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 0xbef8bcb8393f3fb6a7f4702c25c807ee19661827ee91ca46a425c46c7a84685f. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f843481b-b06d-43a2-93d7-fc3cefcfce33.json and https://artists.proofprofile.net/proofs/artist/f843481b-b06d-43a2-93d7-fc3cefcfce33.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 0xf3a776e62427dcc556db350c06fce5a261c6f5919de170b4be95de9f788fa1f3. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCACE1552612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bf9aecd5b3e32267f8d8aa7bb0eb31393af2c45f93108e58064dfc0e9e6b87. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCACE1582559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4610193fc9b8ca25cd5335153675be3b0ec50056d30ae3c73338e8acbc9560. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:04:51Z), 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/TCACE1582562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e7afcef2a6cc72ed279f5bf94e64d752bdfe67df921208d93c83e4f383ef5b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:34:48Z), 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/TCACE1582570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac287511c2e70e8337e184e7c94bf1767f5a35d3083a3021b8b066bdd941d67. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:53:54Z), 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/TCAHH2324487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b836f9e931d2ab7e2e6f84448af238f44feea40acad1c25011337caa031851. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/TCAHH2324494.