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 0xd694fcecbcab82a7b258a361f7874fa648594a4e51df179e39103db33ea106ab. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d69928a-9fd3-4dc3-9ad9-7f0bd8012db0.json and https://artists.proofprofile.net/proofs/artist/2d69928a-9fd3-4dc3-9ad9-7f0bd8012db0.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 0x0916903b0881fe70e931ee51a3b2069c374821595dea2d924515fd2245b135a4. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:25:44Z), 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/GBSMU8720759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013a3115d590b1fe2415e06eedee50781d0b24323a1ed203696ee4adf816502a. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GBSMU8720762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032aeaa3bc0292bf3b7ade6adb684e405620691c0eb8c05f19972adaa51c7110. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:21:27Z), 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/GBSMU8720763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622896b50d5fc2d71330448a5496639027b95ab65eee7bda1fe2d167e82d87a9. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GBSMU8720765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24463fb1ef5b1a4880ab40867e8278cc56f76ee80173f59a130f1081333694b9. 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/GBSMU8720766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772a34714cf48530fcd82717d009e7e6f67e3b14170adddf09fd19db5901ca34. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBSMU7626232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906ae71296b094f188519d1183532c06f2fd9430e3694c23889ef436abcd5b28. 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/GBSMU7626234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a93ac9c0c2b12afa9af4dcbb7b7f155775c302d6a92b2f0af49d9a0fe2961f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GX8LD2228861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b448e2ce8000b5afd545532af86400951e9b82c8d3d627d5f8da40d6ae87e0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:10:11Z), 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/GX8LD2267264.