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 0xbe061654c9f57e990e4cb30127b06e357feb3a3171a5c36eb2e103c0f2898fb5. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7128e482-ca64-464c-a6ea-d62accc993b7.json and https://artists.proofprofile.net/proofs/artist/7128e482-ca64-464c-a6ea-d62accc993b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
2. Notenbüchlein für Anna Magdalena Bach: I. No. 37, Willst du dein Herz mir schenken (Aria di Giovannini), BWV 518
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 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.
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.
Musicalisches Gesang-Buch Georg Christian Schemelli: I. No. 44, Vergiss mein nicht, BWV 505
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc05caa3b0736dbb9ac06763b3c35d4d6a1a58bbb54f642ea92d68e0cb8b3749. 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/SEAEU2461330.
Der Herr ist König, TWV 8:6: I. No. 6, Aria: Prahlet, Ihr Völker
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e08e58ddb63bb04f344bd26b25f877e72563994791f67785affc4557296a79. 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/SEAEU2461060.
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
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. 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.
Musicalisches Gesang-Buch Georg Christian Schemelli: I. No. 37, Gott lebet noch, BWV 461
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc0442963925fe26d4c446820652da0d630ac27cefb90750eca36bfd451b170. 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/SEAEU2461300.
Musicalisches Gesang-Buch Georg Christian Schemelli: I. No. 42, O liebe Seele, zieh die Sinnen, BWV 494
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0b92b5345fac7a36abfb6b7665236a5f37361ef0ba820c3d9e954087048bfb. 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/SEAEU2461320.
Musicalisches Gesang-Buch Georg Christian Schemelli: I. No. 53, Jesu, Jesu, du bist mein, BWV 470
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee1cf61cc5327a3631e913ebc1e706242fe8945aeedfcb7bbb8e3d27f210a71. 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/SEAEU2461340.
Musicalisches Gesang-Buch Georg Christian Schemelli: I. No. 59, Komm, süßer Tod, BWV 478
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefb14ef324c5b216524a2e305614e17fbda703deccdc10981ce1d365378682f. 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/SEAEU2461350.