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 0x2ed33515d924352126e9dc4ad03c7f45b69bfe8b63935606f69d837d8aa7d4cb. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/955cbae6-ffc1-457f-aff4-d8c728bc1043.json and https://artists.proofprofile.net/proofs/artist/955cbae6-ffc1-457f-aff4-d8c728bc1043.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 0xf6067603dcaa67be2608551f16458263630265cecbbd54b8ef83cdbb96411dbb. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GX53U2098995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a833127edb4d39805d42cb37e859eb19ee5abe09f680b8a6d12559c9b1cfb5f. Chain 2 (Bitcoin): anchored in block 957692 (2026-07-12T10:37:51Z), 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/GX53U2099000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175a5e155c0cb6a6ec8e2f8f3bcf65a072f53159486db935fa9464add0a8a133. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:57:12Z), 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/QZDA62007980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b2ad55f3eb8c7bf57dfc2fc54a4916d865451a660b3fd79d05cf19c01268d9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBLFP2348416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52a714cca4a73631d42fefeb5eaabfdd7e4af5f6c6e351417f35820c69aeb9c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UKXN22463380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f5ec90e8b1c05a9763e0c0a98fd7c548be9153ae7c9358d211c75a0293808c. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBMA22451222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6223058271b4be2747c17e1ea317fc6369e8dd5dbc6d6917ba8e3df138ef60a4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GX53U2403862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3027bcd0d501aae8dd0692cdab36cfad95bd0cb32146ed5539b048de125c82. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GX53U2403863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247cfc1f02e91d0e09d3252f3f33cdc27ad13a1626709335f1b1ac677d33e72e. 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/GBMA22533751.