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 0xb1a95e8f3de77067428ae075683b5afb73616e8f1df5f66b44b00de68ddc3d29. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/156bafe5-f4d6-45fc-9feb-7872b9963bb1.json and https://artists.proofprofile.net/proofs/artist/156bafe5-f4d6-45fc-9feb-7872b9963bb1.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 0x80f69b6552523f863671fcd7b22a300d7b1cfa24216878e7214c2a2d0b42011e. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QT3EY2485646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956220057c7c3b83b8633727ff5eee5e5564544351c89df720934dc6adad4925. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZDA62577502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6266a3a8cfd438b0e016e5d8c03bece8b600757f75b6836fab55f16fcac7ddd. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:04:01Z), 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/QZDA62577503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20b120b708e1c1710cf9d0f2b814e66efe8c1bb0bdddec9c486db184132f116. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBC2491651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f69b6552523f863671fcd7b22a300d7b1cfa24216878e7214c2a2d0b42011e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3EY2485646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd788d2f7d1b0644580710a1ee8c9d589e7ff0df9de89d0a47e152dc965d74ad. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:38:17Z), 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/NO7JB2507050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd3056dcd3249fc8d970618913467026d3bab57a9df2fa8b721bb355922fff5. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/NO7JB2503030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ea646bb8ea690cc0b24645f0cade275f41bee386a2f82fe39c310187476305. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NO7JB2518050.