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 0x4b68ff1401474c8c686869de35dd36f2e55fac62a9ba6db419b9c2ecf5292392. 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/548883f7-2da9-4a66-9e06-943fa8288d03.json and https://artists.proofprofile.net/proofs/artist/548883f7-2da9-4a66-9e06-943fa8288d03.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Guided Tour of the Baroque Era, Vol. 5
Charpentier, M.-A.: Messe de Minuit pour Noel / Te Deum
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 0x762e50825b73e457b62814aa78096b0aa197ad41ecdd1fd88c5e018a00679b32. 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/HKI190305001.
Messe de minuit pour Noel, H. 9: (Kyrie) Noel: Joseph est bien marie - Kyrie eleison - Noel: Et sy je la revoy - Christe eleison - Une jeune pucelle - Kyrie eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5fc9d7b3d218e7a525c6ee4e8fa553e6476e831984d02574035edc3d2e24f8. 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/HKI190305003.
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
Messe de minuit pour Noel, H. 9: Noel: Laissez paitre vos betes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd94b32b4b3b317e47496107a60c59f108ac1c912761f6bd72a4e5c93746258b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HKI190305006.
Messe de minuit pour Noel, H. 9: Sanctus and Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14459f0b84b1bd26fd4c416eb8ae79b3e8a7517fb8655a9e48f8cf498f66dff. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/HKI190305007.
Messe de minuit pour Noel, H. 9: Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0763c00d2d5e34cc945e64c25273dbe2f03e0f5ab4185d0a90cd385c11f1682. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/HKI190305008.
Vivaldi: Dixit Dominus / Gloria / Nulla in Mundo Pax Sincera
Purcell: Theatre Music, Vol. 1 - Amphitryon / Sir Barnaby Whigg / The Gordian Knot Unty'D / Circe
Amphitryon, Z. 572, "The 2 Sosias": I. Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16172a936545690a0ac694ad9c0fee9abf2320d7bf6ac3da8684f169d512b331. 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/HKI190744801.
Amphitryon, Z. 572, "The 2 Sosias": III. Hornpipe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef708a5d33df562c74fa650cf657b2c0002811cbb2708fb653c5c89a0eba92a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HKI190744803.
Amphitryon, Z. 572, "The 2 Sosias": Celia, That I Once Was Blest (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1b4989941839f3b263b89e356a0cfb7388381339e608e8b2de72057c32d861. 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/HKI190744804.
Amphitryon, Z. 572, "The 2 Sosias": IV. Scotch Tune
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16488ab45253b58f484f87dd846726d761c65d79ce0b840d80f4cd63b5334593. 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/HKI190744805.
Amphitryon, Z. 572, "The 2 Sosias": V. Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d4af87c1f99deb90055c68fdc2ec9b067d487525a76abdeff7fd7f32ec4d2d. 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/HKI190744807.
Amphitryon, Z. 572, "The 2 Sosias": VII. Hornpipe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633e9d25f48cd6d35186d77fc3b3668a34e1b1a15e4d737f7c4df56aab3ce052. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190744810.
Amphitryon, Z. 572, "The 2 Sosias": VIII. Borree
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b45828d50d52f0d942efa2954d9e21fd2e95b8305db53ea8ac91af10ae35f0. 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/HKI190744811.
The Gordion Knot Unty'd, Z. 597: Second Music II: Minuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3536933e06fc6692dfa9596755a3874c4621d56e37aa72df58c7add47d20e9c1. 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/HKI190744815.
The Gordion Knot Unty'd, Z. 597: First Act Tune: Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd640d682502fdcce5e5550930af8a94639d5ca3e93026aba03e55823de3066. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKI190744816.
The Gordion Knot Unty'd, Z. 597: Second Act Tune: Rondo Minuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e2b7b3083360fbd00c5388ff0e6b0878fd7d921bc89acccd95e35fac1a88d6. 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/HKI190744817.
The Gordion Knot Unty'd, Z. 597: Fourth Act Tune: Jig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10629e99c8e970056d8c4694ea4c4b9705929a07d670f9e136944e2f51d7f2e9. 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/HKI190744819.
Circe, Z. 575: Their Necessary Aid You Use (Tenor, Bass, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad27c595fa396b6b70f7db6ec24089f333f2cfdda6a98e34e1d62f805928692d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKI190744822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf75fe6352ec5d1bb61ee1b1ee9002e5f824893fb92f34a2494810e2cc8748d. 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/HKI190744824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe269ed9cf0528a3604ab0f34d269476ae1a69522fcdf747c9611ea24159e309e. 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/HKI190744825.
Amphitryon, Z. 572, "The 2 Sosias": II. Saraband
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79506a457d9ad975c07ddc267e2983bcf34861f1cc868a9540446ba65b9afe2d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/HKI190744802.
Amphitryon, Z. 572, "The 2 Sosias": For Iris I Sigh (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed021c2447efec5fb44ab2320f14fb241db4fa7cbe45828b029af33598c8b74c. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HKI190744806.
Amphitryon, Z. 572, "The 2 Sosias": VI. Minuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e869748c314fdacd002dc357ff0b0e883727e2a01af14b9e7e28350f388f6f. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/HKI190744808.
Amphitryon, Z. 572, "The 2 Sosias": A Pastoral Dialogue Betwixt Thrsis and Iris (Bass, Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b98ec02038c00c217d51965028a2576923b0eaaf8864983564146d59cb8c8fb. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/HKI190744809.
Sir Barnay Whigg, Z. 589: Blow, Boreas, Blow
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6def44cebbf71b4fa462bd7164f343206b7c8fb75066bf9b10a9520f87db94c4. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/HKI190744812.
Circe, Z. 575: We Must Assemble By a Sacrifice (Bass, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab4e17133add83a6bfbbbb79902c11e58ace2f4d4c0b6ee86a2fb5adb1baec6. 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/HKI190744821.
Circe, Z. 575: Come Every Demon (Tenor, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d756177afea5f987793563cfede6a88ada9e1565d8fd4b7d2cbb7e42607806. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190744823.
Circe, Z. 575: Lovers Who To Their First Embraces Go (Soprano, Alto, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726939bf4f3275455d40bf6346e34dbe6b30819c7163fcb763e7eaf6b6b1dcbd. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/HKI190744826.
Beethoven: Piano Sonata No. 32 in C Minor, 6 Bagatelles & An die ferne Geliebte
The Indian Queen, Z. 630: Trumpet Tune: "The Indian Queen", Z. 630: Trumpet Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcb937c4611382a5771dbb79691d47981f6d9e9036513163251c6f9e56cd4ec. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKI199737519.