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 0x0bc227b033330901cf737a39004af6e7ce15c1b57dd1644259c3ba33c10db33e. 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/48ea4118-3596-49a0-86dd-12bb1f9da244.json and https://artists.proofprofile.net/proofs/artist/48ea4118-3596-49a0-86dd-12bb1f9da244.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 0xf64149e451ddb258c5ffb56cfbb547c6f1f44e6afd7749b3efcbf9b816fa6071. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:32:57Z), 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/SE9822062549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9d4bd667e32541809b8b4499ae9f2e43a45ddb77666346321cf012315da8b8. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/SE9822062553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f098abce663d619a2ce1cbb33a5da3da901a7ab48b119dd99d0cdc076128c0c. 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/SE9822062555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde973d5e1c0ede872b775ebd6c0204380675ff201469e4118a64f8d8b64224e0. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/SE9822062552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d3336b69ad7e0d4ebe175aae9149ee576cff484ff9e282a3dca28f16b99b48. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:25:34Z), 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/FR10S1525117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd886426eac298d8c52bb0efe4f67c43640cd1ed97ec4024657e7d998b34870c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FR10S1525121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092fba3230212063a684e9fe803b15700c6436d0661568ca06ae539f27d23cd2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR10S1525123.