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 0x46733df82d7f9f806a02079c020782d807102a93ac3de75c43eaf0fce99c4b38. 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/f67847ea-a63b-4e55-ae4d-b8c01895539c.json and https://artists.proofprofile.net/proofs/artist/f67847ea-a63b-4e55-ae4d-b8c01895539c.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 0x15c90e833791a11ba915ba3a4a7329ea49a755f18c2fe8d68ca4abb6d73ecb79. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFH2334623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd946b04b9b56c5e043c7c338c320e5b82bb90dcaa14a249b0b13209c468903a7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAS2305530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9d2d083b10aa9cd82014fdc8cad47e3b017679ef8edf471278fd7ee24c84a9. 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/QZMEQ2313385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bcb59fcd6c5e407acf66f98d12af913bd64d0ef2975a8e0342866d4c195058. 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/QZHNC2352841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea66fef41218055a03c4f60db6f5fcbec516f7f842ffb7ff1a353191599af0f. 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/QZDA62385049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587ca4cf1976634a1176040b3ee1f38a5c1050b1d610f322c6dc4a422fb4b289. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB92286381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651cedda584b9c6ec4b42743a490a4181fdf6a0c3e0758143d9ed908aad703ed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6G2204459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a98459638bb74926da35c5cc8e21aaecb362db071b808484415ae048d6d450. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6L2220768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec4c564bd77d3adf2a78152706f79bbcba5a6753058e8b71ac5f749edd6c6e7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ7X2478707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e20fa93780ac1b4597339c9c54f41c7c1120c22fbf7e422e5795c1644012c57. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFJ2417435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d270b85f10b9d59be89c782d3c2e13a5a01601e756a6a71118702b56cdfb83b. 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/QZWFF2449914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1aa02e7d61cb442da01abf391e54a01429aaf47b39cbcced05ffd5c33a92e0a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFF2449915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909eec3a358f12bd8d1ae2482dc5a50a9e286744d862169b87ddeb1251bd6881. 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/QZWFF2449916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2216f7b21737f7208643a044ca95c9b7d8a25bad24fe9a478ecda490d52d5aaf. 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/QZTB82448368.