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 0x770bdd46b4281c2a0df6b403a46c676609c71aa02dc2bb7fe8a6c03e16733e83. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd02ea5b-668d-4f26-9d43-1ecc0aab7320.json and https://artists.proofprofile.net/proofs/artist/bd02ea5b-668d-4f26-9d43-1ecc0aab7320.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Peter and the Wolf, Op. 67: Peter in the Meadow
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 0xd0e3f21009d46e5dda540d98c66183f0bc1e83a08bc8648cd1bbccb7c22363ca. 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/HKI199287215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c34a23e305e8466bf359696f6a6495ef7c4860a905bb6e8fd09c10653aba0f3. 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/HKI199287216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404f17d0a1efd44d98f1fdadf75486bf23ad4c95bfa4c3a1c2c839684afacf1a. 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/HKI199287217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9be2298232393686aedf00bf3ea83a9b29f5d00c687fee2ef081486565997d. 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/HKI199287218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30f831de980c5da440e2de07b810cf9997aa07c81bb4050e52f7ec1368dbef6. 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/HKI199287219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbca8768174347f5f0ca7d5361a397c485bba8905959bc76fc841420e621cda. 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/HKI199287222.
Peter and the Wolf, Op. 67: The Duck Jumps out of the Pond
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4378f76b980fb6aa33ea191b1172e87d4752a32eaa677828160fad8e76b7dadc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI199287224.
Peter and the Wolf, Op. 67: The Wolf Swallows the Duck
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa0b18681e5fc39ff37de2fcc7a82687757aa5681d4a8c8f5e0fb7f6b75960e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI199287225.
Peter and the Wolf, Op. 67: The Cat and the Bird in the Trees
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476980639e98990846156c92969bd68d1f36e171e7243679776a46e3740b1f53. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI199287226.
Peter and the Wolf, Op. 67: The Wolf Prowls in Wait
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778c2445992e7ad818b7d1f1b60598208deb14efdea6f9e3dde181a8c2104c91. 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/HKI199287227.
Peter and the Wolf, Op. 67: Peter Takes a Rope and Climbs the Tree
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0048673488ee9ecd29fdb83fe843057f80d00649027236ec732d0faf6c47022. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKI199287228.
Peter and the Wolf, Op. 67: He Tells the Bird to Distract the Wolf
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c22d37efb8119452ff582cb8406812dcfcf9e5231980a6dd5f5b81522dccc58. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI199287229.
Peter and the Wolf, Op. 67: The Wolf Tries to Escape
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9820fc9b2a30353722ca1dc539569e3410b4d1d4febcf1bdb1fd5258457d9881. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI199287231.
Peter and the Wolf, Op. 67: The Hunters Approach with Their Guns
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb630bdaa648cda3aeabc5c65ac146b1932d27ce39281368da798b606ca49fad4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI199287232.
Peter and the Wolf, Op. 67: Peter Suggests They All Take the Wolf to the Zoo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b91e5e45ea3e715aabe48abc2c570b60734d76de69e76c21c11f0301604fd0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI199287233.
Peter and the Wolf, Op. 67: They All March Together, Peter, Then the Hunters with the Wolf
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17abf7f6c03401ea8dc82525f25421bdabf373ac168bf5034a911cc038f9bd24. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKI199287234.
Peter and the Wolf, Op. 67: And After Them Grandfather, Complaining, and the Cat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8a2b6ddf7af3a76aa76f48502d0923e3fc9d1f00c6e2a7a6d8c3099f0ba1a8. 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/HKI199287235.
Peter and the Wolf, Op. 67: Grandfather Takes Peter Home
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dd674f2948e06fb0a15be4e2060be1a7fb2395e6a6d08c8ed107ae82ef394e. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/HKI199287221.
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 0xda7919b9196214c0847bf7c83fbf977f89c324afc08cb6f888ffaaff59c7ff57. 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/DEA580600138.
12 Pieces for Organ: III. Toccata in G Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee244fddb18cce551093d0da60ac20630594d8593456b4e9e4abedaadf3ba616. 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/GBC7N1040613.
Herz und Mund und Tat und Leben, BWV 147: 10. Jesus bleibet meine Freude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4637fdcd3277721190a46667c7d927255fe1f078f280a5d06469e317801396. 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/FR10S1547887.
Suite for Orchestra No. 3 in D Major, BWV 1068: II. Air (Arr. for Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80aa3649e900036ff28b486bc9ef11587c07509da16e8ada8d7d8549980a55a. 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/DEA580900502.
Organ Symphony No. 5, Op. 42, No. 1: V. Toccata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e1b2e7f55bd7fa2288a26daf70c12cf17c7dd5a370dfa4722f386d33c65d41. 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/GBC7N1046716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2356571d33e1d5133a8607725e0df6d86fb7f529bcf6940ca6847b1b259df153. 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/GBC7N1040608.
Pièces de Clavecin: Le Coucou (Arr. for Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a58667eb8ce7a1d21400391df49266f12cce081c77fe1ea4e031bce92af2883. 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/DEA580900417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be9663e92cecd61d5e01dc80a37c3a49f1ed33bed518549d5976f9d8b9c3ecb. 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/GBC7N1043801.
Prélude and Fugue No. 3 in E-Flat Major, Op. 99, No. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fb0f6c4bc725847e0108e632ff4a7d8ab07edf685bfba364ad09a275a6c945. 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/DEA580601163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8df0971a24e8af98e9ff251d537af7b270fbf53c1cd1cb33a6a8c3de671b18. 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/GBC7N1040601.
Organ Sonata No. 4 in E Minor, BWV 528: III. Un poco allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4daf8b6d175d111a5c5034886c8f0d7ec7b93d90dfb9bd798c5a6bb09f86be. 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/DEA581800287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c4a97842eb90cabacd8c1a0a288b963c96c34447b087f4f08824367fe6c9b8. 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/USX761218706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d5e81b5a8efcd303049588de0412081d52f62f0f8f3f6ec9cd3b193c6f732a. 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/HKI191953502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f4d247ac7975cce9b82fea33b76323d6bdac1657f2a2ddbed0262adfa80c2f. 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/HKI191953509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd958567c2a68630a16f0b43a4d109bd06d1b7081de8171ba0c98dd54502686. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/HKI191953501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86733f0e5f01c98c2f06b9123a4cb821b69844302c7a5f22a40ddd989aa6fd24. 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/USAB10612257.
Blah Blah Blah & Other Trifles: Cabaret Songs
Prokofiev: Peter and the Wolf / Saint-Saens: Carnival of the Animals