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 0xed6485ea2f8662094b10d78fd4241228d082c60037793cff0daab6f37e4a6a43. 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/b0b4a964-5aa7-4fff-b47f-0a06c69e4ba4.json and https://artists.proofprofile.net/proofs/artist/b0b4a964-5aa7-4fff-b47f-0a06c69e4ba4.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 0xc9ebe345cf8483b352fcb3bcf4366bf106516aa670fd9f704cbcf0e11926061b. 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/QZTAW2490682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd046d6837c9db3a67ee82d605490a2e53ad4ac906c51c0e3da62ce2529e9ebf6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAW2490684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9418d7fa06ec13456f6101bf2adc01bec7f339d0d4840f11631e246fa18abdf8. 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/QZTAW2490685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddccaa3f07d406c18cf18650e27478aa613fcc3467fdd0f9d5274f53f70a21b. 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/QZTAW2490687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5d63919934aa045764ffd666fd2a0694fb4a62a85a174ff20a5f9a0d5a89e5. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:20:13Z), 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/QZWFN2481774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c67d56b10f35c181ae7a841d16f17739c098c3b4c0df5d3534601c02beb7b4f. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QT3EZ2497910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f1447d15da897a99d267a5bb47e7d386478ccfcac6c6673d7b135571f56ccc. 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/QZHN72588852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015e16e6e562589879c839d4b4938fd7a4b9ae0eaae4889cfea701ab4d313a30. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWX2511911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7830fac7d1d6acfaeffca9cac04a19f31d62fc0c37a70a1af3dc40a8a3936e2. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/SIC032500169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa9252be5a09641b8a03d5f02058d6c870da3318106c619cbeb4aa45f9b2721. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F72530485.