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 0x8135cd67c758018b5759383c12e0c1ac628509c2042d1e224c0c94dc529ca769. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab5dc383-991d-450d-9ecc-fc1aa8a38d9e.json and https://artists.proofprofile.net/proofs/artist/ab5dc383-991d-450d-9ecc-fc1aa8a38d9e.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 0x2dac3904b2a87e54f3f6c85f0eecb4d7b63dcb746404c0ce88ea351d5277c6b3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ATEM51920004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4996b8ed5f831b10ed4e10841fd5136184b650291f21291fb23cc4c0e23d81. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ATEM51920002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64671d18df73463ca70ecd78c9efe263a30faa1841d04170c6c38d6ac8c88eb5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ATEM51920006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5616a256b13efed35444d6b03c20b627520025b6cb0d46e3b5bd9105fcf97850. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ATEM51920008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa296a8f21896c200491d10e8b483a841dcac068dbe4a7ba6a480a817f3ce51c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ATEM51920011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb47ecca5d10e582c8f3a0aa7f8091dabfe380891451b1e997d319d210a8f99. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ATD752425702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2af858ddc272de7f5fdbad8db12af1a5814bdf77f117bc64f3849ed1c8e4176. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ATD752425703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db734ada2e996b367cfbeed7536ac5b5a00da53bc841750a23ca2a8ea54db28. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ATD752425710.
The Golden Throat Of William Preston Robertson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa256edf6d7dedbdfb305a119d23a2af2c9b8e3666bbc12a2bbc7ab5092d86d03. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ATD752425712.