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 0x36811eb462413a90ac1df01ba8e1fdc70013715eaeda6fb3282266c214b0e734. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab4f184f-9c96-4840-82c7-9484fb872a92.json and https://artists.proofprofile.net/proofs/artist/ab4f184f-9c96-4840-82c7-9484fb872a92.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 0xb3fdc6ba5415e93932d99666ab834361b70326f66144630401126c41509068fa. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6F2590170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718e73d7cd821b18ab19bf7bf3d5d874e163368c364eccdcee711fab0fe340e9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6F2591279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b32eada7ba6c4400dfd3d70062823d4d7ae7eda13f340fff6bbe71a8857ad4d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZPLR2569215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57c29fd1e3db966366965237863a97ae8e741d0c4243367919fbe771eac1795. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:00:53Z), 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/QZZ7S2588245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98c09e765c26f610bcb5d06f6b3597c06ac2c471ff21f5a18da0007bd35b9e8. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZTAX2520233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af551617bb5a6cd45d21a6eb3c5408a12ce45f38b8ebd7e5ba3ae43779ff4d4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:50:09Z), 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/QT3FF2537840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd80c476db7db5ad24754045f829f3f33a14131f5b41474437ad8d03b4a9d3f0. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QT6E92591213.