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 0x626f6a6e3ab62dbb85ba573f0406bb600f64dc8ba0dd4e79773e89ddbc987f9e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21b7359d-d3bb-422a-a01e-8c39ea52f1b6.json and https://artists.proofprofile.net/proofs/artist/21b7359d-d3bb-422a-a01e-8c39ea52f1b6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tchaikovsky: The Nutcracker, Op. 71, Act 2: No. 14c, Pas de deux. Variation II "Dance of the Sugar Plum Fairy"
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 0xb788b32235e6f610557835e96c8061c25afb3fb6fb40f71529bcfef4db5fc4a6. 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/GBAYC1000878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed664db62dfdbc3a2c70f788a6bd1d5ce8bd32b60ae8a510fd96407784e2ee0. 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/NLA801400003.
The Young Person's Guide to the Orchestra & the Big Band
Nog 13 Nachtjes Wakker Liggen Dan Is Het Sinterklaas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e6009bda57458befdf4b187396728a5cc36558d698c6614e5c6602c83bab84. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLM381200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd324da3637b61fdf73f0871cb4a36dd03af9fbcbfd981b3eb3c0571fceb6ab42. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLM381200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab139e9d270b117ab6d2b21728bc6b4e5030c3d2cbc144f967a72989f41ab88a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLM381300006.