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 0x8c22c29d21215e8e311c60935d10b5b327ccf79b5004832c6f3f919b5d509d22. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4601176b-2187-4ab1-acbb-939b792fced5.json and https://artists.proofprofile.net/proofs/artist/4601176b-2187-4ab1-acbb-939b792fced5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tessarini: Contrasto Armonico, Op. 10 / Introducioni A 4, Op. 11, Book I
Valentini: 7 Bizzarrie Per Camera, Op. 2 (Complete)
Kusser: 2 Serenatas for the Dublin Court
Cirri: Cello Concertos, Op. 14, Nos. 1-6
Cello Concerto No. 5 in F Major, Op. 14, No. 5: II. Andante cantabile
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 0x2c9b4e63e1758cff085a81aa5972304be55a32ee801af2ac73bd93da7a33d785. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HUA253212605.
Cello Concerto No. 1 in A Major, Op. 14, No. 1: I. Allegro maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588a7b85fc6b070bf176d07ad494939ecb8898fb18876cc2a9d872ecf91e13e1. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/HUA253212501.
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
Cello Concerto No. 2 in G Major, Op. 14, No. 2: II. Largo assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4927f91be2663a78429397256ecec27566907a5a4a8e5a494c1fe549e5f29f3f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HUA253212505.
Caldara: Missa Dolorosa / Stabat Mater / Sinfonias in G and E Minor
Sinfonia No. 6 in G minor (arrangement of oratorio sinfonia San Elena al Calvario): Sant' Elena al Calvario: Introduzione, "Sinfonia No. 6 in G Minor"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6440016c3d3aab1787bff32e8b7e03df08ee7ad0ee8829b2d6415da005501537. 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/HKI199935501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09ae8b9cb878ff1c6100cee0621a5035d8033c080cba2171dce1c2705b68dfe. 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/HKI199935502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c5c97d82f7d4422a7bff2434a22dab3aef3fd6eba5de20eae54af8d65362a8. 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/HKI199935503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5164364b41576608f4c6df3685e98e671f0e9aebb95478d6b36b402553becf92. 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/HKI199935504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8926accc253dc2a9072730ef15e324d1a2e1b0d10c367d06c19c3a674d2dd97b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI199935505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e2e481eb695fdc7b6fa98ebdaa916279ea6544e46d51e1c6a167f56645abb5. 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/HKI199935506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcc7dd01ab7d60c247b9e41407132b6c2b662dc57954ea4208eeb7a71b100e0. 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/HKI199935507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ba0d12a47f14bbe07c2263e197b54862a2da66f9f3e6c9a3197cfed27c3e4d. 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/HKI199935508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad1939c1a5d8c29c71db78dd4f209991c2e361038c45f0b352ed42f29d6007e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI199935509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f3257f6a14a508e34a4ecfd1ba0715957501c35d730889ccf7f6224fc764bc. 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/HKI199935510.
Stabat Mater: XI. Christe, cum sit hinc exire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89baea97a6facd0769268e31a1123779299f87e6f293adb6ceff4f29d600424. 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/HKI199935512.
Stabat Mater: XII. Fac ut animae donatur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969f77b39f99079d21703b9d67c32797ee86b0a856e01a272ef60f2ce9e94e35. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI199935513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69b580a6c8f8e74c7187f3f1e70268048093c2430a51d960496e789f82fe4cf. 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/HKI199935515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31efaa0d04ef90334415246d184c3512db6e2daef279eef312be71dad78e5c6d. 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/HKI199935517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d3fb3fc86ccc7189cdeb96f90478537ebd1715be546146fcae2892da45b8d1. 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/HKI199935518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6a81956c10d5b01db1bc4d01b458d7b4bff2bdd69633589f4871d4113a7565. 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/HKI199935519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe325a41c8b5d8e0b4c70b0f973d36e8b4045a03d2ec75b3e4e4f5a896c68eab6. 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/HKI199935520.
Stabat Mater: X. Flammis ne urar succensus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3bb9b22a95f60ca3469a846a9a8ff0d4a3c9bae29aa51f0160732dcd8ad720. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/HKI199935511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc20b585743d5ba609698e0356f8905b64db4b0d74246f5422e0f0dff887f70f. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/HKI199935516.
Flute Concerto in C Major, QV 5:15: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8660735d0ebb3688a1caa8cc15f8c365304055c72ed014bcef11e3cd34b73d6d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HUA253191607.
Flute Concerto in G Minor, QV 5:196: I. Allegro di molto, ma con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6a599eaddb114394e7ac685c62525d06e2076a5798438c8518ffa8a7a8895d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/HUA253191601.
Flute Concerto in G Minor, QV 5:196: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e79cab9e596fa99e3a6fb954a81d93c80ceb36e25d167f1bca2364cf39b08f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/HUA253191602.
Flute Concerto in G Minor, QV 5:196: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c76103127230fced6962e9a122e741b5e7382d1e118a9ea25ba54b30f4bdb2b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HUA253191603.
Flute Concerto in D Major, QV 5:74: I. Allegro ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5b8b6dbfd30465a9459db8de2ca9238f82e0db28727aaa69d445f6fd1f76d6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HUA253191604.
Flute Concerto in D Major, QV 5:74: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225e6b2f59c9a15c332984ce53ddebae46cc3d845aea17f975b2cb3dc271214d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/HUA253191605.
Flute Concerto in G Major, QV 5:174: I. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb984f7a1d3bad64e2a92616cecf1afb3e53be444c7f07d39192ccf1384edca4. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/HUA253191610.
Flute Concerto in G Major, QV 5:174: II. Arioso e mesto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae3a6e06f0e8517d57adc41b500d23d5e59feae4554522013019c4b56df29e6. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/HUA253191611.
Flute Concerto in G Major, QV 5:174: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088360c7be1f1bd6071a7ab0f7b3eaa18b2bc05ed2badb4e38bec7de89fcd728. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HUA253191612.