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 0x572baef21a535442d819509b014c4d83a33efbcf20820bac6fe68f4d531ef534. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6de404f3-47e8-49f8-99f9-0f061cee1ea8.json and https://artists.proofprofile.net/proofs/artist/6de404f3-47e8-49f8-99f9-0f061cee1ea8.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 0xbd347ca64d35e26efc6ca6a13619532c1bfb6f93c97584418d99032e1769fcfc. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:21:41Z), 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/TCAGF2267080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d2bf173159960586f7af1e94daacc8ed05731bd52cf6a0a5d36fbd2846d3ed. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:58:24Z), 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/QZDA52408667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888460540577688270f6464cb3eae4293d4bd8917dca22934d3b20c3177993d2. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:36:20Z), 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/QZMER2410010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e813ba6e76f01230b2a46fec218611a4069dbf180bc1f571fedc0d8eb0ba6b. 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/QZPLR2405832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6cac3a90cacc55ea2d26221547c719aae2551348c450f3c89a012c057b953d. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZPLR2405834.