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 0x3b4ba5660f6a5edd0d1a2c10186ad85d2d6c46bf46a89c17eaea0a01435ab8de. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4498b03-bff3-4d0c-942a-2754e905c889.json and https://artists.proofprofile.net/proofs/artist/d4498b03-bff3-4d0c-942a-2754e905c889.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
2. Notenbüchlein für Anna Magdalena Bach: I. No. 13a, Gib Dich zufrieden und sei stille, BWV 511
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 0x43a4f57255e3b621f7604742359f46cf8e02fe0722be60bb198300aed759848e. 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/SEAEU2461110.
2. Notenbüchlein für Anna Magdalena Bach: I. No. 20a-b, Erbauliche Gedanken eines Tobackrauchers, BWV 515
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cc72ac0bdbc4ae815bab8edaf1d02e1c3188989789b7dde0afaea886a07b15. 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/SEAEU2461120.
2. Notenbüchlein für Anna Magdalena Bach: I. No. 33, Aria: Warum betrübst Du Dich, BWV 516
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f83b81973f22848c38fb00d6953556fef4136510becfa54a68ea1fdf501e1b6. 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/SEAEU2461140.
2. Notenbüchlein für Anna Magdalena Bach: I. No. 38, Aria: Schlummert ein, ihr matten Augen, BWV 82/3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c5031109ad25729b7db0b3d53a0b671372dfb27d0ab7f57943e4ed1e288a8b. 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/SEAEU2461160.
2. Notenbüchlein für Anna Magdalena Bach: I. No. 37, Willst du dein Herz mir schenken (Aria di Giovannini), BWV 518
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7f998748c85d27f53f000015bc9d629fed193a3b7ce7ab6e9bc8391305aee1. 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/SEAEU2461180.
2. Notenbüchlein für Anna Magdalena Bach: I. No. 39b, Chorale: Dir, dir Jehova, will ich singen, BWV 299
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f358ca2c7233d4930da13bdb72193e2802d63d4ac618a433ed6a8876f0fb5ca. 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/SEAEU2461190.
2. Notenbüchlein für Anna Magdalena Bach: I. No. 42, O Ewigkeit, du Donnerwort, BWV 513
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30fb7c660070204a0b315eb255f3db7ea9278b2fe70a0833a5f6becf0185c7d. 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/SEAEU2461220.
Musicalisches Gesang-Buch Georg Christian Schemelli: I. No. 14, Ich steh an Deiner Krippen hier, BWV 469
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20b955b076b06f6f6a9a46017b4f8a7904cf2f7903ba96b43e439d03078fff6. 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/SEAEU2461230.
Musicalisches Gesang-Buch Georg Christian Schemelli: No. 30, Gott, wie groß ist deine Güte, BWV 462
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10587c372b5ce5cdec34fab5c9282391229d9fa80867dc285a0d42695cb6192f. 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/SEAEU2461280.
2. Notenbüchlein für Anna Magdalena Bach: I. No. 12, Gib Dich zufrieden und sei stille, BWV 510
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e886ddf8671b30ec333c093a44011b9cc8eb76607893c077692207b6ebc358. 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/SEAEU2461100.
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
2. Notenbüchlein für Anna Magdalena Bach: I. No. 25, Bist Du bei mir, BWV 508
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1c076e5dabaf983c5a761e9792c8b5c288b4107f729d92d52e4f558d82e4cf. 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/SEAEU2461130.
2. Notenbüchlein für Anna Magdalena Bach: I. No. 34, Recitative: Ich habe genug!, BWV 82/2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6e104b5ac0fd56d4d08815ee219590565fee26c28c12b7327792fc3c65905c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SEAEU2461150.
2. Notenbüchlein für Anna Magdalena Bach: I. No. 35, Schaffs mit mir, Gott, nach deinem Willen, BWV 514
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04ef12f39e55d6fd641694a55a2fb66b58a850879e4e3b89f0bcc8f9e6c7c32. 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/SEAEU2461170.
2. Notenbüchlein für Anna Magdalena Bach: I. No. 40, Wie wohl ist mir, o Freund der Seelen, BWV 517
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4044d8d69286b6b06b043f2093596e4223e98c54445b5f7ae07203c4d988c2f7. 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/SEAEU2461200.
2. Notenbüchlein für Anna Magdalena Bach: I. No. 41, Gedenke doch, mein Geist, zurücke, BWV 509
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bd40492a941fbae9bb9e7876e9fc4e824cd523f28d1defd54e370d972bb946. 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/SEAEU2461210.
Musicalisches Gesang-Buch Georg Christian Schemelli: I. No. 16, O Jesulein süß, o Jesulein mild, BWV 493
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03675069e9dc22b89a7af7f2c27f9c0038f69d8f92ad1d546c5eaab16e19ab0e. 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/SEAEU2461240.
Musicalisches Gesang-Buch Georg Christian Schemelli: I. No. 18, Lasset uns mit Jesu ziehen, BWV 481
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d2ae7d990c5883ff02d592138ce81b8b47db2bfc6ef29b175e8d2c852d7600. 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/SEAEU2461250.
Musicalisches Gesang-Buch Georg Christian Schemelli: I. No. 19, Mein Jesu! was vor Seelenweh, BWV 487
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2264162c961fabb7b267487c87691f0194ab755ffc625610fee5aaa6843b4c2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEU2461260.
Musicalisches Gesang-Buch Georg Christian Schemelli: I. No. 29, Brunnquell aller Güter, BWV 445
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea035384d7683b9c85b8d8d24b5554120d9ec1b21457b02fee02e13182a17a9a. 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/SEAEU2461270.
Musicalisches Gesang-Buch Georg Christian Schemelli: I. No. 32, Dir, dir Jehova, will ich singen, BWV 452
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69730b5296776ae24a1d1e354581899e4819fdde9e765805dbe29d49445780c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEU2461290.