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 0xdca7027b2dde7704ede87653817d18e0eef10658ecec77b6b1471d3bf4d3e28b. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fad6c5b1-1f5c-4f11-9d1c-9a74822d2ca2.json and https://artists.proofprofile.net/proofs/artist/fad6c5b1-1f5c-4f11-9d1c-9a74822d2ca2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lullabies, Renowned Melodies, And Piano Classics
Piano Sonata No. 14 in C-Sharp Minor, Op. 27, No. 2 “Moonlight”: I. Adagio Sostenuto
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 0x936ca92074913363451d1d0bbf6533c27a6582dd0fd0373a44846ef0b1f0f8d3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USCGJ2126878.
Piano Sonata No. 14 in C-Sharp Minor, Op. 27, No. 2 “Moonlight”: II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6a435a4c5e008142c6229a59fa70399ec931329c4fa60fbcc0f5c1b9fd1125. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:01:45Z), 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/USCGJ2126879.
Bagatelle No. 25 in A Minor, WoO 59 “Für Elise”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bcde4daf417145f197f46059422cdd0623fc899f0982dc6a0deaf3009e8751. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USCGJ2126882.
Liebesträume No. 3 in A-Flat Major, S. 541
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce470000bd15add220046f17dd8eb3474315cc97d972adfb2c508d2bfdecca5. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/USCGJ2126883.
Nocturne No. 2 in E-Flat Major, Op. 9 No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48a377fcb43c81569d35599d576e6d68b00badd0e8b03b61d32a54d5d648296. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2126884.
Piano Sonata No. 8 in C Minor, Op. 13 “Pathétique”: II. Adagio Cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47527617d94770b76c364cb88338515acab17d1360c9564bc9a8bb76d548e01a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGJ2126887.
Waltz No. 9 in C-Sharp Minor, Op. 64 No. 2: Tempo Giusto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317d221e19d4589e21723c04e4fef2329a47bbb0407429c6baec939d5a11f9b9. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:05:08Z), 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/USCGJ2126888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9509059dd3a41c8ca9819edfa45573560b43ce95c16608c2d44462ad5d71d6d3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USCGJ2126890.
Piano Sonata No. 1 in F Minor, Op. 2, No. 1: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a17737c9fc6b6e0c8c93d1c18ef650e9270af2ad201bc4aa17cb35d6bbfa95c. 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/USL4Q2102364.
Piano Sonata No. 1 in F Minor, Op. 2, No. 1: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446603c194c6492f710c847f8b91fcafaeb9dcae143884e1760fc748d47029c6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USL4Q2102365.
Piano Sonata No. 2 in A Major, Op. 2, No. 2: III. Scherzo. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ef9b2bcb97bc566ba825c35a320714d64461b429ba5f4239ec57f08b7113f7. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USL4Q2167067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cf7830d4660873407133542128f6bbb15bbef9eabc99036cd095e6baa29e21. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USCGJ2244772.
Viennese Sonatina No. 1 in C Major: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed30a4d735df2a8b4c3306e23b9a0a211eb2a17e60061b7506d76a49248cdff1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USDY42290940.
Viennese Sonatina No. 2 in A Major: II. Minuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7245305bab22bb45731d3a8166f9dfc7c6e5c24070f0a32d64558eb010a9ad24. 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/USHM22212080.
Viennese Sonatina No. 2 in A Major: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc9a2739007aff91da8c1d99ea06b4fd3479e76a86df9c151d7d1f59f60f0b2. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USHM22212081.