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 0xd2ea56de7aa4fb4881ee95de63bfd75683678f71fd7bbac55e5e4a5f5be23077. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec13d8a0-7df9-44b4-a1fa-749523c0a253.json and https://artists.proofprofile.net/proofs/artist/ec13d8a0-7df9-44b4-a1fa-749523c0a253.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Emotional Lullaby, Classic Piano Masterpiece for deep sleep
Satie : Gymnopedie No.1 - Lent Et Douloureux
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 0x73729d4f3c3d5dfd72ec843f68a0a05dd0309832e1561b54037b9f05b1419c5b. 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/QZEKE1854959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe374c6d30c667e36302f9352130d577a30ce1280f37cfe1873d95699d910be5. 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/QZEKE1854965.
Chopin : Nocturne No.2 In E Flat Major Op.9-2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e64e137e97d6b8db7b48de038bba6c70ad56023f41ac7156bc27424b16d4015. 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/QZEKE1854967.
Bach : Anna Magdalena's Notebook Book II. Minuet In G Major BWV Anh.II 114
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa901c057c1d5208239c31173f238d9a366fc44e9452d252cd05bc910420c243c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZEKE1854969.
Sentimental Classic Masterpiece Best For Deep Sleep
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830fdfed9dfd78a1e022e576443b1509af4d11eb9ec17f6bb9fa8588ecb33a05. 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/QZEKE1852122.
Beethoven : Piano Sonata No.8 In C Minor Op.13 'Pathetique' - II. Adagio Cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811455e557cd83184a9ec00fbe2c3c13811f4fa1526d467813aa5971aa53e94f. 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/QZEKE1852123.
Brahms : Wiegenlied In E Flat Major Op.49-4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c99b42e61a5594bc626b8e010951559eb20df51183defdcfacb5170ba6378f3. 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/QZEKE1852124.
Bach : The Well-Tempered Clavier Book I. Prelude No.1 In C Major BWV.846
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdb0cc990a95bd2d69e1d30b82c8d9ee8bf536c4574738c9eab94293f74551b. 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/QZEKE1852125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801860729a2f8d2534f61590a26fc254f5828e35faf4fec386777325daf3eea9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZEKE1852126.
Grieg : Lyric Piece Book I. Op.12 - I. Arietta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445bc9e954fa7b26eda675f322cfee7614fc56e39df5339247b25a5dc8538bd7. 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/QZEKE1852128.
Bach : Suite For Solo Cello No.1 In G Major BWV.1007 - I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d35527d6443b3d70364ff635fc2644ddfbec9defb0ed359e16c93d957cba82. 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/QZEKE1852129.
Chopin : Prelude No.15 In D Flat Major Op.28-15 'Raindrop'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444fcf0b1007103ade09fdce0715fb1d903374a7c16cf46b0b996c3c50ae0df3. 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/QZEKE1852130.
Grieg : Lyric Pieces Op.54 Book V. - IV. Nocturne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc143fc6a30476c1fb7470392d203578807f23bdc4fa3c89288dd080471f73f53. 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/QZEKE1852131.
Mozart : Piano Sonata No.11 In A Major K.331 - I. Tema. Andante Grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5d9495239eeb41c85b298cb3a18d441b30c9b979ab25561f0b243f42c4e4ad. 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/QZEKE1852133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c90a8a2a52222a08126533cf0a60aea283128ae2e2bf6e7d54ed53ad245d689. 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/QZEKE1852134.
Mendelssohn : Songs Without Words Book V. No.6 In A Major Op.62 'Spring Song'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12943871b3028f2eefc6dc6a3c7d30b2f1692c5da7221b185928006bc87b9ee7. 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/QZEKE1852135.
Brahms : 4 Ballades No.2 In D Major Op.10 - Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8824058dd0d1d70e938d68d7711e2a23bf5bf6650b8c41d24442d52270f3f3c0. 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/QZEKE1852136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee031c8bcd5ee3018004361616938ac07090087c54fff122e410ed0dce3965d. 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/QZEKE1852139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766da414014f4c2b9870dd5dcd2045ce7b9b00764e3036879a81eb5b7605a7ec. 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/QZEKE1852140.
Bach : Goldberg Variation BWV.988 - Aria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d42ca5fae04b011e229089e4957df4d85b759e9aaf33c2796bce9f5dea4b6e. 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/QZEKE1852141.
Faure : 3 Romances Sans Paroles No.3 In A Flat Major Op.17
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37105424d2dcdb55ee193f6981b37c35fbcd392b2264821530d60470eb75ac13. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QZEKE1852127.
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
Chopin : Nocturne No.1 In B Flat Minor Op.9-1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4a005575aed1102f22a084ee82c60473387082eb8a90bb7617cb3cc5143dd6. 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/QZEKE1852132.
Faure : Nocturne No.4 In E Falt Major Op.36
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb511b8f1e43e947ff47b4afb1d552bb2a5a64c17544a48fd2470439f7ec14ef2. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZEKE1852138.