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 0x2041d2d03e29e9904f34b49e49994afd30cda5d4e500f9bcca0c334761dbe547. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12d5eedc-28f0-49b0-bd01-5c44eee88a1c.json and https://artists.proofprofile.net/proofs/artist/12d5eedc-28f0-49b0-bd01-5c44eee88a1c.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 0xa85ab9eedc97868c6a4eae5f46c14b82c32699e35ff5c9afc552e156cd66e531. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/JPZ921807919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c62efec21c6d8b4b463e5f90390d4ea684275d1509693acaba1b4c977efcc57. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/JPZ921807920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4ed5a06e09290b232b380631311da3a5f97deef6c263d78de4a8344cf78ba8. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/JPZ921807921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bebb83cbe1a194f8b93b4f877e25c50645f6f8b4678dcddc783209a2e55057. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JPZ921807922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1be213ca70aa4d1e5c2c3277382845ac902fbcb71b71bbc2afa565fd69ce6c4. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:41:37Z), 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/JPZ921807923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b0e6f89e88713711965fc9ac78ea9dd309620c7c78f641ccb054c8e36f3c28. 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/JPZ921807924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa818a1f1ac63f0bc8a4d3f1df79c5f9515d0ba0635c705ef78ca8895d5991b51. 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/JPB601884215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42991f46936bd27867e592d8515a3acb36d63c516ba8c7edcb056df4020891a. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/JPB601888592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf09df59c841cb18e3c736ca347cea0f5e534d7de1e8408db773b000200d818. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/JPB601888594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ead752193048d3cb1d2a839ded0f9796e40bbec19d004066da625f57623d0cb. 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/JPB601888598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30f5914faca09e453f88008db12996aa3f50a5239362898a14157a47147cc68. 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/JPB601888602.