The Sixteen (previously known as the Symphony of Harmony and Invention) are a British choir and period instrument orchestra. Founded by Harry Christophers, they started as an unnamed group of sixteen
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 0x9e0cc2c76c4c8c700199a5ea043a3cc95089e7807dff16c07f045aea3a3bfb51. 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/063e6065-7461-4cc9-b88d-58fb123511a4.json and https://artists.proofprofile.net/proofs/artist/063e6065-7461-4cc9-b88d-58fb123511a4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Royal Welcome Songs for King Charles II Volume IV
Royal Welcome Songs for King Charles II Volume III
Royal Welcome Songs for King Charles II Volume II
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 0x74c342e50f6254b60460277b00db57869ea30eae47275e4e42c5fef0ce41454a. 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/GBEJP1714901.
Quatre Motets pour un temps de pénitence, FP 97: I. Timor et tremor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5e74f7927771d00f88373788a6f1cc2b4d73ce436b6a109c5b8c97ca0e7142. 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/GBEJP1714902.
Quatre Motets pour un temps de pénitence, FP 97: II. Vinea mea electa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef12449049f531d606a806d08b87ff4758b43da50aed8cfdf1face3c68e9715. 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/GBEJP1714903.
Quatre Motets pour un temps de pénitence, FP 97: III. Tenebræ factæ sunt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f434c94438286f92aa230b54d9dbd4b597d24b9d392b5d4d902619d44a2d28. 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/GBEJP1714904.
Missa Ut re mi fa sol la (Hexachord Mass): I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c6940c7c2e6158b821e4ebfa72e2c8d734dfbe0e0834daf3a0ab18ec1d730c. 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/GBEJP2319701.
Missa Ut re mi fa sol la (Hexachord Mass): II. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3da9bc1576140bc62cc13d46ae604d000c80965fcb2e126c2e0d152d07e9d2. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBEJP2319792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fb18f0af7287394ab9105822133641591bcfcda2754abc532a27b5397d0261. 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/GBEJP2319503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80346afcefb5e45835ad8425d9363360b092a0bc8d7dca3772a0faa22a22badf. 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/GBEJP2319506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77d193f812e0d14d0090087940d5fe1e565a9031f330c041345f3afd7ed97bf. 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/GBEJP2219104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39199f37398c23bfe11bbf7a0386e5d0c9870f031af055db2fbfcbfa86067f34. 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/GBEJP2118814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f1e4f6c06a24b02a94d9972e98e28b4e58df859f1849bbdfe8a114e26b8656. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBEJP2118409.
James MacMillan: Symphony No. 5 "Le grand Inconnu" & The Sun Danced
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153d3e6ae2966ab8d846896c5e7fb50b6cb27902e1274754ee2e72313a58b3d1. 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/GBEJP1917213.
Star of Heaven - The Eton Choirbook Legacy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66b8c2b374919c236164148a7b55d716fe426bc7d587b09f4b6f8f351cc8ec3. 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/GBEJP1816705.
Monteverdi: Messa a quattro voci et salmi of 1650 Volume II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fc295b7534937118883b22e42319209ea95971c2173c912ac6655ee7324d66. 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/GBEJP1816011.
Vivaldi: Gloria in D Major, RV 589 / J.S Bach Mass in G Major, BWV 236
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bb16614a52960f61b23fc8852b294f8399f9eacf9a4381ee1d29ab1d9707a4. 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/GBEJP1715501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27e6407e7a40761d447ed8c20ace86e474e4b2c0a568569bfacaee7e10da796. 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/GBEJP1715502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21c4d4c3deb017e0a158a250a6ab5f910494af5cffc83e56b096158e0fcea9c. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:02:56Z), 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/GBEJP1715512.
The Selva morale e spirituale Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c7b0c6ffb53f34505055a6f317093415132ba670f3696321a33ff402433057. 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/GBEJP1614622.
Helper and Protector: Italian Maestri in Poland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b2fc2751a6e630e3f51ba1f02fccce6cc0a9215882f9b2b5aac6dd4c1fabfc. 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/GBEJP1614101.
Monteverdi: Messa a quattro voci et salmi of 1650 Volume I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6d0e280a0a35d7d095c4669a0a50b8a7e8d5b774926031e1fee096bc9d3120. 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/GBEJP1614003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e86165c0947cbab8ced70407163d25071a69a9d113dd99c285eecff984a82c. 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/GBEJP1614004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e01db0a3487585b8a5e8a9ab749fd8f4e8cab4404285a6343f83c1e524b05d5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:10:20Z), 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/GBEJP1614005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23239fbedaac17dd457cc419ba7af8d0f413fc715915fb87d7fb3c3f310f2246. 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/GBEJP1614006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c632dedd7b0840bea6e40844a51f451fd7648e4f1b2d2f8295933d0bc4c06b1. 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/GBEJP1614011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2605396ff88faa07cd73dd115b0a0599e1982a36bd96622899c6b8331c0bed42. 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/GBEJP1513404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c60e1c165af79b16d58a494f58d208d2d327498eafdba780649451495f70d7. 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/GBEJP1513411.
Stanford: Partsongs, Pastorals and Folksongs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08787faad68c2e06b38f848f39947c3ad9d811cfc340b8b5c4edf5b883585165. 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/GBEJP2521001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec02d94ba40a869f5529e89e5d31b125ac2a6e7e30a73db967317d5e9cca134. 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/GBEJP2521002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ada98ac258170a1df1f2cf7ec26518915fa1436c7311f2ec811a22fdd0dc32d. 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/GBEJP2421003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8b7b2ab9ba8be3cf249017bfc89ef8407a3ff8cb680095826cc7e5f23bd19f. 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/GBEJP2521004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70872010818e7f41a596f6dde16f1613b3e7f02776e28834c837ad31ee464703. 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/GBEJP2521005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf457d90e7ee846dfc4859528974095fcfc48f72f14105a36c0aba85773f71fb5. 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/GBEJP2521007.
From Silent Shades and the Elysian Groves, Z.370
So You Think You Don't Like Classical Music? Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc041a73cf2e9ba9b005b6677cd6f0253b3cd1488c9032211c00b0dc7eb9200c4. 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/GBEJP0315003.