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 0x13001fff0b8e31e039997488507ba0d8eab25b174089014f038c2d8018bb5188. Chain 2 (Bitcoin): anchored in block 953976 (2026-06-16T16:55:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bc7bdc0-4274-44eb-b04a-8ca827e30e1d.json and https://artists.proofprofile.net/proofs/artist/2bc7bdc0-4274-44eb-b04a-8ca827e30e1d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Samson HWV 57, Act II, Scene 4: IV. Duet. "Go, Baffled Coward, Go" - "Presume No on Thy God"
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 0xc703cc6970f4d61788fbf71d0127dae7609a73fe5af2240d986a5bdf7550c88a. 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/BER181941135.
Samson HWV 57, Act I, Scene 3: I. Air. "Thy Glorious Deeds Inspir'd My Tongue"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4ff0ef2ce8675723c80a7f52b09cbda64dd2c43ea0795e00912c42fd0d3fe1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BER181941113.
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
Samson HWV 57, Act I, Scene 3: II. Accompagnato. "To Sorrow Now I Tune"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bd0384a42bb2b6032ce826c8f688bd69f58050850f49f975fe24aee2b8ce5c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BER181941114.
Samson HWV 57, Act II, Scene 1: I. Recitative and Air. "Trust yet in God! - Return, O God of Hosts! Behold"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3dff6a38d376323117ce05fc6d5c84bd332f28ffbbb5663b5973ae9e3d9967. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BER181941118.
Samson HWV 57, Act II, Scene 4: II. Air. "Honour and Arms Scorn Such a Foe"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d64857ec4907ef708438287db2713bd3cb6c9fd943d9e4ed8dbc6544f43ce6. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/BER181941133.