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 0x3119323f405bb1d84c53c5842a72c764fd287d3889b8e1c713e186c1dbc226e7. 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/92b5ec2a-5c04-4326-be08-f9afe0fe5335.json and https://artists.proofprofile.net/proofs/artist/92b5ec2a-5c04-4326-be08-f9afe0fe5335.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Les Pêcheurs de perles: A cette voix quel trouble... Je crois entendre encore (Nadir)
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 0xa4709358ec7cce1aba74c4ef01e13f9fc29b91ffb6b57985ccd2991c517b6b2e. 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/GBAYC0900439.
Verdi: La forza del destino, Act 2 Scene 10: Finale, "La Vergine degli Angeli" (Leonora, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50449fdba58ca6ce0f25eeaaacef1a98d740436364d05f050f5ce2f5fffbf2a5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAYC9501335.
Bach, JS: Wachet auf, ruft uns die Stimme, BWV 140: No. 1, Chor. "Wachet auf, ruft uns die Stimme"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ba8ff507a91e7a62035c6dcb1d2edb6f2a7bc9392a7d46902f7cc0ea75d71c. 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/DEA349801363.
Bach, JS: Toccata and Fugue in D Minor, BWV 565: Toccata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1310e3ec033f4d19bcc339518b65490b9023e1f01a7c99a274491eeb1d5f863. 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/GBAYC8800390.
Mozart: Horn Concerto No. 4 in E-Flat Major, K. 495: III. Rondo. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc276605b08cfa9b1603241d81aac4e253cd140c2f0b94fd83b15ee03c7a63b22. 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/GBAYC8802143.
Schubert: Deutsche Messe, D. 872: No. 5, Zum Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71198d65b12ef74d5a9976b1a43d5e8d4d6bd15deedf443d7458056ae8cf6a63. 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/DEA348801333.
Franck / Arr. Sandré: Mass, Op. 12, FWV 61: Panis Angelicus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8260edb1c861e33cf90a50bc755f7c394eb9f03d233e6f74edcb2ac15b24a63. 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/GBAYD8800084.
Berlioz: L'enfance du Christ, Op. 25, H. 130, Part 2: The Shepherds' Farewell
Orchestre De La Société Des Concerts Du Conservatoire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323e90ae0ae63fe062c16bd51929789b3a189580a4911d1cccde37ac2a429aa2. 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/GBAYC9400284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4de4494e343ae9897745ac47e9ef493dc90bb001eaeff6f43146ce6ee6066e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEA348802248.
Grieg: Piano Concerto in A Minor, Op. 16: I. Allegro molto moderato (Excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a7b55914082365d3b8164a52a39dc5736db691647c2272ac344e33f71cc432. 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/GBAYD8400197.
Borodin: Prince Igor, Act II: Polovtsian Dances (Excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db9ea18ad041fec5222fff743aaccbcf9696003503abdd1beb0046fa91681ea. 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/GBAYC8701433.
Sibelius: Karelia Suite, Op. 11: III. Alla marcia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7aa5396cc8c4d28f339689a904142b6f11912b47647a2cc826330e7c8032ba. 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/GBAYC0000005.
Khachaturian: Spartacus Suite No. 2: I. Adagio of Spartacus and Phrygia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984524c5a81d0cd838bd028d9db640e89dbe373f456da23b9f2c79c571c77698. 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/GBAYC8500390.
Tchaikovsky: Romeo and Juliet, Fantasy Overture (Excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecced2d0c629f3036a5f621f1e812af94931f8c56f23b656422a624c7b81ea7c. 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/GBAYC8700940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb372cb9afa2112cb32dbfe7413aa5ddaaf0e0ab98082582378c65de9415a0b23. 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/GBAAA9710450.
Beethoven: Symphony No. 7 in A Major, Op. 92: II. Allegretto (Excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3855b047326b17b2e218e2cf61a41fbbfcb04306740da741f5acdb1bad9d449. 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/GBAYD8100214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e031569a5d3dcfa23e1941f0878a74f084b9a45291fa0eedd599928c4dfd8aa. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBAYC8700839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f5b7ec5c024f68829e272c970332ac6691fcd842d77d58bddaf4bb89939e94. 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/GBAYC0000001.
Bach, JS: Concerto for Two Violins in D Minor, BWV 1043: II. Largo ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddffef51ba13d02f3135cf230b94331a80ea8d8240e0bbb932dca2824bc6358a. 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/GBAYC9402536.
Tchaikovsky: The Nutcracker, Op. 71, Act II: No. 12e, Divertissement. Dance of the Reed-Flutes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40eed33275fec1aef57b8b1e7a0f9ef8e65e6b2fb75379d74e6b0f1b0b1ddda5. 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/GBAYC8701458.
Haydn: The Creation, Hob. XXI:2, Pt. 1: Trio and Chorus. "The Heavens Are Telling" (Chorus, Gabriel, Uriel, Raphael)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c838e600550b063fb704a0ba6c375544982b6faf121f8670321c5eafac2737. 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/GBAYD8800083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a6def8a1d6956abd5a6fac897c663e6e718316a2669a6e3f784a2a793eb31a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBAYC9803752.
Handel: Messiah, HWV 56, Pt. 2, Scene 7: Chorus. "Hallelujah"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8832602c32f968b83eca5f0a4493b675ab8d7b56b3fa174c47e6f9f3872616. 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/GBAYC9703282.
Saint-Saëns: Symphony No. 3 in C Minor, Op. 78 "Organ Symphony": II. (b) Maestoso - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0795b8932fb4dc0aea87eea155de6e1cd2a972cf448881b04ea80250e3ca1fe. 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/FRZ119700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb372cb9afa2112cb32dbfe7413aa5ddaaf0e0ab98082582378c65de9415a0b23. 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/GBAAA9710450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac91a8cfb93ead6320bfa10512281a85870892b768f583f02fbd332c9414b31. 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/GBAAA9901578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a1896a84dd6113c5b2f5c3829270f101be62446404d734cd63c2411622a457. 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/GBAAA9901585.
Thou Knowest Lord The Secret Of Our Hearts
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc81364ed2ab1dec8f2841dca568be36510371b8589b4560ac4be00e1367a6f1. 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/GBAAA9901587.
Non Perch' i' speri, donna (ballata) - 2000 Remastered Version
Michel Piguet/Ricercare-Ensemblefür Alte Music Zürich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42315668dfae6944703c370a7e145e78efe0d22a2db55716d2cb1f4e0ee57a1. 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/DEA340001146.