Ambassadeurs (also known as Aristide Bruant and ) is an 1892 lithograph poster by French post-impressionist Henri de Toulouse-Lautrec. The subject of the poster is Toulouse-Lautrec's friend, cabaret s
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 0x91abd136be00a692a496b1aacbde924d49e97619a189d3359b205a2ceb44399a. 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/6845326a-604f-4e5d-9ce6-af8355c94b96.json and https://artists.proofprofile.net/proofs/artist/6845326a-604f-4e5d-9ce6-af8355c94b96.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 0x9bf797f2f6811472815d92c90d4ad049aea658c4500203f2ad9f51cfd780fa47. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBFBC1100756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6239b7484584c91a7b13401a383cd07d57ed261a29ae774886ac5bf456226a29. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBFBC1501258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c02d36fb3167bcec520c2e5cd32aeb51a19ab65bb7ee2a2113259189a6f2a1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GBFBC1501273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96858b32162f42a0b64035851235b3ec78bfa6221242139696c07ac4c748b90. 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/GBFBC1501277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafac522790e5a15a7ab365bfe043c3a7c93dc1ad8cc167aea57d620f2c29ddb. 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/GBFBC1501296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c02c3686bf4454286daacf1db42780f5f1e38c47a1fc610393cd6333e28abf9. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/GBFBC1501359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff72a6bda4fdab22d0fab8c799258c4fa7fc39128509e8de3e267f64c0f66b74. 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/GBFBC1601454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55c5ae7a7c5900820e64dd1e822301cc1e7f778ceee9432df22e0ee836a6acd. 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/GB45A2001945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c624c9b891911b88a69e889b2fd0f425608c6c246d276732cd206e5699ed90. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GB45A2001947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e5b5f4e2adbb7aeef06e47691d93acf2a986bcf45e486c6eaf760bb6fa53b4. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GB45A2001949.
The Future Is Yours (Ambassadeurs Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8762389268f9995f5d15aeb899f3ebbfe42690a4ac4559e435bf8f0924911461. 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/GBFBC1300968.
You’ll Never See Me Cry (Ambassadeurs Remix)
Future Disco Presents: Poolside Sounds, Vol. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0417ef889ccef12353543682ac76e38935a6b815d3e7549994c4300368c2bd. 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/GBFBC1501343.
Trip-Hop Music - The Must Have Selection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf797f2f6811472815d92c90d4ad049aea658c4500203f2ad9f51cfd780fa47. 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/GBFBC1100756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3482277693b140e3cf4989e08562f2a50120682ee3c980d0f2a463dd78569d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCFB1404221.