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 0xd9df6c417ac72fc632006f2e293944dda9f133972c43746acb6afd967364d6e7. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/905bc785-45ab-46b8-a38e-81f46ce76b3d.json and https://artists.proofprofile.net/proofs/artist/905bc785-45ab-46b8-a38e-81f46ce76b3d.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 0xe1bf089e5fe19749689b34306dc64d16e4e8165c5080a869507d5de8e1863c6e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:38:26Z), 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/AEA750800049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8646a736b12d6af61c491ab7d53249b8eb978fe3c2e26ce4b3808358d40836d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/AEA750900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9b39902ad591e464f5edc100d7a0ec8a097bafc38a383f5482e58cc23715a0. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/AEA750900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9fb82f60e8f806d47f2f48eb45397bc848730864fe0461a372d24cb99ff5c0. 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/AEA750900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c978d1f2487f3759ebb37c339c2fd3ba9594715a002267bdb81f5f901907da5. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:35:03Z), 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/AEA751100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31401f91569a1dbf288f831e3277d7343f50c17e755ed21431d5ee852ccbf70. 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/AEA751100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29129e9e95b85ff69d7f72d88fc09102ed44c928224cdb2574ce656b7217f96b. 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/FR59R1597949.