thumb|upright=1.35|Political cartoon parodying James G. Blaine with his wealthy donors feasting at a table at Delmonico's while a poor family begs beneath. Illustrated by Walt McDougall and Valerian G
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 0x177092a7d0c575971406d260d23d3ab0a3e0af71bbe2c19a12a03c795ee27528. 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/53897cca-7967-4cfe-bcc3-733512f5c9b0.json and https://artists.proofprofile.net/proofs/artist/53897cca-7967-4cfe-bcc3-733512f5c9b0.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 0x7829151d57b76be1f2917ff53c5c089a7b5c7b35acc6c4dc72957b7972e99b4e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWV32447147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8122b55339aae4b81035a6664c1665e57db4acabd677e1725678b4ea6f44808a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWV32447169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa6c2fe04df5cee7e46237b27c818ebb648291019fa135c5d9ccfcb05cfd34a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWV32495788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbebe3efb4469c910c9ade4fc5d302d41d859f9ebc3644aa683e1a38f4df24c. 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/QZZ8A2407937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7807c7665a2c7588cba9322fd0818d1ebefe34f32b3e98bdf8f7843420259b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:27Z), 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/GXHG92550826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e8a5ab9eea1e89015c31a7d396471c3dafce26fcd6a9648e88a2d2c44e5c57. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:09:31Z), 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/GXHND2556877.