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 0xa78a0880b018de479c0223e60726acaf7679050e57d4db4dd95334cd6cdafe82. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0be7b326-298a-44ef-96d7-5601d6a93989.json and https://artists.proofprofile.net/proofs/artist/0be7b326-298a-44ef-96d7-5601d6a93989.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 0x2dc374556da67fcdaee63ad1cd0a8ee9e0975a9464cf00222a550d6b0c2449f0. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZNJX2263807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3a6f534cd809c70dcd59b00751a157b7203ade57457c81b4bd4394673fcab3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMZ92394105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c2c25e8701f43a6cdf1784e40b349bd2239ebd2c693e770dbe645906018b9c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMZ92394106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4e97060167137be61ad5617a63e7bf7a1d09ace377670365d3a9248c6425d9. 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/QZW9K2370261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6393e0c09a067fb7472304de9469cd3f92fb7c14d2e12a5f8ad441b44f3838. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:39Z), 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/QZMZ92474197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2f64acc4fdeef480531c293b0e8ce1710b866dc5923537b897ab87b10b0b5d. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:24:09Z), 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/QZNJV2415154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a6b001d1c3ee27c5add7084d7595911f00a60cd6cf18b8e57dd0a656337869. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNJX2489435.