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 0x4141682364c60a3ae02fb9a3ae77b2bf7eddb356d477b0d3b80c4634efd13d91. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cad7b49a-30ad-4a8f-bac5-d97413bcd940.json and https://artists.proofprofile.net/proofs/artist/cad7b49a-30ad-4a8f-bac5-d97413bcd940.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 0x67566f4e8dbec7252dc08dd268006e90a84f71f79497b4806475357390f036d9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BAA052007547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04c26ad9ca30ca3cb0487d319f57ea705efe814f15edb66ff027234d1dbb807. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BAA052010979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c82914a399b620af3cba1ec1c894db779b6b9e8fabb2363a79eac4f7d96775d. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/BAA052335103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62a514b2abe93a29989b5746f60e6e757ee46ea75f027b7b9fe5a1340e2bce0. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:33:47Z), 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/BAA052335380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300bfc841a8d7a3699aac7727aa96d1ef178462868f67117f7a6bc9f5a2d3ab3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BAA052442483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd329e5c018c876a5dfe53b0b0385eef2adaf5d74bcb0bfbd24ef56deae2bb115. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:01:23Z), 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/BAA052446941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678e364522558040935bc18a99a48b1cfca74b105a66cbfdbdb07be07317142d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BAA052547841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a6099fa7537264ef703d94a8f4b5a96c0580989f16e398d2158c3bc96d7e2a. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/BAA052549196.