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 0x6a9ced374c87cff3f731a0b3bceef5ba95bcb5b419f016397fababb0ac78f3e0. Chain 2 (Bitcoin): anchored in block 954002 (2026-06-16T20:47:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3230d295-6319-4a11-b8b2-b63da31d5142.json and https://artists.proofprofile.net/proofs/artist/3230d295-6319-4a11-b8b2-b63da31d5142.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Messiah, HVW 56, Part 1, Scene 2: But who may abide the day of his coming
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 0x3c59a5b5d29f591772ccd388bbc8302f4f5423f9a3206391dd4925f0504f19fd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1700606 — a six-check JSON result.
Messiah, HVW 56, Part 2, Scene 5: Thou art gone up on high
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc4a27063d946c31fce50895f457540136fb1ff548a8c9f8afbc1d90ee67b59. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1700710 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d647bb993ef2e2e3cf3c76703f20156014753dc8f37faaaefe7be8f8165fd7d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1700613 — a six-check JSON result.
Arcangelo Corelli: Concerti Grossi (including "Christmas Concerto") & Vivaldi: Lute and Mandolin Concerto
Concerto da Camera in B-Flat Major, Op. 6 No. 11: I. Preludio – Andante – Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1163846ba0f52bf7372744cdff2bb0189cf76d9ad6a02dc851fd7dcc3776a2. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205101 — a six-check JSON result.
Concerto da Camera in B-Flat Major, Op. 6 No. 11: II. Allemande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0342b6a85ee88fb92f8c58fd21f1cf9b88d8cf107ea6a45d4a22739eaf487d7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205102 — a six-check JSON result.
Concerto da Camera in B-Flat Major, Op. 6 No. 11: III. Adagio – Andante – Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353281dad30f265f367be5ca837eb72267af49b4b78fb9d3513f220d543206a1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205103 — a six-check JSON result.
Concerto da Camera in B-Flat Major, Op. 6 No. 11: IV. Sarabanda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829c0b792d40b70ab3f2743e5ad3b29337ca672311813e1d8bcaaceef6db728d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205104 — a six-check JSON result.
Concerto da Camera in B-Flat Major, Op. 6 No. 11: V. Giga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011b6384b62c6313bac1ae5ba4fd10dcc9815d4549731c51e7b226769505e301. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205105 — a six-check JSON result.
Sonata a 4 in G Minor, WoO 2: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd07f5fdfbbcc959b90b7827d6f243b45bc5f60c5622336d913529bed89dd06c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205107 — a six-check JSON result.
Sonata a 4 in G Minor, WoO 2: III. Grave – Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaff67ee61f4ce1ec10b9a2b7c6913541b278e2d34c020be18de8dcde54efbf9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205108 — a six-check JSON result.
Sonata a 4 in G Minor, WoO 2: IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff106564945a2e4bdbbe8d21c476c52ec29e7f1dd34420e7ea6d8bd303a8fea. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205109 — a six-check JSON result.
Concerto da Camera in F Major, Op. 6 No. 12: I. Preludio – Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20952d0388224a722b3ff40a785e503c55ab5fe87081b56cbb6fc22dd9cd4710. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205110 — a six-check JSON result.
Concerto da Camera in F Major, Op. 6 No. 12: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c58875f9309ea8324bf0fe9afda742bc17194f1fabd7f9993574749fd85011. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205111 — a six-check JSON result.
Concerto da Camera in F Major, Op. 6 No. 12: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d546da8c49371a9a9115db272e73284c45569d5ee1910c9ccaad6f7ad434e8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205112 — a six-check JSON result.
Concerto da Camera in F Major, Op. 6 No. 12: IV. Sarabanda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e74255b83c98e0fefd270fdd123f38a944aea7d2d2d10ff6b28cdf05fffec40. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205113 — a six-check JSON result.
Concerto da Camera in F Major, Op. 6 No. 12: V. Giga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e059592d77fde6b28fb4dda5a65a59af40f52f7bee745223c0a1bb42b59eac. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205114 — a six-check JSON result.
Concerto da Chiesa in D Major, Op. 6 No. 4: I. Adagio – Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f262137817d25e717ca916ca2b8516ac85ead9ab82d902c4d375b51db1467d7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205115 — a six-check JSON result.
Concerto da Chiesa in D Major, Op. 6 No. 4: II. Adagio – Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed36d5db53a37b9405d5ee9822d4ced23788b70e446fe15e5ea4ad25dd8bc10. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205116 — a six-check JSON result.
Concerto da Chiesa in D Major, Op. 6 No. 4: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415a9f36f122b6e2f7c0cdbf690622bb0d4957d4382430d2b5d4386b6a9795f4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205117 — a six-check JSON result.
Concerto da Chiesa in G Minor, Op. 6 No. 8 "Fatto per la Notte di Natale / Christmas Concerto": I. Vivace – Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35ec18fb8f66bf63a4d720d2dff92f20923753b2fa4a52244a02234c91a94f9. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205118 — a six-check JSON result.
Concerto da Chiesa in G Minor, Op. 6 No. 8 "Fatto per la Notte di Natale / Christmas Concerto": II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499f9e6bccda394574ff66239016888967ff7255b2fb0ca031dbb2785067a119. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205119 — a six-check JSON result.
Concerto da Chiesa in G Minor, Op. 6 No. 8 "Fatto per la Notte di Natale / Christmas Concerto": III. Adagio – Allegro – Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe76085a73130b6ffdbb31b635b2e06759e5852d1c3756a67e97dd6614cd212. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205120 — a six-check JSON result.
Concerto da Chiesa in G Minor, Op. 6 No. 8 "Fatto per la Notte di Natale / Christmas Concerto": IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a9199cef53c06ba86461f40130169d3d19e8f16de6e849bb8a865d04cd452f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205121 — a six-check JSON result.
Concerto da Chiesa in G Minor, Op. 6 No. 8 "Fatto per la Notte di Natale / Christmas Concerto": V. Allegro – VI. Pastorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf970d5ac4a1b47b7597614871ffa234d029f5b40412eb2139ef1971d13a7d5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205122 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802236f5622c12ae7dd05c30693685f10599933ca1e1445de9637a2cb31b7a76. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205123 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f06bfd2e402f7086e8c8c7f5b4783c84aa69f29a5a6a1d55f1167a2bd64301e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205124 — a six-check JSON result.
Lute Concerto in D Major, RV 93: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb511ff01a11c40db51608651d0eb836c5e14dbc7e648142548519c7912574fc1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX762205125 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ce064be0166ddd6f0d2a8efe5036ac326512c65c7ca2b34bb8f4a308ad731f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVOZ0700101 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c57ce294da219e2ae6190b3d76349c6a5acb110147e57875ba5b536f205718. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVOZ0700104 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff9c6ab5379d1f2bf0053d4b345ce1e525a5ff11d558dd82a8105f96177017c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190967902 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721de5f3c04090ccb37f6d09c87b7677c8aff73e55487843ac71e72e71480c6b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190967904 — a six-check JSON result.
Armoniosi concerti sopra la chitarra spagnuola: Chiaccona in parte variate alla vera spagnuola
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d7e730b5cf36106cd0301aee138adb0366940d262c98e1e6701085a90e9369. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH1957403 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7c26907bed6df3f5c61f87af6669865f0fdbe5abce998a169fcb6126ef23af. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH1957404 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f97c4cf98a0c5fd27e59b9e4a5a7635d44e20455b60ace434a11ee6c7854e14. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH1957406 — a six-check JSON result.