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 0x060df54aada6b8bd232ef2f5a777f1fc49c720dde9d89d306618bb7d77a800f3. 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/b45ab362-8037-4ec2-bada-6529232a083f.json and https://artists.proofprofile.net/proofs/artist/b45ab362-8037-4ec2-bada-6529232a083f.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 0xe211efd5ca6f5dd91189947257bfaab4aa4b16c3074eb6c6af80884c9dad0714. 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/US3DF2242029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e066950d60a6e24228f880d2875c4d3a861ea734798b77c332149b6e7b9fa07. 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/US3DF2242030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42e75bad1820f96689718eef375f8b3227003bad818a04113c49afc519fb06d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/US3DF2242031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614b397edbb955cd3462e618637d4291ccb2134557cb684fb552303860462241. 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/US3DF2242032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46edfb12dc58d4459f081729f02fc058434c28cd352e03a9b0a0e05181a733ec. 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/US3DF2242033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f71b28afbd405d5cfd92f81f8b5baaff67701b811963413f89ec3b5d95ae4a. 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/US3DF2242034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494165f8d0134c45977ccc5c928dd0cb5dc640ee8a02e01847751b4119052a65. 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/US3DF2242035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4630aa4fbb1bd7ae5853d46160264cc3e63170c8770dd037d974d96077412ae8. 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/US3DF2242036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2af83e4d6d67714fe22f24c2c10a2bf3b0b293ad3734bce31f3638dd35c53f0. 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/US3DF2242037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b06264a0cd12e7c7a9799f340c34b97017293c9758f998e35ba5014807cb5fd. 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/US3DF2242038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c91bdb72f466f0f40e08dd270451c14b4a39d535c9f458d7005287a36139d1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US3DF2242039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8aeae2155c3d4c1d24bdb0a5ecbbdcabeaca9ec8c0c84736dda44aa29e24d8. 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/US3DF2242040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed96eee5e8944bf1872a1ab5f6db6be468516701ea4263dd4066d039e035b9b2. 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/ES6601403822.