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 0x243efeb9972a157f21c2ad274437d04a79dd3cb1ae58a107450ae7fe71028aac. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2413110-f391-4c62-b2f7-46448ae5c676.json and https://artists.proofprofile.net/proofs/artist/b2413110-f391-4c62-b2f7-46448ae5c676.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 0xa8856e9049f8d7a895db66041e84bd4f7b3b9754b5e52452f1aef0baf12bec6f. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:04:03Z), 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/USSM10801354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed92b3fe7589fa0bb2fc61a610355b8f39ffaec9248c4cfcd37186b64c095f4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USSM10801352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbca941627d4f024f58e0b5e12f21daf739862a540c07183d6bfdbf62a1d5c52. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USSM10801350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f7fe2241c40dc63f37979a679f35af44c99720c2aab3fa531f3b9a69fb1d06. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USSM10801349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1e5f1c4659b17c1939e73ecb6f90ea9b61647bc78e844d89dd5cfc95dca5df. 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/USSM10011605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dca95a472e880cd7f211bdc40672a90150346e9b18bef72a84974d8bf7e1ede. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:26:22Z), 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/QMSGD1420000.
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