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 0x95c20185a539d4ddf31f1a5ef352a1b6a4f2ded30c09bab3464366159b99277f. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0087b64a-6e9c-42ac-8f1e-da7c2ba17eff.json and https://artists.proofprofile.net/proofs/artist/0087b64a-6e9c-42ac-8f1e-da7c2ba17eff.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 0xedacace707c319f98add58330fc430f9a97f998b4e3acff29bdf4bb381f7de41. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:56:52Z), 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/IL6191700610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda027264e75540dafe7351c6173e00fda38accbec0ceb3cf73b675896fe0630b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/IL6191900448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0644d86ab7407c4b73e0f822c4ad42c7dace29ac16071106b5b9c6f855adb1c7. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/IL6191900550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2c8f320e2f23e9d43ad401afb9e48ad3b305e2c83c0ff66541bb0fa3d3fb9f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:35:21Z), 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/IL6192500160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8854f41edb08b43e5ef151a0ffca9cf5f756ca5fc2bea53fffdba2416d6f59. 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/IL6192500162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bec487f8f18994ae5214e00ee55badee46b367d550d01932cb4c9542abd6be1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/IL6192501197.