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 0x0d7f9c52040bae3e6dd890798dfd898b5a6df87361957abb41a37b9e5c1ec69b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae357f71-ad49-496f-a067-aa5c8de40fd8.json and https://artists.proofprofile.net/proofs/artist/ae357f71-ad49-496f-a067-aa5c8de40fd8.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 0xacc3b3631432352b5edd2506e58266a5eefae81da09e8e4ca4c6867ddda5b0a6. 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/TCADH1764785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f466846386c28ae69ddafff7ca95d748e524d304f915101ab0a532954e6a77a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FRY681800001.
En tirant (Extrait de la compile Cercle Fermé)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdca85a7a93ed3cd4f42947f6a4b8263cd801bdc3569a863f83b7710db2a593. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FR9W11904064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8036618ccf8c3b7e6587dc34d2525e5871e73ed0401dafd490a52a18bf63dc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR9W11913615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdca85a7a93ed3cd4f42947f6a4b8263cd801bdc3569a863f83b7710db2a593. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR9W11904064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7c1ecb18e2c2d3d6c4c265576f248232ec65479f42c2bc5ac06de12a694d5a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRY682000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d926e2ed318935a8748156924e6cdc32d0960df78639be6b654182b9da7aff2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/FR9W12018950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9673e3402263257e347b8044d119c60193dfcdc5765db3335ea257c721404cbd. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/FR9W12018951.
Je suis mauvais (Extrait du projet Art de rue)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c621ee96a2dbda76d398cce43e6a1e2d7383b080f62cc235cf4419ecd6f843. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/FRDFA2000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920fd9db48a9ea7624aed13f38fd65e2a3ad44b337220f3bf762656f0eeef182. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FR9W12120534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1595881db9da3dc726a6d433fb10703f589608920fbf4e37cdd983297ca734. 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/FR9W12144091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de85c9a767c92c9915d5cc9be7682439bc33fede0e114a2664a1a2b99a3daf5. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR9W12213619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7829b4d864d4b0b44ec36b73f4251b062d5e02d169507a3a427e445f85bf899. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR9W12213621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631e0c26b04294133364d748a8cfe0429be22ce2bcf6b03e5a0b083c862d387c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FR9W12213623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7829b4d864d4b0b44ec36b73f4251b062d5e02d169507a3a427e445f85bf899. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12213621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd731cce822db0254bdcb9104d4173047798ecd953ed5dc9cb791270a9438d5b0. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FR9W12226214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f73fa5da52de2bf222f339ea91fdb80278ee14e286a3bf4066ca2190569d977. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12249796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ded176dc397a48d306889ae1b67855fc2c235382788021af73978368dbb0cd. 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/FR9W12307043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595b18206cc83ec6da48ae801bf6825aaec83688d6398ac05ecf152ac25725cb. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/FRIDO2310245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac101d703955bf39031b157717f6ecfc93c324a81b5f63bf84f3f4df2698aa1. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAHF2309732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc720daf905e9e23a84319f722d1a4cf38d6cc5bf6c714613648e481836fd31c5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMEP2409805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9178cc55ffdfa61a0df230c6a7c69eaa472fafe93542d0c3b8f7db62ba98d4. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZTBB2401613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd212fbb24eb9f37ea8f42e0aaf0e287c387400481bb52352b8bdb0810fc28ded. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZTBE2463857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9e1e7580f4635b654c03f23a4ec389e16cc1d20e89f249fccc48df3f9a9408. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT3EY2419928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44959b437bd233fa4d2f32ed22f32eb5997f76206327ca82e092a9c7289388d7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6P42216069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32f228f6a0973193ab9763787a31ec8b50ada6b5859919af9fc850810b81626. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITPDE1900006.
Rendez-nous l'argent (feat. Dabs & Bolémvn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b0580ed239c9d7b1189bad4af8233ddb59462721002004a1c62bb922271125. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRZ081900230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c621ee96a2dbda76d398cce43e6a1e2d7383b080f62cc235cf4419ecd6f843. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/FRDFA2000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfebcd7e64acbf99244bdaad9e07f99cf679dafc7e3adf90473ea394667004b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX762125243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbd52949f5822fef483fc9c89b9b0b3a26ec6d702f274037f0f35c648c9cfbd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR9W11804250.