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 0x15469f818c214c8e37d787f9f9e985c4cf2768073ddd32eb7c9c65a1a427852e. 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/10758e04-018e-4226-b07b-648592c15437.json and https://artists.proofprofile.net/proofs/artist/10758e04-018e-4226-b07b-648592c15437.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 0x4c5a7560ba3565c4225477ef2e4f361a1964b87ea3d3f86a64df11792ad46abc. 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/GBLFP1607697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefeef534fb944ac5d716e30249824989492deb61564acbc8e60795e5a6281fe8. 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/FRPI62100240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f617c5b960a4e8659e18ac7aa5ac05acc68728732661bfe3c5def7fbd474130. 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/FRPI62100260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf1280b1e0ad43fdcfcb5afec74ce19b8add8ba21814550649f98697babd9a7. 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/FRPI62100250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af3e927de2adb7f3af3f01be691ef9b038b0b729d8fc1cc20b5f1f86b608eb3. 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/FRPI62100270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6145df5dd68bc9d0215ea8b25b6548b9ed0dc38ec54531e68bbd33164b21d3. 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/FRPI62100280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9335e7f16942f5ba04a1c12ee2a5d7ae393ec4c3be5010d06ef4c3fbf8293fa. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/FRPI62100290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133a21cc3295cad79caea4b492953b1bc8be5bb577e6d45dd3bbffed93ae3dbf. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FRPI62100300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c161a6bca44423ccce9876c46c4854c1af4b0553a035fbc238150d7c578ee74. 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/FRPI62100310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe041bc158b3d7dbe28ba635ffd49629c0309b4464e8f20cdcf0766c0fba80de. 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/FRPI62100320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31394d6285cd75dc8138d21af9627bbe9566159ccf3fc0ce8d578fbff974aed. 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/FRPI62100330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0be74b1ceb3fce16839477e3d6928de583e62efca2d851743d2741b0eff744. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/FRPI62100340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf756e5d1dc81eed068ccbb6d704cbebd4c2890987d9b1e20b6f6018bfe5c3c2b. 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/FRPI61600390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba49cd3597b77c2ab0d6598abeb785a9271df5382df26ec8b8765d655a6c421d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRPI61600360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf976a42b69ca295256f7775e6ccca5060783ecada8dad327ee1bec27ea9660bb. 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/FRPI61600430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eab5406b9cbfebb9fc4881bc3a0e0336ecd109aaa68da2132333718ce7c2073. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRPI61600420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a90286ee44db8d2199d06291748f1f1822a3afb35f1a6ff04281a63d99f69c1. 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/FRPI61600450.
Ajmal Logha (Un beau langage) [feat. Bachar Mar-Khalifé]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5543dbb5a1370ed9b6c6e03964d46bfc8d49fcef3c3023893c66e31a6ee0494. 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/FRPI61700610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01925c022924d05eefa6b0f2f884f40c59210173f46acb84d350019c5b1cb1b. 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/FRPI61700820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf756e5d1dc81eed068ccbb6d704cbebd4c2890987d9b1e20b6f6018bfe5c3c2b. 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/FRPI61600390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba49cd3597b77c2ab0d6598abeb785a9271df5382df26ec8b8765d655a6c421d. 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/FRPI61600360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf976a42b69ca295256f7775e6ccca5060783ecada8dad327ee1bec27ea9660bb. 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/FRPI61600430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eab5406b9cbfebb9fc4881bc3a0e0336ecd109aaa68da2132333718ce7c2073. 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/FRPI61600420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4478ac35104acc263b15c61c52a62faef4b2d8f8d491f21a9d82279e6f4668f. 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/FRPI62300010.
L'origine du mal (From 'L'origine du mal')
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470787c37cc73c06bc4e601562575a1244d0186e294fd671a5e43d8a89e18456. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FRPI61800630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfa24e2065da6d81c29578d3643aa0b3926651897a17031a5259ed01e48f965. 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/FRPI61800600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c16d1dd4927740f503096349c32ea94f117c22f45dd4586500d248d062b4057. 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/FRPI61500650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367e81107d9af351e0a56317d4f9d0451308eb4ae138c2bed5238ce97d73ee91. 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/FRPI61500660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01340d887178d38db1347da5eb85b92a35299fae1b3ea1c68567e908e8825e8. 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/FRPI61500670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bfc0868294a645fc8179987c45f8728ac6fbb496813c6ae434f32b3105fc37. 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/FR9W11812494.
Le chrome et le coton - English Version (Lafayette Remix 2015)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb648139392dfc5594217e3126cf3710995080b5b0a6d921598cfe2db43160e0a. 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/FRPI61500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623f73e5d11aa834fdbcaf11e2ab0cb3b012ca61475a4103b3408fdda39b114d. 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/FR2FD2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9294d62b9b2dd9581c16db227845172774391ab676a02337a79680bc322c1083. 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/FR2FD2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe902e02f0ee4844f38d53b9dfec1c51f8c5277eb29f5820e2e26502927cfc121. 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/FR2FD2200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8f987211f070f66a22883aa606945b1c903c463820b3400188bc533f9a7361. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR2FD2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e60834cc1f359249117089625a13432d401837509950735309ee883dad9622f. 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/FRUM71601422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1f750f98bc3f50bcd648a151b2338ad1b65326afb5572883dcf1960270df57. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRUM71601421.
L'origine du mal (Bande originale du film)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fafaa3a6c22e3813d9b9a9b4b839990e49324b0e7f48383ca248342704ec681. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:09:06Z), 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/FR9W12229644.