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 0x5c16fbad8aaa1433913d8bb932e4b630e3444f6ae61679d3c7d42d798a745888. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5e0981e-594b-4f0e-8a0f-6f4cb651ca46.json and https://artists.proofprofile.net/proofs/artist/e5e0981e-594b-4f0e-8a0f-6f4cb651ca46.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 0xa5a9bf6b5b102168c6013de41549e6a52278c187eee35046214aff46a3cc71df. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZ5AB2061051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1ea02d1b3b46447f8f17ad3585879a278abe592f98999b99b88596078d9711. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5AB2061052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90600ca8e6cc9f315e84bd5ea5dc726042198dad753f7e748e409d597f63742. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZ5AB2061053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c591fecb92e31e66ed6bced59bbfee8319b783bf3b6a0065f5f06dac3428fc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZ5AB2061054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bd76ac0819384adde368917eee650f7e0117542f966e9b5cabe5c470de3673. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZ5AB2061056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a94b61576dca12341060876865273be67d015f16d25ec273bbb14a73bcd88da. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZ5AB2061057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba800d65a5c7384f2167cc409fce0561d6d34aa0b16f2784298b5a2eb0c43c0a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZ5AB2061058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ea0829f1959751985dae67b7ab062674f2aca68afb0a665832e0a061ea748d. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:28:40Z), 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/QZ5AB2061059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab57c60ed85f8b6048d5c35adfffd597367b9a6d3a77708e51717500053de11. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:59:06Z), 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/QZ5AB2061060.