be98d23f6e0d5f59d74f860824ae6c374ce703142cf052baf. 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/GBEUE2100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027f1eeec7d8dec8263de69a1060419f42acaad852787da32e7c189de03af311. 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/GBEUE2100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c12c60b3ce09e20345e42d66d1b21fde66f8672405c501eb0f710184aa6612. 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/GBEUE2100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d75cec2fbd4af2141bb48d104eac016e80d84f2ac36b2db5ba54d9a7db9ba75. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBEUE2100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a91e75d8a2fb19953ae325d09c780951c0515e97a2d82b95593a3ebb1486fd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBEUE2300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d13d5ff8dd4c16c9f28729dd4bf156fbc2912a78181e408a565e769024aeef. 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/GBMA21874156.