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 0x64e3bbfc2d4bcb3b470fc558e205a782ee262d4150a5c92ea03be34ea75e9a29. 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/b95325f4-0f4a-442a-8be3-c1913e29c5a8.json and https://artists.proofprofile.net/proofs/artist/b95325f4-0f4a-442a-8be3-c1913e29c5a8.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 0x0e4a8f26316bca74103fcbcb19505b9d0eda9e7ca83edb48339b0c09c85b8a87. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:45:46Z), 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/QZHN91972776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45257de7ece86c6d0647cf0b84c60fc6d9b4f2fe47539042d1c4f7659d9d6721. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:44Z), 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/QZHN91972778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68075d46742735ee583efeed5e1c07e79b15b7c4457aec62100c14623516503c. 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/QZK6P1994156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd137c3607b38301b4d5d653a92161092eeef06ab1a1fa60807ebfec4253f12c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:47:47Z), 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/QZK6P1994159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9b6a30f245c0d532d77f3581f0635f96e40b95f18619a8c460040a25cfd386. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:23:13Z), 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/QZDA82023077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63862873c33542281e75f3c439838566279cbb736d41eb103bf72c51b6936baf. 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/QZDA82023079.