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 0x30dacd5dff883bd0bb9a1061ebc67b75412793ae7665607d2a4b23a44d20a7a6. 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/e8303f24-fb70-40d3-9dc0-d17239446c3f.json and https://artists.proofprofile.net/proofs/artist/e8303f24-fb70-40d3-9dc0-d17239446c3f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Préludes Op. 28: No. 13 in F-Sharp Major
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 0x0a3f99077b3feaf7007ce7a17217749b339110c4602a9d7fcebe030f2382379a. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/DEZC62177625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e3e298416a8ef8ead0630a6831c03b00f499cd2d69ed62571a2ef241f8f02b. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DEZC62177613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb418d73e13c6654c6c2d1c8e66ab25116785244b1883db180a9213ccce250d66. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DEZC62177615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa86afa39c3b211058e5e6fd712ceceff11b457cf9bee70b18c77ee2aa8f0520. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/DEZC62177616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87acac5c04bdc8bf1033ea3bdf3e1cb496f0aa069a1afb9493ed7c4c9fbf04b0. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:31:19Z), 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/DEZC62177612.
The Well-Tempered Clavier Book 1, BWV 846: 1. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8584114fd82d19d026dbc94681aecbf52434bd937aa210b2edee72e8892039f0. 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/DEZC62120960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c7ceb1ed83a14f76b6706ea6c6bfab2dbcc79e09604b8505de573d0e29c5e2. 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/DEZC62120962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab82310f76dc6f25ddfe97429cc598ddb545ba7f50a0de039f5af746124500b8. 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/DEZC62120965.
12 Arabesque, Op.6: No. 4 Moderato Con Espressione
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f61e314f8e7a7dd4d6213325d0d37e65ebd664b90f909d667f5fd9ebb96156e. 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/DEZC62120968.
19 Norwegian Folk Tunes, Op.66: No. 19 Gjendine's Lullaby
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23df0f973552bf4dd0c4e9f4adbbd6109fea62915dbb2f9e7d4470876fa1d447. 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/DEZC62120971.
Children's Album, Op.39: No. 1 Morning Prayer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425e6fc403cae5711577543ef98d1dc7de60dc16ceb9d874da8f73404dd63ce1. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEZC62120976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aec7a394917e799d3f6df2d4b22ed9c13aa5181a8a6d34fa3f7dd965cbc0c11. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/DEZC62120982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f58ac6149c2f50d31d04d1f870eae8fb2672801f0d8a4268cf09be077ae861f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEZC62120986.
The Well-Tempered Clavier, Book I, BWV 846-869: Prelude and Fugue in C Major, BWV 846: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8584114fd82d19d026dbc94681aecbf52434bd937aa210b2edee72e8892039f0. 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/DEZC62120960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c7ceb1ed83a14f76b6706ea6c6bfab2dbcc79e09604b8505de573d0e29c5e2. 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/DEZC62120962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab82310f76dc6f25ddfe97429cc598ddb545ba7f50a0de039f5af746124500b8. 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/DEZC62120965.
Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funèbre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c0d5e1bfc5fe50a3f656f0c512286a8ee2b9ea319c886d1fa11f18f6dcb6de. 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/DEZC62120966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f61e314f8e7a7dd4d6213325d0d37e65ebd664b90f909d667f5fd9ebb96156e. 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/DEZC62120968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23df0f973552bf4dd0c4e9f4adbbd6109fea62915dbb2f9e7d4470876fa1d447. 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/DEZC62120971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425e6fc403cae5711577543ef98d1dc7de60dc16ceb9d874da8f73404dd63ce1. 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/DEZC62120976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aec7a394917e799d3f6df2d4b22ed9c13aa5181a8a6d34fa3f7dd965cbc0c11. 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/DEZC62120982.
Peer Gynt Suite No. 1, Op.46: I. Morning Mood
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e34e107882fcd24e194c894c4c205a0bf9513769d7535b44f9467b48f2237f. 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/DEZC62120984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f58ac6149c2f50d31d04d1f870eae8fb2672801f0d8a4268cf09be077ae861f. 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/DEZC62120986.
Suite No. 7 In G Minor, HWV 432: VI. Passacaglia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5cfb121aff2f89f4f4284b9a0e6c72f25dbbd511256f6f5984de99236a79ed. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEZC62495203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea24c9587f59a89af43e3512e8e04a98816f5b5f2eb922cdfeb2e8f0f36bd75e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:54:39Z), 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/DEZC62495204.
Sonata No. 14 "Moonlight" In C Sharp Minor, Op. 27 No. 2: I. Adagio Sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa40b9dc9c9bb709bf8f066e1ef3940ea8305ebede96c7f4ab9108e66fce4f9a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEZC62495209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d42d7fcc5d79ff979dd1b79c584e387341ebbd591f79dfaecea9762d96e9ba. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:30:38Z), 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/DEZC62495211.
Préludes / Book 1, L. 117: VIII. La Fille Aux Cheveux De Lin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30bdece1392e54e64878413be49320b54d606b720b9b046d678bd21149a4c21. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEZC62495214.
Keyboard Suite No. 4 In D Minor, HWV 437: III. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c0c03982351e553ed6641b507ed4dfbc12d3f5e721c598cf7d895fdac4e8d2. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEZC62495218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990e51d313e67b579873e9b9ad1a7bec650069be9a373681c42f95bcbec656de. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEZC62495219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3102ac408d77392e29f2a2b680cd80018aac74ad93c01d0869a586a0a11ff046. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DEZC62495205.
Goldberg Variations, BWV 988: Aria Da Capop
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71746fdd3fc6ba7318a23dfae718e7358bab84d1297db13d34aa8f448d52f686. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEZC62495207.
The Well-Tempered Clavier, Book I, BWV 846- 869: Prelude and Fugue No. 22 in B-Flat Minor, BWV 867: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cfa8de69008cfad077149aa63dcbcca699016009a58a493ea269ba26837977. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62495208.
Suite No. 11 In D Minor, HWV 437: Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3a996f2af24efb4b70a59604b1311f2384c5db7c4f8cd504fa3f77c7b96d00. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEZC62495217.