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 0xadee88ce4a95d287770d07530b1c196fcec77aaef070302ee1d1a2984700dd8e. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd6883d4-2535-40ed-a081-4a9f8785d275.json and https://artists.proofprofile.net/proofs/artist/cd6883d4-2535-40ed-a081-4a9f8785d275.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 0x543a95ba0f6cf2e91b42d575c2657d2408cf35e4e3f9368ffdea9d1948cdab41. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NL5UZ2504826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e770d527f87e62b58798248861f0ca3e2c2f74407ef21d2d20a04dabc0a9612. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/NL5UZ2504827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec835d5cf63989b58d1d8eca2f2fc997953bbc4dddc729e505295cfc1774575e. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/NL5UZ2504828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd290889c7eea3130781996b7fcd934bc8bff26bab230e9dd77cfde7547d74acf. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NL5UZ2504829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657f5da92964e1dd7f1b4523ef3f5e76ba2c379b1ecaf5a81a058e8b38e174cc. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NL5UZ2504830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac02d92d23d3f039b30b286041cffed7266c0ceb10fcb9f8b6f42812fde6c8be. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/NL5UZ2504831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0599606d7a8104ed28603c15aefcb16d2fbf18b2b518b58c0970a4cee16a35. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NL5UZ2514398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd915fafde5cba0d8a469c99c378b09321b9ee2463c0af299cb73a7372019cba4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NL5UZ2514399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90afe124a2a7c4ca355e6d4246b63c0c41b27d9e3b141620d59744693784abf0. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/NL5UZ2514400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194fe6b256ea2d54b8904b9179a693c5eee2ec9c7c4144e264ff946c267aa32a. 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/NL5UZ2514401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce9263b98ebd4fae53d9906971f464c0f6558dbbd3fb752f632ab899e2d9cad. 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/NL5UZ2514402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc854abfecbccc0c69918ba417c325ac2ba8b466b526597c2c556c3b8c7208156. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NL5UZ2514403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd162a295226f6b02d475417fd053b061f56d0334c37a742a42ac6ce691b08906. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NL5UZ2514404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc313654cd3479f6cf0e74eba38ce3e2270ec1333b95131155e3827e800782e3. 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/NL5UZ2514405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821548f53c85228c3707259f62ccb019416b02603c2dc41b83902c6cf9d0d84c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:16:26Z), 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/NL5UZ2514406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3b0235e1a0249e28cc78de7ca5f31f1d0e0dadf48e588c0ff4ab528c1d1877. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX53U2600835.