thumb|right|Stich-Randall at the University of Michigan, 1955-1956 thumb|right|Feuerhalle Simmering, grave of Teresa Stich-Randall Teresa Stich-Randall ( Stich; 24 December 1927 17 July 2007) was a E
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 0x363fd38336bf885e606aa1d7883aa97f2eb332ea013bff026514eabde411b36e. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52ad9942-1504-4b02-a56c-37ea94160b13.json and https://artists.proofprofile.net/proofs/artist/52ad9942-1504-4b02-a56c-37ea94160b13.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Wolfgang Amadeus Mozart: Die Entführung aus dem Serail (1954), Volume 2
Messe solennelle "Du couronnement", Exsultate jubilate & Vêpres solennelles d'un confesseur
Exsultate, jubilate, K.165: III. Alleluia. Allegro
Kammerorchester des Saarländischen Rundfunks
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 0x6a273a664b647bb11a66d8afd21707000db9781835e2d5f59d69a4f3d4f5f925. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ396300920 — a six-check JSON result.
Mass in C Major, K. 317 "Coronation Mass": II. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee5e70ebde4203f46facf4281706ac49971fa60c2fa0a2c889aec975a3a54f6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ396300960 — a six-check JSON result.
Mass in C major, K.317 "Coronation Mass": 3. Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4024f1e60e6581bdce5118dbf8b454de191b8a369302dc44f2b2eddfd70eb748. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ396300970 — a six-check JSON result.
Mass in C major, K.317 "Coronation Mass": 6. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18268f1b4cecdd4804e2310baf1fc8b2210a374cb206b8e9549df216efdf929. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ396301000 — a six-check JSON result.
Vesperae solennes de confessore, K. 339: V. Laudate Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d37ec8ab233b0e7c1c220e7197e50d76bbf1330c9e5c3929e1cf0db9522465f. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ396301050 — a six-check JSON result.
Bach: Cantates, BWV 78 & 106 "Actus tragicus" (Mono Version)
Die Zauberflöte, K. 620: Act I: Arie: Der Vogelfanger bin ich ja (Papageno)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ee81aaa65ba1f62accb6f069d633838c5cf71195227d7dd9927285eaf8c67a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0945005 — a six-check JSON result.
Strauss, R: Der Rosenkavalier, Op. 59, Act II: Presentation of the Rose. "Mir ist die Ehre widerfahren" (Octavian, Sophie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e6e989454d8a7a412d57722ed773a11d4a2113220a0816769ded9c3881b494. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1701689 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79dd0d3a21ef6c892451608f9ba14cb5a88cf3df73c4c90b5f0b4c9de7effd3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0945001 — a six-check JSON result.
Die Zauberflöte, K. 620: Act II: Terzett: Seid uns zum zweiten Mal willkommen (Drei Knaben)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319c4a529b6b2fc3158b358a6ba7b1d84933620c037f17ff15e35a871f097595. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0945033 — a six-check JSON result.
Die Zauberflöte, K. 620: Act II: Finale: Bald prangt, den Morgen zu verkunden - Der, welcher wandert - Papagena! Papagena! Papagena! - Nur stille! Stille! Stille Stille!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48fbe584a5d3ea8a517534e17e58adc79ffa802fae92a0e69ee887fffacf73b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0945043 — a six-check JSON result.
Strauss, R: Der Rosenkavalier, Op. 59, Act II: "Hat einen starken Geruch wie Rosen" (Octavian, Sophie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4e32948cd29a13fc53a671e9f9c82b38ae9c572d8bf7126b2772802db47240. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1701690 — a six-check JSON result.
Der Rosenkavalier, Op. 59, Act III: Marie Theres'!...Hab'mir's gelobt (Sophie, Octavian, Marschallin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134e2a7e2bfb1c6d742868da2fc243d35e3ff13ac05ac2b1f218bd71ef18ecc0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0101370 — a six-check JSON result.