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 0x8c8877413f368a2f2c5ca978de287b4cf070c4c72df840f5696a76b894732a78. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2fad35c1-6a7b-4c62-97df-b01d0951688f.json and https://artists.proofprofile.net/proofs/artist/2fad35c1-6a7b-4c62-97df-b01d0951688f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
6 Romances, Op. 38: No. 3, Amid the Din of the Ball (Live)
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 0xba44052c5b496852606f1177257fbc86bb74aa9f0e9fc9aafff8b7ca36274fb5. 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/SEAEW1444040.
6 Romances, Op. 6: No. 6, None But the Lonely Heart (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb587a568dd9409343235b0bf7cf93ea5e8e4c9009c2bac7868ea904c855ba8c5. 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/SEAEW1444050.
Recorder Sonata in F Minor, TWV 41:F1: I. Andante cantabile (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c319a51c88c64ebb926af6c30aa01ca5a29188f91ba0b45ba191d322d7cc652. 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/SEAEW1444070.
Recorder Sonata in F Minor, TWV 41:F1: III. Andante (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998e5b5217278c8049a8f87440807a45ea44380536e5d026a1e40b90a364ed84. 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/SEAEW1444090.
Recorder Sonata in F Minor, TWV 41:F1: IV. Vivace (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca4b736a505a8ae31783c01de4a9fb9af2ad7ab246a6f8c9ec6bbc66cb3ec12. 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/SEAEW1444100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00280fca2fc9dda302b49d2fcb70b0ed80bbf1703f14150671fb328cc339a8b. 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/SEAEW1444110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0bfd375267fe897cc61d075026ff9852c3214e357527c38d26fc349099e2f0. 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/SEAEW1444020.
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 0x304a7b82f2f295a472c4aa41a15880b7f8de1338854a02bb4498bf95729b6b11. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/SEAEW1444030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84fe84cfd28e6c155aaac8bd2b155b4bdedea74420e04b9574642bc419c1925. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SEAEW1444060.
Recorder Sonata in F Minor, TWV 41:F1: II. Allegro (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b56a7cc98c19cd61448b3119c4c836991885fdcdb157dcf9ba2a35b444434b. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/SEAEW1444080.
Adagio & Allegro, Op. 70: Allegro (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6696acfd3f4a84660c16ffbee4fe3cf0aa51d3a4a9ff6506a839e5b9fdabafe4. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/SEAEW1444120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd255d5bee27a9f92594bb3a699a50709c9fb7373589c2570b2b70be1cdc2c8. 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/SEAEW1444140.
4 Ernste Gesänge (4 Serious Songs), Op. 121: No. 1, Denn es gehet dem Menschen wie dem Vieh [arr. For bass trombone and piano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc127f54b78ccd22977b70cdaab539a5747ccf9d685bed57a04e7960b9d5a67. 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/SEAES1024020.
4 Ernste Gesänge (4 Serious Songs), Op. 121: No. 2, Ich wandte mich und sahe an alle [arr. For bass trombone and piano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf290b17bea8569f78d1d2aac5575102d43522da979e348e1dc39cf6bd9983fdc. 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/SEAES1024030.
Concerto in 1 movement (Arr. For bass trombone and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9efc45d3dc4c9c216cd384ed063813a7f25001bcfabca94d7132503cf9bfcab. 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/SEAES1024070.
Sang till Lotta (Arr. For bass trombone and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfead12d6655afda14728ec9f4698c36cc17471cbb7a309740f58c0a898537e90. 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/SEAES1024120.
4 Ernste Gesänge (4 Serious Songs), Op. 121: No. 3, O Tod, wie bitter bist du [arr. For bass trombone and piano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7f652d526ec2caec1034b08fdfe54f6d75be9f1a450526ecec7a225df9c9e7. 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/SEAES1024040.
4 Ernste Gesänge (4 Serious Songs), Op. 121: No. 4, Wenn ich mit Menschen - Und mit Engelszungen redete [arr. For bass trombone and piano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6624df9e418cd02790c8b7f011a0695fd0f1aaaeac0e7ae0acac693a8660a01c. 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/SEAES1024050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b628e0488e1c569998691c2faf6b24e76c83541a49d16c33da0db82765b5ee. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/SEAES1024060.
SubZERO, "Bass Trombone Concerto": I. SubZERO
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf01c5bd058fc2f25052ddcb049318cfcf831c758215f49c9771f603a75f925f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SEAES1024080.
SubZERO, "Bass Trombone Concerto": II. Sama'i Thaqil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6660544b46cafdcbb747d743b223b66317258f860fadfa51f52c474c2efede38. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/SEAES1024090.
SubZERO, "Bass Trombone Concerto": III. ZOOM OUT
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e7ad0d30720f432de5477362893fb19340da2e8fd32c3f60296654bb7855bb. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/SEAES1024100.