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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf49db96f7aae77956026dd0492a426b8ab8e8b07b478b23e8faa9f86a02a4f. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf98c053-6adb-428a-a97b-842b07052c0d.json and https://artists.proofprofile.net/proofs/artist/cf98c053-6adb-428a-a97b-842b07052c0d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony No. 1 in C Major, Op. 21: II. Andante cantabile con moto - Live
Orchestra del Maggio Musicale Fiorentino
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7428fa9938c41cd180a68125c13c1e90d1155caaa701bec9ea9886b98a1dc9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:08:49Z), 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/ITN322321097.
Mozart: Requiem in D Minor, K. 626 mit Werkeinführung (Live)
Johann Sebastian Bach: Johannes-Passion, BWV 245
Mozart: Requiem in D Minor, K. 626 - Neukomm: Libera me, Domine (Live)
Requiem in D Minor, K. 626 "Missa pro defunctis": VI. Benedictus (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce369499071375e0901f7e688857568a0a26d248f397493841c71a808daf2de. 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/DELW72092531.
Libera me, Domine (After Mozart's K. 626): III. Quando coeli movendi sunt [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c588553f5871c67c0433d382acf327260c6892d8c8c35fa473913d26e402f49. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DELW72092536.
Dvořák: Stabat Mater, Op. 58, B. 71 (1876) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf38f7fb8766a6556b662ed67eb5ebffa96b44aedb7b158bea2a7729e53d490. 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/DEU921706801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d0c2099c944a5e10c1d59ec8637bb464092a5959a987f230b1a7d138f5f0ae. 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/DEN961831101.
Die Zauberflöte, K. 620 / Act 1: "Zu Hilfe!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e5914e69f0480e1991d1efc7eed177e8a5c7df549c4aa35047f36ba02485a3. 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/DEN961831102.
Die Zauberflöte, K. 620 / Act 1: "Der Vogelfänger bin ich ja"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a8cedc5c143f6fd8510b970cbdced678a3408eecb860bc48943cd2bf5b3d41. 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/DEN961831104.
Die Zauberflöte, K. 620 / Act 1: "He da!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc993ed195f706c63e80b6db93aca5ccb327e86814a6bddc4a3c30a261ec71c0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEN961831105.
Die Zauberflöte, K. 620 / Act 1: "Dies Bildnis ist bezaubernd schön"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240669e35c3257115f151e4e361bf83f0ad425c0b7f13e8d311dd0f8c3687176. 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/DEN961831106.
Die Zauberflöte, K. 620 / Act 1: "O zittre nicht, mein lieber Sohn"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72aea3f93855fe53674154c1d514c46064c97d877a33fd103508aba9679b35f2. 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/DEN961831108.
Die Zauberflöte, K. 620 / Act 1: "Zum Leiden bin ich auserkoren"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e831dc533bcda9bd1cba8affa3635076b58d3133465ef129b98b678e107be5a. 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/DEN961831109.
Die Zauberflöte, K. 620 / Act 1: "Hm! hm! hm!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0911f202cd56bca8bc266a7b565b3fc7e5fc85dd61eabc07881af6439ca70b. 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/DEN961831111.
Die Zauberflöte, K. 620 / Act 1: "Bei Männern, welche Liebe fühlen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d0c1a0431d16fde334d92f683a9b88f1dfa34908fd4fee34dda6967e4139a1. 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/DEN961831115.
Die Zauberflöte, K. 620 / Act 1: "Zum Ziele führt dich diese Bahn"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139ff8ad6ed0ef0ac5be1bbea17c9d851dcbf828d38354f230e1a395ef9690fc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEN961831116.
Die Zauberflöte, K. 620 / Act 1: "Die Weisheitslehre dieser Knaben"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e1cedb7f1bf443c1ca45631aaecf4e6982fa277a65f810c91c628888460f72. 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/DEN961831117.
Die Zauberflöte, K. 620 / Act 1: "Ha! Hab' ich euch noch erwischt!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c9a66641263ca83d31198577bc4e159d00ac8e156f3b7d5fc57d4a61821c28. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:01:39Z), 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/DEN961831120.
Die Zauberflöte, K. 620 / Act 2: "Der Hölle Rache kocht in meinem Herzen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea254804c1764a99e8bfcec5154a0f588614e5a7dde4334f2769bd247d0c909. 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/DEN961831134.
Bruckner: Mass No. 2 in E Minor & Te Deum
Beethoven: Missa solemnis in D Major, Op. 123: IV. Sanctus: No. 1, Sanctus
Beethoven: Missa solemnis in D Major, Op. 123
Missa solemnis in D Major, Op. 123: I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698aa2e4a32ed549b3090ce1b53065350694b6f27854be9c6990975d03563b4b. 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/FR50X2411101.
Missa solemnis in D Major, Op. 123: II. Gloria: No. 1, Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8533b8445a6d8a783ce5c2b27a8f26b6a1f05095c9211fa4ac55043290f1c06. 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/FR50X2411102.
Ullmann: Der Kaiser von Atlantis, Op. 49b "Die Tod-Verweigerung" (Live at Prinzregenten Theater, Munich 10/10/2021)
Weber: Silvana, J. 87 (Original Version) [Live]
Beethoven: Symphony No. 9 in D Minor, Op. 125 "Choral"
Beethoven Symphony No. 9 in D minor Op. 125 (“Choral”), Presto. “O Freunde, nicht diese Töne!” (Ode to Joy) [Symphonic]