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 0x3769c515ff979ce3003c3b55de61f9fd2f6a0c1ccb4d05d1e172fee93cb7e006. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74fc20c3-4313-41a9-8922-a9253712b05c.json and https://artists.proofprofile.net/proofs/artist/74fc20c3-4313-41a9-8922-a9253712b05c.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 0x3a4b5ce405f702b0693718ef6b2af398561d1989f59d24211986908218ccc5ec. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM7C22100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12df9bcfaa1e8b482d195093fc847a9979d9ae13411e12593cd71da23d380d41. 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/QM7C22100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a82163b21468baf2364dadea098374667065d8768af5c57bee16c5d1146941d. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:10:23Z), 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/QM7C22100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4f87333fa582149a02317d1a7bdb5aeffa7bd6ad3421ff8566d02d5face6db. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T03:23:49Z), 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/QM7C22100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0be70c52c0f3e1bb99cf1f9507d6f357ae8aa75f5681be1ca1b3b2edaeb7adb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM7C22300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f08a12d280b3d1c629480140aee0797628de7a685819aac6696e8855141a43. 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/QM7C22300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f08a12d280b3d1c629480140aee0797628de7a685819aac6696e8855141a43. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM7C22300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580b16c3a039916bc1d8b967d964d5efcc81705bce36e44d80d4fb9540edae95. 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/QM7C22300020.