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 0x99c8c39bb90e55129440f6add5ebe3c92b72afc630cf284e081866723df3c546. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87c08be0-81c1-45fa-b188-743403b8b23f.json and https://artists.proofprofile.net/proofs/artist/87c08be0-81c1-45fa-b188-743403b8b23f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Choral Concert: Stuttgart Hymnus Boys' Choir – Ebeling, J.G. / Vulpius, M. / Praetorius, M. / Cruger, J. / Gastoldi, G.G. / Bach, J.S. / Silcher, F.
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 0xa479344ad5379f2b8ce2a462243d72cb5b23b5326709e2d44fe1f17da300c4e6. 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/DEA558719767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca88bf2b63ec5b5b06c9886b786c8a80dd25e4b29a254705ed2b3440343b81d. 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/DEA558719772.
Nun danket alle Gott, BWV 192: Nun danket alle Gott
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3597b63752d16a1cbb6a5ff2ec4aab4b7a3e68286a753c0106d4f317a1a313d2. 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/DEA558719774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bad0f8047a67c6133722d0f5c5cdabc0638f443c33cd8671f70018a2931eee. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEA558719776.
Ich bin ein guter Hirt, BWV 85: Ist Gott mein Schutz und treuer Hirt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957699f5f2ff715a8313f963275b100ed1c5555bc64704798cfdad973065d988. 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/DEA558719781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84e7c6d442d02f59811a070ba784ca01dc740edb8d31cf694c7477436261c2b. 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/DEA558719782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d08353fd9663fe2545724f15f49a59391966b093faafd816242f7c1fb041fd. 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/DEA550010780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7882341695654eaee8d0e9d2205c3958ba08d835f27ab2072840408ac3044cbe. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEA558719768.
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 0x66901fb06c02f3b87283633562e4e953368347dbb0d92d4dd4457603b7b2de9e. 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/DEA558719769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831061ae3e857c81ca123d261a0aade183c6acc341a70b71d8f2968c3b87ccbe. 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/DEA558719770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b0303d4bebb3fafab321be7661fab583fd7c9a15ea1581e406dd61ec61c2a2. 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/DEA558719771.
Dir, dir, Jehova will ich singen, BWV 299
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c8a62de990b9b867d2b1b141e90e6cd51bffed1661715931ea8bf91458bc1f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEA558719773.
Wer nur den lieben Gott lasst walten, BWV 93: Wer nur den lieben Gott lasst walten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953f74a37699255eb81c0b898d79a4e5025825e0c185f7814258f0c23e05b2b8. 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/DEA558719775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe145197b7137fe4c7ff2ec314dd63466724dacb89def41f5a0e30347ab4e5604. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEA558719777.
Was Gott tut, das ist wohlgetan, BWV 100: Was Gott tut, das ist wohlgetan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e025247734b8026889e2a20f32a3204117b1affc77645d9779356c25c02b8d. 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/DEA558719778.
Lobe den Herren, den machtigen Konig der Ehren, BWV 137: Lobe den Herren, den machtigen Konig der Ehren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b2b77fde9b93fdb9a8f937da57abb2a54fbffd48ba9e09607f9697206e9ad3. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEA558719779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687a88debb6ad41054c44c8c38db7db115b7113cc14a86d5b484826603ed9c4a. 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/DEA558719780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a39f583d2a7d69e6e120680405901889f56e03cc19bcf4c9147f5ba62f01f36. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEA558719783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc4afe49534b97cdddfc2d21d6d408d3e34821136dbe037451d3fe9760b7cc9. 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/DEA558719784.