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 0x576796fb68d985b95ec72245723388264d97aac94475f1499f230e8d6b536c6c. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3912ec94-ed54-41b4-9604-1e9b6c4f1ca6.json and https://artists.proofprofile.net/proofs/artist/3912ec94-ed54-41b4-9604-1e9b6c4f1ca6.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 0x2e6a976d6890f1ad91571f4ce72112c452b85cfdfc3975e725a3d24d528f2752. 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/USCGJ2540989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436d6e129014f2910d9cd1dda90a8e6013663d2b11e5c8f778e07c51b85ce6ae. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:17:10Z), 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/QT3EY2524833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1792740650474b5219945bb92e2ec991548eec1d67f65a7ad92df56a323f65. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:16Z), 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/USCGJ2540990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a854cc21af947324a76dfb54da00afa070861b747442a0948d26255fbc1cf53. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCGJ2540991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fefe86a9a6193af4d4c4fabc7ef608fa4b507062744d760bdd76ab369ba194f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USCGJ2540992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aad6609ae5f05afc2e7c020962ba5cc1d6bedf7c8cebe24731ee79175379118. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USCGJ2540993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f15680bc1c17e3f4c7213d5feb6e98e8b4ad7f6de8f90396c9402e618532e1b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USCGJ2540994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ab4e40ee87c91b70ee06fb67113b12fc8d1c801a88cf42edc816c1785147dc. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USCGJ2540995.