thumb|"The Ransom", John Everett Millais, c. 1860 Ransom refers to the practice of holding a prisoner or item to extort money or property to secure their release. It also refers to the sum of money p
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1532c1fe734f1c7ef9963f295c95f65e215d2cf2215b08a615ce194510fd31e8. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd8b6f1c-3686-496b-9a8d-ec302d58f80e.json and https://artists.proofprofile.net/proofs/artist/cd8b6f1c-3686-496b-9a8d-ec302d58f80e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32aa0c57094900439196ff47c949ab8fdb18cff15dc1c4bf717438fd9623a3ae. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6Q2036675.
A Christmas Held To Ransom (Special 2023 Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f546dcc03b9fa12bc4bbc33d9abd3521d7824028c3ccfc699fa2f66cc00c13. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZFZ62246979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43afc5792db9d20e61625d29d1e9dabfce9c1bfcc5ce705a5a15d6e008ae09f. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZFZ62246988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdf0db769b924dce35f7a17a6a9c79d1f3b5159e2dcd3347e5f0f79acb03dfa. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZK6K2302758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e47aba08dc17a404fecebbf2ae3510b3bff38dd233b022046185d4d93f76311. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZTBA2343547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545e6382ecae14883fff70a833fdc476fa6263c59e172677243af3af18a11ceb. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZWFP2322168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c770697f8867dfbb44ec7a8924b37dc1d50d4489dce29f72fecf634e1370ff3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GX5MV2401279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2874955a2618f6ab44f9c778e946e1557a0e43fd25a5d61cd1cb1344387deb09. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GX5MV2401451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5678782f9576afb188e4a69674e1be7560b136d69453f5f52272714610230c93. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZZ7L2459225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d722e05506cd21c32844d538fee7deb6235f171b3a0bb98a2b3550caa3c5feb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN52590781.