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 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 0x7726031a135edbe9d7873135ccda2ac273045f8e14ec51fdff02a4d24f2b4b63. Chain 2 (Bitcoin): anchored in block 953923 (2026-06-16T09:51:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1be91420-49f9-4293-be1f-02c32e5825a8.json and https://artists.proofprofile.net/proofs/artist/1be91420-49f9-4293-be1f-02c32e5825a8.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Also hat Gott die Welt geliebt, BWV 68: Aria. Mein glaubiges Herze (Soprano)
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 0xef9b2bd5b06c9706493ddf3de730aebe8f850e67994586f9d055ca8b17ae2577. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841020 — a six-check JSON result.
Also hat Gott die Welt geliebt, BWV 68: Aria. Du bist geboren mir zugute (Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a4dd547d652924b31cc2f6ad1899cde5c22a408149991e2ce44e6e7025d117. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841040 — a six-check JSON result.
Also hat Gott die Welt geliebt, BWV 68: Wer an ihn glaubet (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b8b419914332fef1885506dc4270c3ec01b8b967bfca111d9c068e5332f3fc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841050 — a six-check JSON result.
Sie werden euch in den Bann tun, BWV 183: Aria. Hochster Troster, Heilger Geist (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7f52c572beb901fc7f44203e09b9e75618eaaaf5177a87811b400e4b20fa79. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841220 — a six-check JSON result.
Also hat Gott die Welt geliebt, BWV 68: Chorale. Also hat Gott die Welt geliebt (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedecc041a7c46c7f7406539fd4a853fabd159050068d87a2dbea99680199c062. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841010 — a six-check JSON result.
Ich bin ein guter Hirt, BWV 85: Aria. Seht, was die Liebe tut (Tenor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26546203e18cde82f332ea896769803d4499afd37186e7482410651bb8556d0e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841280 — a six-check JSON result.
Also hat Gott die Welt geliebt, BWV 68: Recitative. Ich bin mit Petro nicht vermessen (Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e939ea131392985b4a22fb3f901dd14d109673498ddbd87b59ba3ba88cebcc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841030 — a six-check JSON result.
Er rufet seinen Schafen mit Namen, BWV 175: Aria. Es dunket mich, ich seh dich kommen (Tenor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3107e7366d031e8bf404b9c3837db2caec74c7f8b7cbeabbb3ffd89f9b121191. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841090 — a six-check JSON result.
Ich bin ein guter Hirt, BWV 85: Aria. Ich bin ein guter Hirt (Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b838e24acd2162be0b6670369c1eafd3d5bbc58a446a3e069d3c5b9e8407c7b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841240 — a six-check JSON result.
Ich bin ein guter Hirt, BWV 85: Chorale. Der Herr ist mein getreuer Hirt (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1254179939f3fad9cb1928a84990397951850df00704dc6e7f16c75cc383cf95. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841260 — a six-check JSON result.
Ich bin ein guter Hirt, BWV 85: Chorale. Ist Gott mein Schutz und treuer Hirt (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bf3dcc0262f1800acd3bec3161e49800a79b0cd32cef48554ed95e54bcb568. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841290 — a six-check JSON result.
Er rufet seinen Schafen mit Namen, BWV 175: Aria. Komm, leite mich (Alto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ff980211c5860f554da684fa5e8da5ff1c04533b21caa8a37da95254488ec1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841070 — a six-check JSON result.
Er rufet seinen Schafen mit Namen, BWV 175: Recitative. Wo find ich dich (Tenor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218421c012ffac0033e10ea867ba682ad5ce45304a0002d1c5ddd3ce764ad124. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841080 — a six-check JSON result.
Er rufet seinen Schafen mit Namen, BWV 175: Recitative. Sie vernahmen aber nicht (Alto, Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb335549d236829a323e089f64805268c2d62441455b72f60236b5fbbeb05ed3b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841100 — a six-check JSON result.
Er rufet seinen Schafen mit Namen, BWV 175: Aria. Offnet euch, ihr beiden Ohren (Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3413d7f8d658c5c60a3516680e801c8341936491ba7da52a4a17d84231e5bc71. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841110 — a six-check JSON result.
Er rufet seinen Schafen mit Namen, BWV 175: Chorale. Nun, werter Geist, ich folge dir (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07ba99bf3a77435521e013f4b71142423554b9fc5f137bab179466e49b3df21. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841120 — a six-check JSON result.
Sie werden euch in den Bann tun, BWV 183: Aria. Ich furchte nicht des Todes Schrecken (Tenor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31617b392465900a7b43a9c0989128ec0f82029d29fa35b56dcfa23f74b5db9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841200 — a six-check JSON result.
Sie werden euch in den Bann tun, BWV 183: Recitative. Ich bin bereit, mein Blut und armes Leben (Alto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c5919c947a65cd1939456bc932dfd6f0843ecd98a8747b12086e19b10678fe. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0841210 — a six-check JSON result.