Wanda i Banda (stylized as Wanda & Banda, previously known as Banda i Wanda) are a Polish rock musical group. At the peak of their popularity in the mid-1980s, they scored hits like "Hi-Fi", "Nie będę
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 0x6a90dede0d3b2d003e6520d819c69742f87a4048b6a810399c78264b5551a243. 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/3fb618d0-58bf-4110-8a1f-33a801bd1683.json and https://artists.proofprofile.net/proofs/artist/3fb618d0-58bf-4110-8a1f-33a801bd1683.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 0x4e446122260608430cd15cf41c3241f9dfad545af971566219508b0ac2448820. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:10:50Z), 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/PLA888500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509c8773ef4cc60cd70e0c59c3074141727fd49ec8b8bef8345556d00cf3c3cc. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/PLA888400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7947f8a48ea77cb55d8e07b5e48dbcfffe5c20e2bc1e3f76fa2faebbc7ece21. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PLA888500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084a808f1d3f19193a4ed453c2e8b7bb4be1a390ab6bc841ec9a0be94396c344. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:59:30Z), 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/PLA888300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fae3e435cf9c23d8b132347047236ef24b6ccf3d2d8c8b5232fdfbcdf9003e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLA888400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d7d014d88a0f973b6deea265c2cc1484b2665b2643808d8fda59e71d2ae934. 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/PLA888400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f492133a5f4b25847e8374cbf2520ed5d19441a13fe7f6a15981ad4a03d331. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:56:42Z), 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/PLA880800403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610bb8a133fd248761c36d7dd8e61c0e78508a2346cb6849a4710cc363820535. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:35:14Z), 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/PLA888400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ecef643daf20d9f0d31687652bd559f45ba24be7086958fa85bd2d4289b35f. 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/PLA880900331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1d599edc82d7d2191985e50a0942026d00365c95a738230cd9fbbbca1bd7ee. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PLA880900330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce38d81c7f92afd7eb472c9df9e02ba5a52d129af4c1b28a17775b5af70f4e08. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/PLA880900332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a62836c055e8e7ed3fd9cbaf7cbad9d3ba9664e73cbd9e6bdbbb475a9470f8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PLA880900333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7036a60009e19d6a92c1c281a9926d849e310ecce91204bb8431995017a63ec. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PLA880900335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518cbe8c0e469c3ab89feb5029974cac809ce1c6baf95209a6fe393dda91e740. 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/PLA880900336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87d831696ef9d3d71ab524aa4d7fe2e8d2a81168ef0de4a9284b2b303c16318. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLA880900338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86fca97e57da85cb236c55eaacb0278fb1bd0539864b0434ca639fc1a4938f0. 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/PLR862500373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3adabe819f978a9159df04fe1b104bfa6ad7cb66e897113b473a6740ec5fd16. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/PLR862500374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe20b89fb2f051032345d6fda82e1e825881db49759bb53accda29f0a305d34. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:41:18Z), 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/PLR862500375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f46208b4888aaf50df29409fc992f45a713bacc241657e9bcc4303d3be75f3b. 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/PLR862500376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b258f3b41a32875a8d0bcd61374f2df8c441daea4dfab6bdd7fa275f526eeb. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/PLR862500377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bac288372f69d00595dcc0304c4d5e69e5652db18966e9344ee123b0870ae99. 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/PLR862500378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a73d3c297e4d406dedc7f177b6d82bd8136b98e318db8326957f3130d507a1e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:46:08Z), 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/PLR862500379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394460929531f39d14efed214a4b9681b8bc143477fa5dac4e0e43dfefe04b7f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:38:57Z), 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/PLR862500380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebe9c96a27a8d2d2534ef730f6c50b639cf12042fc893389c2b6daf9bf6dfc5. 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/PLR862500381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c03da8f44caf395a3c6468c51f401dd5fc07db553b3e911d36f4fd02da239a. 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/PLR862500382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2ddbff863b770559199f3f3dc4a35f13fd247c9bdca069d44a7548581ef02b. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/PLR862500383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efb469b1f351dbd5dc62f367ece0f4a10922adc99e18b85844b89873fc042de. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/PLR862500384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5a06448166952a2f1639b7b833ce32f944d897d57f34d8737ef0b2fb5e8a9d. 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/PLR862500385.