The Vienna Boys' Choir () is a choir of boy sopranos and altos based in Vienna, Austria. It is one of the best known boys' choirs in the world. The boys are selected mainly from Austria, but also from
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 0x92d28470a2f4b42e67f0dbddca2384e7a9483e3b35cc68124cceaa9d2d24ddee. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d3a8810-d24a-4785-8e76-08ccc80df1e7.json and https://artists.proofprofile.net/proofs/artist/9d3a8810-d24a-4785-8e76-08ccc80df1e7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xabea16c64b46800c0298380e996c01fa7a664873174d0c2150fd320f2404e7fc. 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/USB8U1035283.
Mahler: Symphony No. 8 "Symphony of a Thousand"
Symphony No. 8 in E-Flat Major "Symphony of a Thousand", Pt. 2: XV. Blicket auf zum Retterblick
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864cb53f190413a24b3e6f11fa1b604c71a79e2a349f8142f8508fc7bc5d51e1. 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/GBF077130615.
Symphony No. 8 in E-Flat Major "Symphony of a Thousand", Pt. 2: XVI. Alles Vergängliche
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa791bf233c3bd287e4af9176c1a5030b0c90672020ae1309dda8ff76d6afb10f. 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/GBF077130616.
Choral Music (Sacred) - Handel, G.F. / Mozart, W.A. / Schubert, F. / Haydn, F.J. / Herbeck, J.R. / Bach, J.S. / Bruckner, A.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32caf00fffec16e9def728ecb1afe5795b35c1f97f1eef472801997bb29f602f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US2TL0923402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f68821f46ff5af804c5b2855c7ebdb7e61578d0e1881a5cf123d40d6d292cd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/US2TL0923410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85edcd21efea7e46f0f48984cebeaf140b26b1868a59d7014c675de589a78fee. 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/DEB260200463.
Stille Nacht - Weihnachten mit den Wiener Sängerknaben
Dreaming of Home and Mother - Ryoshu - Song Bie - Li Ge
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0fa8748af90b14e0a7b6d895eb0d32539a10cc6d42d879e559e569a4f106d4. 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/ATUM72100170.
Frühlingsstimmen, Op. 410 (Arr. Gerald Wirth)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae1249fbc3aa0bfed304d0833dccd0317cf87fa0b43224c63edf0ceafb00115. 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/ATUM71800119.
Tritsch-Tratsch-Polka, Op. 214 (Arr. Gerald Wirth)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb803638451ad133eddeb89766b001989ffe0836e9a58fb47aa2453553701c0e4. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/ATUM71800125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85184d5d3e3bf4f073c74b1c0bebef976ef896336ecf3d27a45fa015acdfdd0b. 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/DEA311800696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f95a6a74b5d77b61c43a12d109ed512e4ebc6f6fff086d03c3e501e2f6076a1. 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/DEA311800719.
Magic Christmas Carols (Original Recordings)
Mozart: Requiem & Ave verum corpus - Bruckner: Motets
Requiem in D Minor, K. 626: IIIa. Sequenz. Dies irae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cdee07c1fbaa35050cf77a0e83fc5ff223f265e892b481efa5b4b313deada1. 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/DEB261600992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15e4eff2580abd6419719736304fe2fe41f0f39fef1f4cac86261898792054d. 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/DEB261601004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a8de2d84137dd76e86d6781112540984965c27639f149cd0c71d38ebe66581. 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/ATUM71500275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b3f72d59379cc389624532f24b4860d1ce734eb7c93187c0bc10567c0f0cb2. 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/AUAB01250435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e40721ff93abc0d99ba6fd1e073a6ad59fe4371cef2c99ca9a7a2aa5bc32a1c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPTO08971160.
O du fröhliche - O du selige / Weihnachten in Wien
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772a84fd1af0fa328504c0ea786e5f36319916df7452ab6ca2cb1d384b245d8c. 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/USKO10407674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993b528d102930709bebbf8ca1f71a314ff642b4e74ae31bdd3124784c32dbbf. 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/USKO10407677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12194f3798ef3f8f138982278968c4ff7d15baf6b8d330f2ddc9e28e8bcb7466. 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/USKO10503387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc893bf34c17c79dab7a9e5470ee414921a7a4e7a855ccd6c16b26ae18a510d0c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:37:45Z), 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/DEUM70604981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606b4673351fc3b578cd9f0267552ea37b3ff0095c55d76606b81a69acbdc6b3. 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/DEUM70604989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3135b5d9fe8a6be369e434b3b2f797d54a637a780d32e3954e6c87c056232c2. 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/DEUM70604990.
Vienna Boys Choir: A Jewish Celebration in Song
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b62e5d164a4060afa3fecdc663b41a1b3acf8807d41b33d9d7fd9778648694b. 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/US2TL0914819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c1c930f978dda804148c9103dc248a8177f969e7e2c9d8827a5f2bb346c82a. 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/US2TL0914825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d525b42d519d4126e50a0d524e4a13139f2f2aa704ddcfd461c540e9fa2c134. 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/NLA508809408.
Die Schopfung (The Creation), Hob.XXI:2: Part II: Vollendet ist das grosse Werk (Acheived is the glorious work) (Chorus)
Haydn, F.J.: Schopfung (Die) (The Creation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15dd4db2c6090824fe4892896808ab213a4ea56e8494ff0d143f22d325986e0. 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/US2TL0941026.