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 0xaa294b68e6a90ec3df49325542ae2ad2f8946754083d86840be8b18630df02ba. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc5ea0b7-10ba-4a6a-8149-3271c8238c3b.json and https://artists.proofprofile.net/proofs/artist/cc5ea0b7-10ba-4a6a-8149-3271c8238c3b.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 0x8d80863264e6924931c8d9f2753d5cb3ac7e23de6e86ee7cb4573845fce7c4d6. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZFYZ2471259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29bf35fba6c3529eb74250829318337d895edfad0e496265e542a8e3fa226e1. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZFYY2482033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f489073b36be1a7d657f5bf471052b40bad18177011ed77cdd4e662516736a. 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/QZFYZ2471266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02451a295f31b826388d290537ef2070699266188d68e2c5869cf521260f2777. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZFYY2482021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2490278f6d568a6966f9920ea902a7e620435ae5420557105e4ecf21e86ec6. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZFYY2482026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a49328100a1db2831e862a1774d69318f758a7473ed3df10eecb61ac4e02a4. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:53:14Z), 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/QZZ7X2446509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05cc6e757ab2f41e83bd9809f91c9f3800f5be355440968255c68c20ac2d632. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZHN82586297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba73a77396edb69cb00ac4210a0a1516283df1e66bf2d8b817343cae600a77a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:01:24Z), 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/QZNWV2554665.