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 0x4d411c147739e6e8d5519bd102cfe8fb6e352ab75f7c99f1594cb77710170a3c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a031eb59-f32c-43c8-8d0d-00261e914c48.json and https://artists.proofprofile.net/proofs/artist/a031eb59-f32c-43c8-8d0d-00261e914c48.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 0x283560630aff24422024b038c5cb49330e0d0e55d2024b7fa6a440d3d985f2c5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE5Q52104026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa067403f3f12f65c4ebe35fe5966af3e2d51543acb44b362414ab817da6f21e1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SE5Q52103933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3b04fd1992f2c4af706c0110e2da3d07f1aa541353aa08c3507a611049cdc4. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:01:14Z), 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/SE5Q52202062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8c2e01afd570bd1f10494749e6617aff496899d2e195dfdd879ebed5f2e4fd. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/SE5Q52201556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc3f08eb8dd435811612a19231e184b5296c18a22f7123cccd30c7598b9aed9. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:19:04Z), 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/SE5Q52104374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91100630d6e063b869cb257120a4592673b80dc4b611fde3f001367b94dd0440. 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/SE5Q52201852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c2031b3d30ae9346e7e4959ec52122d3b38571d48738e699cc5fd631cab15a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:48:20Z), 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/SE5Q52301646.