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 0x6d8d4bb99f460bb37eb39791e2b2b2574a8a6cdf4683515371461864ecb7c97a. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65e0d58e-1ca1-4b69-b871-72c15cb78093.json and https://artists.proofprofile.net/proofs/artist/65e0d58e-1ca1-4b69-b871-72c15cb78093.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 0x854ecfeefa9e6ac275bfca7020ad146d2b1d74facd5678be2a8c40209d7b455d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FRX282215034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f71003154ca6f3b2277df277d8e9ad675ac3b6c25584ef92fc76a6d879ce9dc. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:32:44Z), 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/FRX282215808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec36ab2099b462f9f024afb36afd57fa60732a6882b93e8cb4abe5fb34db697b. 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/FRX452291180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75526df681b5b2a1133770bbee14034ea18395bc6644cb6e9cebed6fce98c174. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:41:03Z), 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/QZWDW2226153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8e9e1a96c842bc92eeec6f0875ea49c8df4fb35f7182cd9065a9c5530db500. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:19:04Z), 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/SGB502423358.
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