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 0x21fd1f5582a93148f058609c990377f23c3822e0d1b45d2296803f15cbc2a7b2. 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/a7b0123d-325b-4eff-a8ee-ba45c4b10f48.json and https://artists.proofprofile.net/proofs/artist/a7b0123d-325b-4eff-a8ee-ba45c4b10f48.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 0x8eff1a3bcaca154767554ee96cad96a53d09a7f9b83348e3156dcec5e753670e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/MXF650700162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea3da921f6125a437611a7fd8e2fc6d18671e33fa7dcac0f944ce302e2b9c0e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/MXF650700163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c07de37cdc599c3d13b384fe8375dcc7b804cb06bb34336b39b5143540ccf57. Chain 2 (Bitcoin): anchored in block 957640 (2026-07-12T02:27:45Z), 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/MXF650700171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5679f4077f2a98c8d9998ae5f428150440dcc6f7200c0fe40326c9c0faa7def8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/MXF650700170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f33b567578f7797685c650d83a48d9407a5830c291fba83498b1429711bcdf1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/MXF650700164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68628d5759fb7598e8e152d34a7255b2fdb892af3bc5c3db44c172ac7cf5bf6b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/MXF650700166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6ed54fff9db38ddc99f4cdc0086dbb10f05781093c0280fcce1acb3e1a4b14. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:54:17Z), 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/MXF650700169.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df1d6c6c75e1c2b90540acebb21aeada372e51f1b4c638ffd06723283b4037c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MXD782400811.