thumb|Penelope. Drawing after Attic pottery figure. thumb|Penelope encounters the returned Odysseus posing as a beggar. From a mural in the Macellum of Pompeii Penelope ( ; Ancient Greek: Πηνελόπεια,
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 0xf576322def7a2c1dc1f8674c6348caab4d4753c6dee750b94991b0732416ba4d. 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/ddc838e1-1f97-4815-a038-db05639aa014.json and https://artists.proofprofile.net/proofs/artist/ddc838e1-1f97-4815-a038-db05639aa014.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 0xb551e5415b1fa7b169506a305fee17931964791dc26e1e3a9326264982a1cf37. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:58:14Z), 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/BRTCD1500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9157ff8be23d86a381ae822a5f29d6a75058d14fb41ffe55a7f0e76b5e66dc79. 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/BRTCD1500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9e5d0501e02c80dbf7a45cb6dd6eec4f08a85ef94d697b5881e2f086fd52ce. 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/BRTCD1500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366bfe6c260f7d983805099a4a923225fdc93e759d76632d71e0e380ac414d90. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:49:14Z), 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/BRTCD1600012.