Johann Gottlieb Grabbe (1585–1655) was a German composer. A child prodigy, he became a member of the Bückeburg Court choir at 11, learned the organ from Cornelius Conradus, succeeded him as organist,
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 0xee4a4e27f470cd6422ec879046b02aece7a1745f6e561d704f20f8cc8c68fb41. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efc39194-8933-434e-bfc7-d170f5ccf0bc.json and https://artists.proofprofile.net/proofs/artist/efc39194-8933-434e-bfc7-d170f5ccf0bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cor mio, deh, non languire: 21 Settings on Guarini's Madrigal (c. 1597 - c. 1700)
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 0x23df1ff55f90ed40db7d2cac6e4512cebc081480d7953df40fbb4af0a0cb3142. 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/ES7141500571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e7b5bb172e697f23d262e1ea0d740637e1419e8aa1421b1107358d80ddda62. 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/ES7141500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71102b6451f98dda53e560afee44fe583b6d18c5c230355bb907f17534d0a62e. 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/ES7141500581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29178ec281ef17d82b2489c5c2993a371ef22b1de3ff8cc5059bf6bcaa1a8704. 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/ES7141500583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b5db5eedc4695f60270e1dd34057fd0746c53ee77ad39e4e1cf87957772bbc. 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/ES7141500584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26e97729dcb6b55c6b1f986aca1c74bc589464e188013a80c99cda54cbc7203. 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/ES7141500589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd366acea8aaa6d690cbba066f33f58802cc03f28994f45c776c635872d8cdc. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7141500579.
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
An Englishman Abroad: Consort Music by Thomas Simpson (English Orpheus 6)
Mascharada: Music at the Bückeburg Court of Ernst III
Dass sich wunder alle Welt: German Advent Songs
Abendmusik / Evening Music - Buxtehude, Tunder, Grabbe
Alles, was ihr tut mit Worten oder Werken, BuxWV 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813565e1f660c1e91e5eddcca6f8451c00fb4a16a69aa94a207bcf586e8db3fa. 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/DEE472400559.
Prelude in C Major, BuxWV 137: III. Ciaconna (Arr. for Renaissance Ensemble by Katharina Bäuml)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68373a2d5c56b7ccd3f486acafae4f9852940063c1105a6db45bf07229f0e140. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE472400560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b77e5467a3b8d54bfc808c0f96b9f914937c7fa7d7c6a08ec938fd7914b6c6c. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/DEE472400561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b4eec1e378bda6ae5e23bd74bb64c8656ff9a4908c052506a7d6d3ba85f365. 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/DEE472400562.
Missa Brevis in A Minor, Bux WV 114: I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fc60e38a4f9f8452ce10df3c2483931c6c7b6363dbe072932bcad398139ad1. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEE472400564.
Nun lasst uns Gott dem Herren Dank sagen, BuxWV 81
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cabbbedb069dfde8e02a09672b277839c2aedd01c3d0891157106322910f21. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:19:59Z), 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/DEE472400569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc255ae85d80a096198912510a38622637096cd0bfb52db6756f85a20d4b9fbd5. 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/DEE472400570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7a9992cde1608a996597ca4f68aca23f5a3a07a999db9f556508c18ce8a22c. 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/DEE472400573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a906c0141ca9d2afd2b9865d4ec3b11322120dd53d12be009448eb63f89f60f. 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/DEE472400576.
Der Herr ist mit mir, BuxWV 15: Alleluia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f248be5aa6c0f583b2d7e0d7440acd37f7d8c8c748939f518011d57338d7ad. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE472400579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c23e1f37545b0440680221662bc634645e549722b8a63e6e2e9075036a168f. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEE472400568.
A Nightingale Sang in Berkeley Square (Arr. for Vocal Ensemble by Gene Puerling)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1b093897b5198e51007c465ce7c51215ae6057aefd10ba5d4e68169b04dc7d. 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/DE1JB2442710.
3 Ausgewählte Madrigale: No. 1, Lasso, perché mi fuggi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938ec74df4ca339c1c355a807853e33b9215381111b5d51e6120eb9de0860f74. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DE1JB2442702.