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 0xb8b2588eb3757be18312924afea7e98cce5204d3697953751322b791dafd35ff. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c90ec426-bf6f-437e-8fb6-59491c20e3b7.json and https://artists.proofprofile.net/proofs/artist/c90ec426-bf6f-437e-8fb6-59491c20e3b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x8fc72b0d3f67bcc0073342ffd2120a46bd0619093f15617ea3d435414b495201. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:26:23Z), 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/JPI101200184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d828b4b128a6efc1a061ee09e43312f6186f8a4b1135ca8f8bbaf85245d792c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:21:49Z), 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/JPI101200186.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11090c03e7bb18be66246d29d46f66dce45ff0ae6a23b7c8e64d9d02d9d76af. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPI101800190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39201ae0ab7f13c58b4a3230963c46a2329cc66ed05be35d9924fb6ffeb250a0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPI101800184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3175842951bbd94853ecfe12852b87ce5cb4a08bc70fab03c557dd01fdd25288. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:19:26Z), 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/JPI101901478.