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 0xd1f44b951ebfec05720da400005d22e32cc7723bb6eea968cce19535873d3735. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4474878d-ebff-41a3-bf72-7e2b4d8f4c73.json and https://artists.proofprofile.net/proofs/artist/4474878d-ebff-41a3-bf72-7e2b4d8f4c73.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 0x2344f9c5f6d8493d7b78963de93ed3611c232170c8b19ce0b3ff42b9d51f655b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZMER2416155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba826706868a55c6b3c59b56a504eb696f4634b3fa7a73d5a83b335179ddd77. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMER2424403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d72c850bab4603ef89273b5e4dec7af8577cd0b424a24cd47088ef5ae1e2e0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:24:43Z), 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/QZNWY2451358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69ae5f907e5d69be5b9985ba01226652d7fab86c24e9de731d3cf1479a3fd34. 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/QZPLR2469211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0ca18e40cd28cc485f5cb548b16808f1f1237196c970e89e1b41ab8e28e082. 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/QZZ7W2461019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb245f2b4aa9220fa76b69f1011ba0256e43fc30f9ec4ed39e15580b55ca9aee8. 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/QZDA82573602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483650fe83da8646f1c64dec0b7ec762a87fcc4e16db535886fee5e2dcf0ccbc. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:33:23Z), 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/QZHN82538396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6b48ab8d3fc935e4020f7571fa27aae2e1fb95da7e15bbd0c5e8db1ab60670. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FR96X2516582.