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 0xde44fa31d03b2aa51ef7f6aff3f2c1e84b34a0c21837d4982862a6ff76756bfd. 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/dd2b1199-b13b-454a-9e2d-3ef2bd830ed3.json and https://artists.proofprofile.net/proofs/artist/dd2b1199-b13b-454a-9e2d-3ef2bd830ed3.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 0x1eeb79bdb4ee7b086f99d62575024c8998dc3849decaf9bebcbbd0cf0e438f4a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ATH921100801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a2b31bbc743378d2ccb189f97bba301b3b7ac38299aeb071ce96de856ad873. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ATH921100802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b38f0550665966d4781ee4d06574b8e2dbb3282d4da4644b4bfbe8c7a93ecfe. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ATH921100805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe30013b8d3b76f6d1b656cc8e4d8f76f1a31f8b67e0c6ce197389b068e5bbc. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ATH921100806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c24d0868760f8daaeb3c7c0745d5f3572938c78879e8cb01a082cc55e8edabb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ATH921100810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb199439e5714444594e1a52f5b44bbcee5eb3dcd1a596df687cbf76b4b619c5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ATH921100901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565f1cf7ce8ccf43a6b15a20b5bb20a7e27763e45e1698c1043a25179bf5beea. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ATH921100902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e708a541646dc56ac13939409778e9c099e194a14a21045e14650df944914c0. 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/ATH921100904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504f29427922394c7682d40785ff678e21174da4ad224939db53306e7e5e3a12. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/ATH921100905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d95f213bc63a8a9bc8a374697a689eb29ea2bbeead30870b404ec0e558f64d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ATH921100911.
Impressions of Petra, the Ancient City of Jordan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dc25fab4a04cf8d5780b0c9339186a6f0d711dd9925df57cbe0c4388bdbc4f. 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/NLB5R1500071.
Impressions of Petra, The Ancient City of Jordan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69faf396baa418d969fec7953321168af3904a39eb5db6bbaa4f3fa99eeaf61. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLB5R1500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cf43e6ab3e0e04044e207e5628188a2d8a162e468dabfce8bf0bd30eb6c656. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/ATT252005940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15dc1a18f32f4be3bf241d2fb534fd4915f99fbacddff5605b4fc107d1b1076. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATT252005970.
Von guten Mächten wunderbar geborgen - Feierliche geistliche Kirchenmusik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa271214654945770857f59186277e8906cb011171a09fcd544688a304bd85ac9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ATT252204580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa305e7a3620674492f78686164af167f526f355fcc649e57d0992aa40c102f8c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ATEW52301404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf85af547c716d310b9880a9f0f819b36730f13177d42b78b143ae0b554307c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ATEW52301405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6e88d9f64c32bfdc4bf86440844620f60556daf06aabbb3023ec90bf9afa86. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ATEW52301406.
Blasmusik verbindet - Blasorchester Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40db1ce25e51c18a7ba79244f8e58065b1e7db6a50dde2fca2e7ff884b1927b4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ATEW52301407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25116b3a81b9f54b441280aaabf3d9a8b71be7141605f8561023236dc41cb1b9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ATEW52301413.
Im gleichen Schritt und Tritt - Neue Konzertmärsche aus Österreich
Durch den Sauwald - Blasorchester Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d5873e8fb23ef8bdb80320c16b525c1d6295ad2cf01bb84ef304e64a244d2d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATEW52402501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f55e1b8bef2e292307e13ec8cbceb62fe9915e6a8e8cf535bf614edd72ad7e4. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ATEW52402502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4a8e78a098030e741950b88f5e57204b1cb72b9ff6cd8c55c4d8fce2bdaadf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ATEW52402503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05f74a2513fa5ba64e500e4b202210c38ca9b0e451165c7fcecd89cbfc308bf. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/ATEW52402506.
Salletmayr Polka - Blasorchester Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7249cf8262ec22e16970b3796178c2c62b4c0e3ce248c20dea2cc87d798026. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ATEW52402508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe541bcf0aa900f36e170abb23fdec24f01476a4a866aa5101fcae19a00668b1a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ATEW52402511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52572eeef5674aaca07ff21c10f13d0aecc23cdd5018a24236a962bbc615330e. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATEW52402512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ebdc2a4ebddebab850752d74e945df3ceaa40dd2f0331525d74f0e424e0274. 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/NLB5R1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb489fd139f247dc8e6f94fd7689cdf30ca7818f4fda48474ffc4494067684433. 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/NLB5R1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2282f7651c1ddf7160e6e7afa5be62880c825625d7d5f63a7f495fe159ed17f3. 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/NLB5R1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58ff15c68c02b74ba39ddf7dfd6578add46c9b40c285bd7902aba5c08c793a4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ82035177.