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 0xfb408414d0a474d62588415adec4de566a6233880a4ab49db85b5adece24d454. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f838745b-f24c-4df3-b9a2-2cb11f1b2960.json and https://artists.proofprofile.net/proofs/artist/f838745b-f24c-4df3-b9a2-2cb11f1b2960.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 0xfea4bba7019ca9770f0c08f7066e672105b8731a67f86fa94dde7b2f310f3805. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZTB52472619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1f0f87c32a85d977bfab1c9ab09c99c0642032eeb466cf1c872465b236a1c3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:56Z), 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/QZTB52472620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18df6997ac7a68bd6f43cbd73d1513ad8ecfbed4322c8e7ac2b08bc9fcb85999. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:06:29Z), 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/QZTB52472621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da777f81997be4c67aa649c769427f421b4361a2c2638bf6ff012b2b529781f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB52472622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f0c4daf6fbd72f356a6bf2501aaf2fa047d90a002398bc868d13f65782438f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTB52472623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b37efac7bd500ee63c2c5f88aef8edbfef72f04529be7bee712f5017a3d2f8. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZTB52472624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7632798ada88122a7eeeb1b8dd80cdf8753d1f94b9adbc8a43e9ca50231e91e5. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTB32592525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e5fb3e9cda48adc99ab30f6e067dd19e26a7d2bab1c97c24615576a0c7203e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7P2523684.