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 0x264ac6420f2427f9bf39a0cebe0291880538566f4146e1d61e541aaed2980b05. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c842d908-f1ee-4ad6-9afa-141275d13fc1.json and https://artists.proofprofile.net/proofs/artist/c842d908-f1ee-4ad6-9afa-141275d13fc1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Missa brevis, MWV B. 57 "Die deutsche Liturgie": No. 4, Ehre sei Gott in der Höhe
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 0x9a419c138bb06e0ed831d7e3962fbdc5c04b2e00bbf53357938afabdc28bdadd. 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/NLE422306408.
Denn er hat seinen Engeln befohlen über dir, MWV B. 53
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d3f1810766629713072f51bdec771ccdb5c85b15f800af39c958dcd2a72d73. 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/NLE422306412.
3 Motets, Op. 69: No. 2, Jauchzet dem Herrn, alle Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeab84c26c48d0cd9731d74c3c4950128f44011eefb82b268b3f5453bf90b785. 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/NLE422306414.
3 Motets, Op. 69: No. 3, Mein Herz erhebet Gott, den Herrn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49c57aa4c53d1a81ec151d05acdbb42f9fd942ee71c55f52e81dfead1012e9b. 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/NLE422306415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c81c811c65c5bbc3efab95187e564edfa751c590d17daa263536d23e134e4d. 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/NLE422306416.
Psalm 100: "Jauchzet dem Herrn, alle Welt", MWV B. 45
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522ac55d4bec36ae01293019fb48b359a0586ec42e591e83869fc7aacf9b7176. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLE422306401.
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
3 Psalms, Op. 78: No. 1, Psalm 2 "Warum toben die Heiden", MWV B. 41 (Revised Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e655dc909306458dcc55a8335fba52140c260007e6ed1f24fb919345dea7df9. 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/NLE422306402.
3 Psalms, Op. 78: No. 2, Psalm 43 "Richte mich, Gott", MW B. 46 (revised version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c325c0c7fbf436b6b46318206b867201c2960a8b379f53ee4ae949d89e1e9a. 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/NLE422306403.
3 Psalms, Op. 78: No. 3, Psalm 22 "Mein Gott, warum hast Du mich verlassen", MWV B. 51
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcc0662945d33988a67c972fdd32c2b9fabb2aa2c0636e921841ec8272747f5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NLE422306404.
2 Sacred Choruses, Op. 115: No. 1, Beati mortui
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc482e2a9f7907e72c70f85069e77dab2d230790a9ec816bee372993fa30e80a5. 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/NLE422306405.
2 Sacred Choruses, Op. 115: No. 2, Periti autem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7849e6f626808e94bfe6f3c304ac52de18872169897d835d96f885a953ce187. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306406.
Missa brevis, MWV B. 57 "Die deutsche Liturgie": No. 3, Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd866f2af092b3e4ec50ece9b9a62c86139e34897b98046375123b9185172e3eb. 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/NLE422306407.
Missa brevis, MWV B. 57 "Die deutsche Liturgie": No. 10, Heilig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b93786e24580f83bd1bdc52deff4111128c2c4b55b13c560bb7f2ae703b4cb. 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/NLE422306409.
Zum Abendsegen "Herr, sei gnadig", MWV B. 12
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753de364977e1750fafd4b71c0123cf1dab0f084f73a1b677d8423c7944970ae. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLE422306410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccd6ec319f38e843524feedc62ab69f3904756a383631373082425349dade25. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306411.
3 Motets, Op. 69: No. 1, Herr, nun lässest du deinen Diener in Frieden fahren fahren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146e9242bc180611c163075d6f3de60e60882c26727f65cdbc78f6cd0226bf05. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/NLE422306413.
Die Schöpfung, Hob XXI:2, Part I: Die Schöpfung, Hob XXI:2, Part I: No. 2, Im Anfange schuf Gott Himmel und Erde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4328c330f749853e5c5cfc680eb6f162a4c6f5de1d476bf7bc26b2866439a7. 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/NLE422320502.
Die Schöpfung, Hob XXI:2, Part I: Die Schöpfung, Hob XXI:2, Part I: No. 5, Mit Staunen sieht das Wunderwerk
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f329373e9f33c62f9ce286cab363d37da55a1eab73292e477d2f9c7624b88f8. 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/NLE422320505.
Die Schöpfung, Hob XXI:2, Part I: Die Schöpfung, Hob XXI:2, Part I: No. 11, Stimmt an die Saiten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfe507d9770dbe8b320bd523828c77e9bad48856adee9d19a0c1d0983f49af1. 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/NLE422320511.
Die Schöpfung, Hob XXI:2, Part I: Die Schöpfung, Hob XXI:2, Part I: No. 3, Nun schwanden vor dem heiligen Strahle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b50b85c1d73f9aa37baa54efff5ce0d2f2054d15256df3af1f6e42279d4511. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/NLE422320503.