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 0x94bc74e97621c6a64b012803912d6c8a82a83611ab173954995ee98f16401d15. Chain 2 (Bitcoin): anchored in block 953888 (2026-06-16T04:55:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d88ada8-e008-4297-a590-dfdde559d136.json and https://artists.proofprofile.net/proofs/artist/0d88ada8-e008-4297-a590-dfdde559d136.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La danse à la cour des ducs de Bourgogne
Hélas mon coeur basse danse (Manuscrit de Bayeux)
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 0xea6da57345a5437516bef9f0abca3b2fd4b0a1611b8c6aae02a0c6e8549edd99. 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/FRZ178200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363902d042137c473ac05691e575fdb91b3c5f5234a8823a46297fc222212529. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRZ178200050.
Bransle d'Ecosse Amoroso ballo francese Bransle Charlotte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda4a84d1bbea9264763c154526e51cd6b9eb0583762ed741d4f80145bd5fe98. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRZ178200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf097aa4a7868a276d46d8c141e8dc1d9231e70b518aae8c006dd646f7bf6259e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRZ178000740.
Filles à marier (Manuscrit dit des basses danses de la bibliothèque de Bourgogne et Buxheimer Orgelbuch)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b534f9f42c65c0ecfc0156f230c402a4bcdabf8060f8b872ab62d4753a3de8. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRZ178200040.
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 0x835d4276faae026d41a5eebad0ef6bf7bd5b97fed0fb937d9b9fd85d95f35101. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FRZ178000700.
La verdelette (D'après le manuscrit dit des basses danses)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa533cd7e2d803444dd3767d3f94da96c620bb59ad62a5a4e12b7819e74558f99. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FRZ178200090.
Noël en tous temps, en tous lieux : Noëls européens du 12ème au 20ème siècle
Eloge du vin et de la vigne de Rabelais à Henri IV
Chansons et danses au temps des cathédrales : La fête sur le parvis de Notre-Dame
Chansons vertes, gaillardes et coquines au temps de François 1er et Henri IV