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 0x2e660304a64b34546139f6b04f518e4b2b680264de250517e1a10a5141dc6cb6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aef53119-522d-4c7f-a187-a49ab757eef6.json and https://artists.proofprofile.net/proofs/artist/aef53119-522d-4c7f-a187-a49ab757eef6.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 0x3f3245ee504c97fec43528c2f747a2c6e3e143a5df1d8f341d751380dc6db737. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GX8LE2524184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb86fe7feaed4b8e435bfb676821c390b39f2bd5cdfdfe80114ac5146ebb0cd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:55:44Z), 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/QZ5AB2383991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcd5616e89e2e5107c7baff76511d848df113f40008a3d94bb0835b41e8973e. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:38:01Z), 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/GX8LE2595277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0df4f654126af928715c3b219211fa98f2bb6bfad8115295444727252dbe50e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMZ92363709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75a54ccd2157c018fdf35e697f3a99d9664bfd4587e0dcb5b023cadb3027429. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GXESV2580669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8236f3aa8c9702b8c2aff0a7751d15c0500c984d8f9c3bbba81fdabb58397e. 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/QZNJZ2401352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77b4ed06d7ae9d767cd69b4a6902ab0a467e4c954f2c97ac7ade3419be3ca7c. 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/US7VG2506968.