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 0x332cd82175a90bacbf9b35272bca3519d495a3b7e870f755d68c10c6727230d8. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d74d8c9f-f9f3-43c9-9c4c-9d5ae1bfe4d0.json and https://artists.proofprofile.net/proofs/artist/d74d8c9f-f9f3-43c9-9c4c-9d5ae1bfe4d0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Weiss: Concerto and Suites for 2 Lutes From the Count of Harrach Manuscripts
Concerto pour 2 luths en do majeur (I: 24-37): III. Adagio
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 0x8cedd7c47a1a295d1bc3ed7402e99775f180f34350a38126cc18ca4586c47214. 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/CAJ720753803.
Concerto pour 2 luths en do majeur (I: 24-37): IV. Gigue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72a9a14d3a5023f3dae2db8553dd37c7a80a8554c3019d25d7db1e333841cd9. 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/CAJ720753804.
Suite en ré mineur (II: 59-64): I. Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f349fedf31ae34b8b357ea732e2cf8d1c52a249e51533216d7ae27c972a39aa. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAJ720753805.
Suite en ré mineur (II: 59-64): IV. Gigue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e8b1b511cef7f848045fa341020b2ef47ce0ff6ec1eabe774b2f6496eb8bf3. 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/CAJ720753808.
Deux pièces en fa majeur: II. Ciacconna (II: 77-80)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39afcaeb069c5b4978ab8afb8bf3256cc1de846e35cfd53da8556052eadb13b. 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/CAJ720753810.
Suite en si majeur (I: 114-119): II. Allemande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd555ce795c00dc8e966423d29f3ccee852b1f2ccadbea2ec58e631786f45065c. 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/CAJ720753812.
Suite en si majeur (I: 114-119): V. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efc1169a01298fe94983a023c39fbca4016c2634d72791084a498bb663109a4. 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/CAJ720753815.
Deux pièces en ré mineur : I. Sarabande (I: 104)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882b2d00777de17d9758d5937a626aaa08d883a0e0979a5e17fd59bf93c6d2da. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAJ720753817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f52a29dc8d41a5ce9e82a69a163207ced2061d725cd5e1a91c5ec417a4a46a2. 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/CAJ720753819.
Suite en fa majeur: V. Menuet und trio (I: 88)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf36bcb2d71abfddbd0990d9ab1d9974b9e06d9b8589cf4f654f967e5160cee. 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/CAJ720753823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35147ca1949dd5362a76b354d608aaa4aa3ba5a6bc520e3d6a4661de836b6fb0. 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/CAJ720753824.
Suite en ré mineur (I: 65-71): I. Prélude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869d3f6aa06747aec82dab748612126edaf08a345ec6739cf6cbb85a216c32ca. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAJ720753825.
Suite en ré mineur (I: 65-71): II. Allemande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166cde13144999f0dc222bd11620f149f329f87e70949424ee5eaa56e49bd006. 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/CAJ720753826.
Suite en ré mineur (I: 65-71): III. Courente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841aeb27b94bd13d6258db70d22b923f5f7157509d7cd23e41c99d3e7604c69d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAJ720753827.
Suite en ré mineur (I: 65-71): V. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b937180d6070a4de258f5f9caaeed077f04172b58b2556d058dcd5f0ae2dea1. 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/CAJ720753829.
Suite en ré mineur (I: 65-71): VII. Rigaudon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505159259aaf93b953bd29563394821a26a951fd80e17af7f0d928a93275cf91. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAJ720753831.
Suite en ré mineur (I: 65-71): VIII. Menuet II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84659853e2750791621b5f5da0715594668a9856667eaff0f872a40c0cf3bfe6. 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/CAJ720753832.
Concerto pour 2 luths en do majeur (I: 24-37): I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033ecbc116be96c3ecc6ad7bbbca62059372615cb81264eb6606b624320a9ff5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAJ720753801.
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
Concerto pour 2 luths en do majeur (I: 24-37): II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170f122f47b2d8a8dd919dbff812396e5e2136e7fec50a3c4591ca575ec41290. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAJ720753802.
Suite en ré mineur (II: 59-64): II. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4d6cedc5fef7929ffd9acfde6b380af96c52ea948cc2f7b63bf6eb1ca795d4. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/CAJ720753806.
Suite en ré mineur (II: 59-64): III. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43441356fdf2d60a3c1ae3cd223fedba36730d7c9e5f0b0c24175fd28ce05d7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CAJ720753807.
Deux pièces en fa majeur: I. Sarabande (II: 75)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3b15e5e48caeed5e4b1ebbf22062fb1a1c24edc0d4bf5515a8d6411450f33f. 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/CAJ720753809.
Suite en si majeur (I: 114-119): I. Fuga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e4ee4c38fbaab3201eb42659af18c889db7786d184e2feb95b9fc221641a6b. 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/CAJ720753811.
Suite en si majeur (I: 114-119): III. Courante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4aab19727d41da80645dd11a87bccd6260f173363f04cdcd286ea566edd156. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CAJ720753813.
Suite en si majeur (I: 114-119): IV. Bourée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ead97f50b92b0985d37b3f7a7e4b8d5b2d9e02aa8720490b128f43488a5154. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CAJ720753814.
Suite en si majeur (I: 114-119): VI. Gigue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa967809a152318788e8abc6c296d0f3ce30d78c1a96d7c10a6751b7069986e7e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAJ720753816.
Deux pièces en ré mineur : II. Gigue (I: 105)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5029deb02e1bd58d6c4023973c9fbd2bbd217f1301ee94a6a8a83e15731bb215. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAJ720753818.
Suite en fa majeur: II. Courante (I: 86)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e27f14744576202ab1cf4eec7e6cb3673bb6fcda73c55d91aa61e5acf6acb0. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CAJ720753820.
Suite en fa majeur: IV. Sarabande (I: 87)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744877608d76662e6e771c86f9afe949cfd521da689f72a9279e32cd1ea20e51. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/CAJ720753822.
Suite en ré mineur (I: 65-71): IV. Bourée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536049d64c9be45a25a7b5b5188126631343e81f98f67fbf3185aca32cf2ddfb. 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/CAJ720753828.
Suite en ré mineur (I: 65-71): VI. Menuet I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c2cd04f03aa426b7ea3ea02b0e4d45a57d1dba333cbc416c6067b51c38a947. 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/CAJ720753830.
Suite en ré mineur (I: 65-71): IX. Gigue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c0fb15174b92127314a6c678019ef1d6e0f562ab61715627966cdd487b24c4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CAJ720753833.