Principles of Geometry is a French electronic music duo from Lille, northern France, which consists of Guillaume Grosso and Jeremy Duval. The duo draws inspiration from the jingles on the VHS tapes of
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 0x27f476abef33983ada3540aa27db4e667af5dce2ec2d88b1982d309686016271. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5cb56d0d-7bc9-49b1-a45d-e9a70de6ecc7.json and https://artists.proofprofile.net/proofs/artist/5cb56d0d-7bc9-49b1-a45d-e9a70de6ecc7.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 0x7f17aceb49324424123c5b4adbf65b91693f3b3f5e0fbfe493e49b8e3126515d. 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/FR5S90700350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b84e314891f02e6624d7286bddea616b91bf981a84bcb83df46910449228f76. 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/FR5S91100896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc943030ed462eb4345e46ad7105daf04bf95b1bb55ea537788acf71ddc9fb75b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR5S91401026.
La pantoufle est dans le puits (D'après l'oeuvre originale de Forever Pavot)
First, I Heard Colors - Pye Corner Audio Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8262e597c114620dfca314331a9bc74bd63f06a37ad8b8eb02205a210b505515. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR5S92200470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd502489e3bd484112035c88c27b8dc29fbbcf46906fadafb03485ff92aea8c. 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/FR5S92200230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eefb6b838417b7bfbc7806ac8e46b5fbaaff390b226b1a04b5be6b660291e6f. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FR5S92300380.
Principles of Geometry's Poni hoax's Paper Bride - Principles of Geometry Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6aa83433c358f95c3727c1af4ce5d2c84a7f2c63f03b33d023228b0490fb6e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR5S90800756.