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 0x593f80d68aba69222af3dc889dab78aa851d1d4cfcd228331f258cf2c69e6c52. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/030e173a-ecce-4595-abe8-6e455d2faa17.json and https://artists.proofprofile.net/proofs/artist/030e173a-ecce-4595-abe8-6e455d2faa17.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 0xc2f0b813ce7df4d101eae3a6dd11c5ace0c833b7468f655d1a2de281fe186759. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEW740311007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7ec1b81e3cbd059973f7dd8c9137f53a6e5b871505a06a481f6e77ace859b6. 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/DEW740704014.
Jesu, Meine Freude BWV 227: Jesu, Meine Freude - Choral
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29877b19905a6a5022194e569d9f8af7bd30f692fafc3ff4401c1b00fd537262. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:03:49Z), 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/DEW740704015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ff409d5d4d653949d2b4849dc32584b9119b21494bf3dbc455251ec68dd6c3. 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/CH6542154177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f6a6f71c6e1e5025b4cf8eb352ec8cd652b900ec2a1a66028be8b5a1bbd6b7. 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/CH6542154181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d22fe571df3bd2b4c6c4a0822b0cff93a58a02a304ce3bd94a340f064cf176. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CH6542154179.
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 0xbb6c81165e1575b2f125771312e51288013c4158dab922a1496c7e16906b0a3d. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/CH6542154188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6963e052a59a80be9f8baf8ae3c85b67d7fb522f7fa7e1ff8cc8c0a1e8b425fe. 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/CH6542154190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3ca8392071f2a8d836c0288fe7b5ed594891edd5b319cb39ed961301b73124. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/CH6542154194.
Acht geistliche Gesänge, Op. 138: No. 1, Der Mensch lebt und besteht nur eine kleine Zeit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf378b6ff92e876dcc3531a177997d8bf40eabc2181cc4b9cb197a7ac45380224. 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/DEW740803002.
Hausmusik. Zu Gast bei Robert und Clara Schumann
Mythos 116 (Psalm 116 - compositions from the 17th and 21st century)
Gottlob! nun geht das Jahr zu Ende, Cantata BWV 28: I. Gottlob! nun geht das Jahr zu Ende
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351dea4c595c64f66805ca43ff78b30cfa62f096e867df27b085dcf3901ca711. 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/DEB111303101.
Orgelbüchlein, BWV 599-644: Ach wie nichtig, ach wie flüchtig, BWV 644
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eeb0820f234fad661d3ea5c96bc76c09ac48a7fb299fc115f39eb1affba94c6. 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/DEB111303105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a62ba989371db3f495687f64e3980a4eb57ed02518860d49b22edbc114c0086. 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/DEB111303110.
Wachet auf, ruft uns die Stimme, Cantata BWV 140: I. Wachet auf, ruft uns die Stimme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1330009f8ea8fd1b2b515597ec976f2e4cdc338a2ed825a40baec41dfe5795. 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/DEB111303115.
Ach wie flüchtig, ach wie nichtig, Cantata BWV 26: I. Ach wie flüchtig, ach wie nichtig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8d6f504a20c096efb58994fefa82f91a2a93c79aa7000c0829dca890ab473c. 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/DEB111303106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc75805565692d87d7f58bdac8c83f83d26da57d1045749e8318e4f6b848e4ff. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEB111303108.
Ich will den Kreuzstab gerne tragen, Cantata BWV 56: V. Komm, o Tod, du Schlafes Bruder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37dc46c3f8b45f742ac61fbaf3ea8e3a51e1978fdf776d8f46cc76905d639ea. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEB111303112.
Weihnachtslieder aus aller Welt (Vol. 1)
Weihnachtslieder aus aller Welt (Christmas Carols of the World), Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf048691e4d8185e50ef6a3f450bb2d5a8d80abfbaa98a4ba45a66afbde99869. 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/DEB111609401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7377b6394e8c348f5aded4502a24e49dbb94307ae773350461151d1246f03b89. 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/DEB111609402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a12578626776f9187340b377325653d491cdd819a2adf7bef8b6290f9a925c2. 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/DEB111609405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb713df62551beded52695b7b46dcf7b8ca8d18d6906070b2b313c2a4e29fa035. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DEB111609404.
Wascha mesa - Passa é mezo Lamillanesa - Wascha mesa: Nachtanz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbd0672175fceb7313cd97755d6b7374b5a7daa4a1f981bdd551ad165c7606e. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEB111609410.
Missa L'homme armé sexti toni: V. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bf6ec1df4ef3916d33e07a2af0ec837f4b6322c7a32213d73cf07f4d540406. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEB111609419.
A Nightingale Sang in Berkeley Square (Arr. for Vocal Ensemble by Gene Puerling)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1b093897b5198e51007c465ce7c51215ae6057aefd10ba5d4e68169b04dc7d. 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/DE1JB2442710.
Hallelujah (Arr. for Vocal Ensemble by Juan M.V. Garcia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f261e25e8bb1f48035d1875d90e5c03a3ada17947c1a25d86f0e9f69ed9b7ce. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DE1JB2442701.
3 Ausgewählte Madrigale: No. 1, Lasso, perché mi fuggi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938ec74df4ca339c1c355a807853e33b9215381111b5d51e6120eb9de0860f74. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DE1JB2442702.
Morike-Chorliederbuch, Op. 19: No. 2, Ein Stündlein wohl vor Tag
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f1c1004f332ada8d7e792c8e368a08850d339643d4d96b54e0eecfd7cde7f9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DE1JB2442705.
12 Deutsche Volkslieder, WoO 35: No. 5, Da unten im Tale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f5429cfb09e57a11539aae9e6b9a28358ef1f8e718d16f790cf1d4591a61a3. 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/DE1JB2442706.
14 Deutsche Volkslieder, WoO 34, Book 2: No. 8, In Stiller Nacht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f490bafcac0405c74e6b91564fe5be01a73b7ee2148bd789f8170863f924121. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DE1JB2442707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4697eea734ef32f41a89040b3248add7ad4c1065e0f88781b591c9ce69b724b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DE1JB2442709.
Another Love (Arr. for Vocal Ensemble by Juan M.V. Garcia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafc3d3e0723c3cb87e68bfd6c452889c21a6edb6fb0daee6956c3ae590c6ac9. 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/DE1JB2442716.