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 0x1edb078b710e4810e82d54e934f40419af15a8b97118ccc1c7fc62185bae0ad6. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7923f4f-c72c-419f-b351-0a4bb9946bba.json and https://artists.proofprofile.net/proofs/artist/f7923f4f-c72c-419f-b351-0a4bb9946bba.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 0x0615a3affbbe92047595f50887fdf1d0a7a6e457407e445f1023901ceda5e564. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/KSA012260387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ca031203a2db64d85fd462966df2b0a26c667aedaa0521b7e4e11d33dcb2b7. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:59:49Z), 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/KSA012260388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec41a614c5d17ad48689e3bd284763a4871f6dc4353cac3391437637a619a14. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:05:31Z), 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/KSA012260389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84e695fa0dfc94f437e8aa11b8955d6765098324e91e215951bab43b43e0329. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:48:02Z), 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/KSA012260390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976dd730d1d39dbf0485a22f9b39099c966dbafa1fb284b13cabbd57dc13e070. 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/KSA012260391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa967c80b270d77393f838211dae2e10a98fa1f933553949d6965151eae110fa1. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:08:16Z), 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/KSA012260392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402409b1a9da94ff6fc3a010b60979156893b89462c68b7c68edc53486fb8d3c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/KSA012260393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d812a7f33aef192ea9e74dd14133a764b56234d005dda34da08b784b9fe924. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/KSA012260394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce5a7d5ba101a4ccab885cf565245d6efa37c6bb52c47827266f1f2e9ea8480. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/KSA012260395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276a5e157d6ffad4c2fe6166072defd3ec9c1dafdbf7dfbd5cdc629191e4648c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/KSA012260396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bba2f68052c63e74dc76d3218cc891c54696f82ebb3c82815a08532c65cdc6. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:42:19Z), 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/KSA012260397.