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 0x518657d50d14dea8fcadc8dcad79d78e9dc97cbefa851bb1fde8e2538d64608e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bca020e1-02da-45b1-9800-607ef68f2a9d.json and https://artists.proofprofile.net/proofs/artist/bca020e1-02da-45b1-9800-607ef68f2a9d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Winterreise – Erste Abtheilung, Op. 89, D 911: Die Wetterfahne
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 0x5b60a4c5ac966b5a5a2cf0bd5e0ea6d66cb251947347c770695f2cbeff1f5f24. 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/DET902384702.
Winterreise – Erste Abtheilung, Op. 89, D 911: Der Lindenbaum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462c474bfbed5dfb400b1c6199861fcdff799080851206d9016cd693e5eac94a. 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/DET902384705.
Winterreise – Zweite Abtheilung, Op. 89, D 911: Die Post
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe243952e05bf4c330c23cc46631380067e3051b7e031a6c801ca96c083fa98aa. 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/DET902384713.
Joachim Raff: Welt-Ende · Gericht · Neue Welt
Mendelssohn, Felix: Wer Nur Den Lieben Gott Lasst Walten / Kyrie in C Minor / Sinfonia No. 3
Wer nur den Lieben Gott lasst walten (Choral)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ef1043d04b5517a3a89db14e20194ee82140bba6f5bcf36dd435871de78deb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET900811802.
Wer nur den lieben Gott lasst walten: Aria: Er kennt die rechten Freudenstunden (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab416e765b0bfe7aee2e76019439f63370f37cb64535fb6d5d4d9a9d7df559c. 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/DET900811803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda967940f40b48f457cd4ff4b3833c9fe338f892fd7603180f661f96cecdc788. 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/DET900811806.
Wer nur den lieben Gott lasst walten: Sing, bet und geh auf Gottes Wegen (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7e0b09884c1bb562b8ede2b3124717aa6d2c3b9a9d94cfd871ca95fdd791e1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:54:46Z), 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/DET900811804.
Singt und klingt! (Weihnachten im Gewandhaus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb456062e678bf25bcb4d920b59c62e917e3a39df5215caecb125ed2e13a7e76. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218f13abe81a6daa23fb372fa11d8511f92083feaa1df79a0f60d9c2e7aeaed4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAYC1900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812f4c3bedc419a76fa7dd5a94b0e838c59df62bfa817641b8b5310c392e75da. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAYC1900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf630a0669e976cca61a07f8a26fbffd26845da087b093e76483c8e89caeea59c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBDYG1802326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f9f8269111cffffc31bf80e187bc1123e5bd5f5aa9023c904546f7088b283b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAYC1900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3aaf139f97e9ad19141b4ea20a458384590b2ec1ad5010934293f0f6fd0d240. 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/GBAYC1900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240206725374a8acf163af89a8fff0d94e1a452c9b94d962052d3a0bb14d7b1f. 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/GBAYC1900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69630f5e76fe3701256d9a001b9f5a2d8de2302aecf582ac1b93e9dd260665e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAYC1900109.
Overture "A Midsummer Night's Dream", Op. 21, MWV P 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e1c09eaacf3f05cbea4c6dd68834eccc040a493ccfc3683987e33ced9e8c27. 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/GBBBA0500300.
"Lobgesang" in B Flat Major, Op. 52, MWV A18 / Sinfonia: Allegretto un poco agitato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524bb5689a3ce79df5b20f4958d4a5ffb9289dbe93692dbe0a1cc1536b82449e. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-21T17:31:37Z), 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/GBBBA0542002.
"Lobgesang" in B Flat Major, Op. 52, MWV A18 / Sinfonia: Adagio religioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5ced395019ddd4633c267607a3414f6e3fb7be0ea1c592193ab99001c72438. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/GBBBA0542003.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Alles, was Odem hat"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9aba9746eb847d0571f3093af48fd8c61b67738428445f0a4f7e0650ad43029. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBBBA0542004.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Lobe den Herrn"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3151e8628e60f6e662d74522cf5ce16f17148184fef8de0fb9476dc2cb051e04. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0542005.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Ich harrete des Herrn"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966b492ff7403b49776b76185f1f4981e32baeeb6540adc6e6cc48aa5b8af18d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBBBA0542008.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Nun danket alle Gott"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9545f04faa92a52788e69964691e3d9b8508756a4b2d001f3c6c100c6e028f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBBBA0542011.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Drum sing' ich mit meinem Liede"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6f0e23a205c17da8dc7c9564a9ef1b652781c79527745e2908ebab94179a21. 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/GBBBA0542012.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Ihr Völker, bringet her dem Herrn Ehre und Macht!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e3f3b4a782664c4e82d69d91c1052da0739c5e0c9271de18a511597aa4b96a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:22:05Z), 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/GBBBA0542013.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Sagt es, die ihr erlöst seid"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5deeed5c4d1179fa99c1098929088f5bc31d9ce054323262d5a60b1398c67244. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBBBA0542007.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Die Nacht ist vergangen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee8c7af1f8c16a0e51154bf3c1c55d453a3f7e850d45a9538d4b0c61587b3b8. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBBBA0542010.
Beethoven: Symphony No. 9 in D Minor, Op. 125 "Choral": IV. Allegro energico, sempre ben marcato (Excerpt)
Symphony No. 9 in D Minor, Op. 125 "Choral": IV. Presto - Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede2e03b838338560331f6809bbc876edd92e105ab3eeda7b8c2c4b5186429ad. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBBA0801794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240206725374a8acf163af89a8fff0d94e1a452c9b94d962052d3a0bb14d7b1f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf630a0669e976cca61a07f8a26fbffd26845da087b093e76483c8e89caeea59c. 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/GBDYG1802326.