Trinity Baroque is an English group of musicians who focus on the Renaissance and Baroque periods. Founded at Trinity College, Cambridge, they are formed of a pool of 6-8 singers, sometimes expanding
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 0x5f104fcdafb8a09294a3063ca041ef52fb6f4e27a3c926314d3a1182493d00c1. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b845a779-1713-49e1-81e6-5bc3d0a564b1.json and https://artists.proofprofile.net/proofs/artist/b845a779-1713-49e1-81e6-5bc3d0a564b1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
J. S. Bach - Motetten (Meines Herzens Weide)
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 0x9e345fb4a644cc2e1325104d52f2044c14627818df84383312e5d06daba0baa2. 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/GBC7N1040201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d51ec43ef3b1d6019e5ae2112478d824e55d1af5f38865fcc8cd37fea789eab. 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/GBC7N1040202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d4598eb7d7cf448e4cc82059378b01c16fd69dd85c811624e9334ae3a24da2. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBC7N1040203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb667a4d9f6d11d0dcd394689fe82c92f8ed0ff14caf1f619f3927fd41cbf0bf3. 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/GBC7N1040204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc28075090bdaa2d2ebf1afb288787c5912b0be37b1c5f45d2633f748f89a6a6. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/GBC7N1040205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2202554950357da4a721c35f8dc01d50abd897dd5b532b02ccb2b525e956f18. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GBC7N1040206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf0cabccc47f67a87216222fca97870495b7420eacfe3f1897b3f2e66a07158. 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/GBC7N1040207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780d5618cd361b17b2d8b360c48e4dd985157e7ad84cdb76b47ec9655a268b9b. 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/GBC7N1040208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5c52877548fc7b7a81b8a329f22d40beebb0bccdb91b39552197e65bea61c8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBC7N1040209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34824d12238d147eda525dab0cf06b695625000b4b5d6464d41e5a91e28da0f4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBC7N1040210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4f9a8f52cfbd5c952ff096c7b82c2d0700b7d58a95836f733e3d927d18e2c5. 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/GBC7N1040211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a10fdcf4e7ac33e83f1ca5fb294e0e338684a2b30d86b2b28b42105276bd40. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBC7N1040212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837a2b16513a55913dc3925456d0e5c53d2a7d0fcf924cb9062538bc497243d4. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBC7N1040213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc344634f4d7d462878f32cf7472ae817c22ab9bd4c097ebd656249fce5197a7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBC7N1040214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc026ae58c3c3fa4e6b40924aa44a0347ecda45aab52c3a853858506675d6eca. 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/GBC7N1040215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33586d2793019c45aeb05f37da19d80db298ae18c1221235b297417f2905daab. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBC7N1040216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09db2fb18f34dd2a2f2898a141445707326252d3fb9acc450c3674026e6593da. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBC7N1040217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aff02e4c71d0222e10933cba6b3c8768ffd33b89736e868303f6e7921fd77c2. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBC7N1040218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa799cbc88b87c960b3f4d1a703e76afe79c6ae99500dde001608bc396ceabc9d. 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/GBC7N1040219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6383f2fb11483a9b58201a663c5f7fba98995b6f4f2b882fbbe0b8493dae0895. 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/GBC7N1040220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edf41f233623ee7a836ccf344c2d506ffc324b00cd1d4da9a404ccf1b89c5dc. 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/GBC7N1040221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a182fb2518b1af7a7d7c92ae7d84a98de1357fb7b629b1f32679f50b50b92b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBC7N1040222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c44f79afa759c3473f1978fc57dd1745fdaf290fdbbb6401006bf6f45bcfda5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBC7N1040223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee20cff8f090833c3d2fad00cfc561a820edebd6d54237a4c0d42226d369d91b. 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/GBC7N1040224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa89a794d86a161eb3bbdde14ec716ef5e5ccecef4915f5f064fd9b47b5b6e17. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GBC7N1040225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d1aad349d5b65682f032f6b5e2e90ecb0ca67b00b28b504c209b55211dbff8. 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/GBC7N1040226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6794f401afd7089f08a7f2ba5f44a1708dd9a2efbabe3ae34e2bdb9dea82b885. 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/GBC7N1040227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942722f8e890b81c34cbcf4883561939a773a81e4990689d12bfdbff156ea0bf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBC7N1040228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8fe001afaeca44de7e112835ce0527c9a2fe0ee0340450782c39acc88916d3. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBC7N1040101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322aded148a0d68e7eb755a52f7c0fc33668aeae1d7c19957e2b77bb9e75ceff. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBC7N1040102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7770d6eb063247e3aed662e753e41c52b7fdba7e1e9303c0c1379658423ef018. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBC7N1040103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ceb31bc52defa6a248d032c1e49415417eea1bcc35c90c2f678001e49fbfb38. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBC7N1040104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a375512fb69ce0a96166934cdc91be97fc602df2565923a468675e40229d0e5. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/GBC7N1040106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6c4d2b06395c9535e8360a67aa5956f98fd08098a2762800d410f6ff256177. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBC7N1040107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea47fc93f23cb8443f445942413f0a039c14dcab55b998d77e58d99595be2ad. 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/GBC7N1040109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50224fed57cb61a4fc8e8b331396a62e304ce05070bed2694556d89e21572ed3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBC7N1040113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3a547e3389885f4ed1bcd9363131d471387ae06ff0b9c5dbd241d74b1175e3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBC7N1040116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6427e566e2222285878e99151c02b3d4a09ebcfe7f67d09c3f7722a1137c66. 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/GBC7N1040117.