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 0xd67645ab983dc418d1f50e0c718b68f856a9217072742753f36fa2c6602beab1. 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/0239235b-2760-43a9-8598-a8042679a16c.json and https://artists.proofprofile.net/proofs/artist/0239235b-2760-43a9-8598-a8042679a16c.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 0x3ba80baa68c392a5ad60a9efc2ddfbfe8ad845aa71a81e746ca91c10fc48ab1b. 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/ZAY362200772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79df0f1ba24191c3cab444bb6c436d15bc5ce71164d8a9ac932f34797c530e64. 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/ZAY362200773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee447b866ed72a8ce315664de71ef91120a456ffa9483beb8c365d8ef3d7668a. 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/ZAY362200774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5916c9a9f236b212270f29d50673518a9eea998bba5d4d703a53fd4a9376cac. 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/ZAY362200775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154a95a9d3a347259dd59277e004c5b634a2cadba2a8a2746d6400ebb8afe5e1. 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/ZAY362200776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7669b52d7327b51ae2ff1b5d246a07f33f69a4d65385a414fffe086ffdc186a9. 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/ZAY362200777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbfe297dced2a1f7f347aa616b273d9259fb214aba3e7ff58992c82a2e9fc01. 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/ZAY362200778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a66a5a1e332428566a9abb053e66a1fed663492d7633b4991dc59798635133f. 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/ZAY362200780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bea57748a1b54e7a1e41c022a0620d86e9c590e98125bd6a0941408b90419b. 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/ZAY362300885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341c0ab2531212cba49e393092a8b71c5f8bc533f859a20727eebeef7eafab1e. 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/ZA7IZ2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bea57748a1b54e7a1e41c022a0620d86e9c590e98125bd6a0941408b90419b. 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/ZAY362300885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3017c37cb87727aaa83242041606af34d89837142d43665103eb0d42d54ee38b. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/ZADTG2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bca852a1ff11676ce494741e7b2f16ff6ede5bf6fed61179cc9cfd6eb6831ab. 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/ZADTG2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e237ef993c0bf9b1ab1c41a7f0130d92a297a4efd0522e680367fb62081e05. 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/ZAY362300955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cabe4d35b2bd28542cd678f2bffa0cc54b2206e712506e9117d4910092922b. 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/ZAY362200757.