Mandrage was a Czech pop rock band from Plzeň, active between 2001 and 2020. The group consisted of Vít Starý (vocals, guitar) Matyáš Vorda (drums), Josef Bolan (vocals, guitar), Michal Faitl (bass),
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0e83470d5bbb7b42cba5088bcf5811e4e6f5540d95ce787e67c16f00e14a4b. 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/e5cd5275-15ee-4c6e-8d8c-75ff4639cd68.json and https://artists.proofprofile.net/proofs/artist/e5cd5275-15ee-4c6e-8d8c-75ff4639cd68.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2f061785df93a712d3972a2b47d12d2c122244e31ec3bf37bc9de1dfa5b7f2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CZUM70700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c219e9d22918ae40d81da5e87453a2b8857e4d1d4e2fa48f083b73225f20ffe. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CZUM70700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3c329c8af79aa0920b141ac427f3f588a3fc349efe3649227bf28d9a14aef1. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:01:34Z), 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/CZUM70700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cfca499328f0482e0f18017e06366319bd348b0d2d96bc927fa37f836df3b3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CZUM70700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966308bb42791a66b28066b446a6b4c775ebc9ac010fa29116b4cc42e2db2b5a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CZUM70900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edc86ed946018f5878d258f03f56ba7a6eb508c6edde545a07574f080f8c241. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:00:54Z), 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/CZUM70900500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d32ab3a5d352700d9848fc847b8ec97d017a9bb8864cc9bd18a2fbe9a05a10a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CZUM70900506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a0b88233c61e7ac13d6a7cbb317d7274c82fd179dccf0267152dd5233d23a0. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:16:51Z), 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/CZUM70900504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d28680f6abb5a18cbe3d0746aeb82b5c8f229a6e77671b29c3bb9bb86034c0. 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/CZUM71100402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a6c54c554a5e29c425b0ae4f2ab9ae2151df82b133c83bfc532b78364ac3c8. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CZUM71100409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8d0fc856170343bfc890227ab1056577100461181ea3aefe7c987ee4816228. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CZUM71100406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb961958591e3dc5c9d4ff9f793456bbda1b9db6abd00983dae9f8c7e7b7d338. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CZUM71300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b3a70d81a7c80bf164d5b88df387df050cb1dfed0394538ed405cb95fefeff. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CZUM71300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6da3d7dc9e8bba056e05a186bff9ec969b5172bd620b992c9d12fd722b7112b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CZUM71300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39914efdfa99f14b7e7235df68c4fa367b06e6c76ffb9336c86ffe315a3a457. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:23:46Z), 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/CZUM71300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca169b22ea693833dba25ba1fb1fd4f23b9d375b388abc1212a39cf0c67f471e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CZUM71300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c8812fde23f3848728ef49c2d2cc38acd1414fc53758c54df7b3e62a3805b6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CZUM71500382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6c55ba5ba9009611e6086e1e196d9bf6feb35d2a0d43a3d4e3fffa2bf00c65. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/CZUM71500384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918992e46677fecd9da6573a2f44d335cdf907d46c8f4be8793bc2f0f7749075. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CZUM71500387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25420baf7e1a50fd473b4e206a2651d82f460e9e6cd9c5980837194250cf719a. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:31:05Z), 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/CZUM71700381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d65b708c6096032faaac4c85d69e38e409d08fdc11db3679938cdbc6765ac21. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CZUM71700383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51a756c6e4ee08ad861fd6259f706a6b7fc9bb3ba871e962a7382da74c7b64d. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/CZUM71700384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1237b5cb799aad1fe9af849385898d7ce9e062c4f5211a318d72745ece2043d8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CZUM71700389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42017d28265d25959e251caa4ac578d9780f7044f5f8eb2c23df45cedeaaf461. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:28:42Z), 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/CZUM71700390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36d950d3ef1a2ff6e4c86fc2eb58f0be0ec1f207aab5aaafb49e44796f56349. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZUM71900377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf4619f7a6333ecd8232e059fe33db6a099f554c9bd28978a80aae292f1c7b3. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/CZUM71900520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143fed1166df677d3db35a5800e9f11e6f9d0cd530d55855d2b5804bbc5eafea. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/CZUM71900514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340b23b88a65b0c7a0ddf80e52cfc010f54de61b7dbd6c89bbd4414bc610b11f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CZUM71900518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f24afa2759c4355ff16f160d28ace505c69a6bd2fc1b5d7fc52d8eca6f02d3. Chain 2 (Bitcoin): anchored in block 959110 (2026-07-22T10:19:40Z), 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/CZUM71900522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958891e6eb7a3fc454447cde485a0895ef8df528e3603a9fb3b9d9e9b4d1d204. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:18:56Z), 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/CZUM71900516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc0ba427152ff58e8f06365b470cc06a70e08d9d9253618ae2d16e7ac2b789f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:41Z), 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/CZUM71900521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd440b91368439479047fedbd67279d6ec46d41b922fc27bfc1234381de981e. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:06:48Z), 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/CZUM71900519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c60b71df8c8964bcafb35a386159acdee1847ecafaa670496d4b4a7e96fc8d9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CZUM71700360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6608df91c3bc4db38d32e35dd0d9124ba9e158aa059ce7d9b11ec5be1089e5de. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/CZUM71100168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47307b02f4a6f0d0808d0e0910559ad7b23351b489a20cd54deacd436358641b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZUM71500385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf92229f545fdfae7f91218691540f3cb54ebcdc0715b1d16b7a6fd7dd84b4af. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/CZUM71500381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966308bb42791a66b28066b446a6b4c775ebc9ac010fa29116b4cc42e2db2b5a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CZUM70900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fef364862733ddcc5f25eb6a41c751569bcf8b6fb1557839ccb1e003397415. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/CZUM71400002.