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 0xcc30073cf82a1ce67baa70d94e1573082db10e94205757d33bcba3970f1b9d0f. 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/d0ae8971-abb7-4346-8a4b-befd9ebacb2f.json and https://artists.proofprofile.net/proofs/artist/d0ae8971-abb7-4346-8a4b-befd9ebacb2f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Whistle (My Nu Leng 'A Little Darker' Remix)
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 0x1397b6bc8bd7b7f7954989dd966a8d7c83cb890068970f79943085cbaabceb0a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN82447311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73266919ebfd74ca42038d709a2b87bc7316561a8de45f701238de62ee46e4a6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBEFR2309239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae65fdf50e3b4bcc73f3310b8b1317814a5de03f3a2cf1d5d7f94dd9e3f215b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMFME2389156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc010d201508e794135a20d9fbefefda373b75c2a08826f673016dd5ecdc870c1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA092307772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc6b5e36d7fd1f761f18786a249c3815ca737c3f937ba762162b621b4f72203. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB6WQ2300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2ed388eee6bfc802d9c85c866683161bfa03b9a4b30cc43f1d3bbff1774111. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB6WQ2300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c7c734b645b0bdcf0a82f36887b9fe63f7de688e30a9d54ea5b7d099d9a1a8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB6WQ2300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a31149504c5cd22449705f72c9d5822720ea00869ffa8a8491049677e4af159. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTAZ2228501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2f9cf503bf28cbeff39a60514d5defbd0e27450be534dd55dccbb2fcf14317. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZS7J2485056.