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 0x70dde3cb994b58ab9de7bfc1160d4213857d0d4846f66a49132a9644a96370c9. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7abdc7f-9d52-476c-8849-62fbaa660515.json and https://artists.proofprofile.net/proofs/artist/b7abdc7f-9d52-476c-8849-62fbaa660515.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 0x59080809460d7fe59d7ff3eeaf6041605a3ea6a0e8afe303da5d28157331d381. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/US2762202336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61f36ee341d0af5dd5dbf6a3472c636b59df98bf939b5b7ec42255a41ad45c5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US2762202337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59080809460d7fe59d7ff3eeaf6041605a3ea6a0e8afe303da5d28157331d381. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/US2762202336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17808b369ba26c9e23d57fc6b391340e2397b34496e09520048f6eba5afec3d. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/US2762405380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3edcac472c9260ad5f0be250b632246d395a9f68c816fd287215b224af98a32. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/US2762405381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e5822e21729ee40ccf54d43cc55ba1f05ae631bb9be23cc0b4e789ac172958. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:10:26Z), 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/US2762405382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14816b69388201914ca775a333c7479b0f70fa185948c151eee0f64ef3e3d4bb. 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/US2762405383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e365d85c9276f54e41d336aadd95c2d11281c333ca4ba11009651abd7635892. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/US2762404886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61f36ee341d0af5dd5dbf6a3472c636b59df98bf939b5b7ec42255a41ad45c5. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/US2762202337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c966213aac153b0a7533773f25808425909b4498c7f80160a06d7118503d2ab. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:30:25Z), 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/US2762405384.