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 0x9d54af1017561e988dbfa3180f2ba4e8e16cb4679df02c855e276ab4fd00916d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26c4d1f3-97fd-4651-96ed-63809e137a69.json and https://artists.proofprofile.net/proofs/artist/26c4d1f3-97fd-4651-96ed-63809e137a69.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 0xd36e248efcb6e6c477a60377564c2cdd303f1827057d512607b67724d620fd69. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USHM82031744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52adc74bb8e564ff4717e07012a0c62d942017f2a62658cbd092d889631ad188. 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/FR9Z62101128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4145f2e47774375a19fd3f7cd78b1bfb4d84a1d2887e457885b3701d77c08c73. 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/FR9Z62101129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d0a51784e27de1f3b24076ff0378760d8cafe6f121728c2f19cd378fa30116. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZ5FN2489005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135810f59f49809d4993646c4684bb1103c3bb17f229ce1f5f65ea259daad62b. 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/QZWDD2301638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a322342a360a801842d9e70308778e569ced9fa800bf8b2d8a7bfc2411f93e1. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:25Z), 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/QZ5FN2489031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acc5480418d4b20703c99e439adbf87abbe12276831fcb04eb732186ba7ebb9. 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/QZZ8B2379706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc76abb0954a95266802baeb5ca9a1a21d57c3584b5592eaf4d54b716517e4f9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:07:58Z), 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/QZTV32448055.