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 0x687d786f39471cf454b96190537137a2eb98c986f3e5f90f96e0a9ef41376be0. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/026f54ff-abb5-42c3-9a82-ca5ec136a025.json and https://artists.proofprofile.net/proofs/artist/026f54ff-abb5-42c3-9a82-ca5ec136a025.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Safe and Sound (originally by Taylor Swift and The Civil Wars)
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 0xb988e8f2899601ad94d506dcd850972fe1ec96988b71f3c6175c5c1a69abe7b1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:14Z), 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/USE830997047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73011d8271fd68e3e6c9564af990db624c150155896821ebd5659406e0a2329f. 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/USE831535244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac00679667b71fbc3e8fa9f796f3d213789465226426bba6181f8a74191f3cbe. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QM4DW1719149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978cfd80eb05939d2b4d7dbb313ba32c81cccfec5a867a25e39c83ec6e3f8765. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:51:50Z), 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/QZDA51837777.