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 0x735b65526a5d56c5eef67be3aefd9dd3d2b7e59c8d62498ae12ddc77b844e695. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db884273-277b-4fdd-a7dd-d368b36d0243.json and https://artists.proofprofile.net/proofs/artist/db884273-277b-4fdd-a7dd-d368b36d0243.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 0x04cc7a27dd4e6d0de23fa29417f954e2d74044caa7e60afd713fe80f2a96e930. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:34:43Z), 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/INR732000338.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26171ef822dd17007b28606560b44c020208ab7c4fb8d2944e04b222b13bbea1. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/INR732200398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2583f60a91b1ef2ecc3fd896a8fa9345c2cd9aecbb49a28372abdc4dbc6de2. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:59:21Z), 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/INR732300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9437df1cbfc42a804075f194e8969b3478f971e345ddf59d45c189971c71e7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/INR732300267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8125a2a7de1d443fabb4776f288c132a5f065a8768bc91aaefab004b1acd85f6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/INU252310371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6076548126897ddc0ff5a4749231c0be5dd02f80e0702f21b0f83cd3cb9a543. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR59R2420050.
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