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 0xc513949bfc7b8f4fea47dd64007bd62b3517fcf5708a51fa3c289010a4aa464b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75abbf88-1f92-4666-9f71-cf7aa3c26f45.json and https://artists.proofprofile.net/proofs/artist/75abbf88-1f92-4666-9f71-cf7aa3c26f45.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 0xd29a7c89bf611aa060f9a30175e63d6a6696964be4c0b0374798e1a28a0a8452. 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/NLRD51966369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbce754a7e0ead197d0b6beffab6f49fbec9a74d54862ddc13b71bda37e81c29. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLRD51966395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6f90b003308c54c0d7f0f15254661078c625fccff4ff80e47cbc8bcacf65a8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLRD51966396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35cd294deaf4bf4721b89e3b9d29532c6fd7757364ff2da23ab367af4f682f9. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:21:47Z), 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/NLRD51966397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016d81760606d03bcd5bbc0918e2435d9fdf6ab213f9f4e54b2fc491f6d3f6d8. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/NLRD51966398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2eaea52f95d044159216ad6265f8d7ed67b38040816b4e4d481ed42f3e028f. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/NLRD51966384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bacc8090e8f0cc54cc5fa79c7e0004ef72f7bf7a585d84f0b7f7bcc311960f1. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:05:57Z), 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/NLRD51966386.