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 0x1d3b749fa73de40af7d85d7115b7efa265546ad1cd3ecaeabac05a1cc8c4252b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5bd7758-6206-4024-b00e-b113a787f9ab.json and https://artists.proofprofile.net/proofs/artist/a5bd7758-6206-4024-b00e-b113a787f9ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x6033e28e5926f1f324bed321243eca1877f94c74ddf763f88538b5d4f675811a. 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/US4R31237701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d4d9cad675f1c82478bbd667695389c231bcfb53d33f621e049b91783bcdca. 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/US4R31237699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21d354492527da1e2fa41db8c719ca6c12acdb4e0cc39b0bd8a7f0fb216753e. 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/US4R31237697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78717ef0c7abe08b9a2ea4cf7756f942db59c3893ff75613d6e399803429b3eb. 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/US4R31237696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1236d2c556c1b13ed1750f7478ffe80f5c9b19a86f9313e47f430f66c5cb2e. 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/US4R31237695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb9dcdee2aea0e6ba4b055af09ebc9b5b2fee292f4c4f4e857f7c10fba1b9a8. 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/US4R31237694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaec715765c15d1aad5e67b33b2054b094c3946638679a589d0299857cfb15f9. 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/US4R31237693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7542b94f93976280c8f7ce2ae7b95cbb8a1919d288b9e141eceaa6ac3976ba. 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/US4R31237691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73577e274fa6a4d8030d87b590272a59df4e35b43c4371811b02370aaff4e42. 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/US4R31237690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95ff980da3d07311cee5de55a7d5328aca4db480d7d40c291ec874f20998cb9. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/US4R31237689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a650452fc87963095da61ca6d84912a6a2e02681802e0901cd0fa0d1b432ce9. 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/US4R31237688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613616303b1a87f4aa2081bb264e9dab80c25860ab6c85d4ac9bd7b83e3641eb. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:04:02Z), 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/US4R31301658.
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 0x83c19da4e17acea77a4abad64c5361475af465ab1bbbc7f6b7a62cc77128df61. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US4R31237698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8c4acec552ffb1189150ed3d3d160bdd74c670645f0c68d66c77a463d928fd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/US4R31237687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c134a5009a3ab09a0da148a865b4edc55f65edf7a48783fd2b880ce41fc2d13. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:43Z), 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/US4R30602780.
Classical Guitar Music for Sleep and Relaxation
Spanish Dances for Classical Guitar: Music of Sarasate
O Little Town of Bethlehem: Christmas Miniatures for Classical Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e40404eecb7ba81493a274f865904e09bf88951de1e6189e9715870139f5f43. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:53:38Z), 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/TCACB1474317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be9ae8908d12018356375abc8693d06c1b11009f7be0658b0010b354c773715. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:06:58Z), 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/TCACB1474322.
Classical Guitar Music for Reading and Studying
Water Music Suite No. 1 in F, HWV 348: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6be79c6ac439e0a7bd25ae6156242cad92e72ee2208d26581f206297452ffc1. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GBLFP1547834.
Water Music Suite No. 1 in F, HWV 348: Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6621b9cbf78943df4b3d6756c80a376eaec77e4d12da7b1bfe797029e7b7337e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLFP1547835.
Water Music Suite No. 2 in D, HWV 349: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe525e4f8e7167531116558cb0866fa4694cb5a1b01bdb951400573c83d0dc2e1. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:37:46Z), 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/GBLFP1547836.
Water Music Suite No. 2 in D, HWV 349: Alla Hornpipe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc967fa05abda7722a54df4ef3d3dfbbc3d2bacee2fd9cf814f4c635775d749. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/GBLFP1547837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181aa4eef2a5387f4b5522d0b79534b4d5feb09c6a112bc51c9d430a39b496f7. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GBLFP1547840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b1b733b712087e1a59306a65e4e4825d26d694d1e45aa4408e61efd49f761a. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/GBLFP1547841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28eecad82779ef4157ed89a32978560c979249ef217fa9c44971987ecc954e5d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:33:24Z), 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/GBLFP1547842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359ee73d1b3a846b2be0556f1ff4519be22bcd0c58cceeb8f56c906562b2dcd6. 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/GBLFP1547843.
Le Nozze di Figaro, K. 492: "Duettino" Sull 'Aria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9a9a9ad136fdf5b474b42d5a8640d73ec08dda0a613d6255adbc970e385882. 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/GBLFP1547844.
Sechs Kanonische Sonaten, Sonata I: Vivace, Adagio, Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5912e4eb28f817ba73c27d09047b3eff42fa370c4d935e0bd5881e1a4e29d9c9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBLFP1547845.
Symphony No. 6 in F, Op. 68: I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3181bc82983abb62b1f53c456ac39c1d8a31740775e8a53bd62a7ceadc1f9c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBLFP1547846.
Eine Kleine Nachtmusik, K. 525: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c04dc31f8580105ddf64a5fb5e0c4f6fb1c3f977c8e866ecb87a6954c39668b. 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/GBLFP1547847.
Eine Kleine Nachtmusik, K. 525: II. Romanze: Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6747aca96519616d8fc060ae756acc66fc7bff5172a7d1505fa2591ae163de. 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/GBLFP1547848.
Eine Kleine Nachtmusik, K. 525: III. Menuetto: Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5ab840e5bffdeabbb50075dee3a6e04dda5f5f8aff938cb035f3be3eeaf53a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:25:05Z), 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/GBLFP1547849.
Eine Kleine Nachtmusik, K. 525: IV. Rondo: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7614c70f572e805214d14d5f4e293173de615160f8e049ef50d5779eb14ac6. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:54:21Z), 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/GBLFP1547850.
Música Triste - Sad Music for the Classical Guitar
Russell Simmons' Def Comedy Jam, Season 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbf8dfbd113310f1abd75e0c4b93b037de70d28f494505ee19ad400ed132ced. 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/QZ5HC1600584.