Moskwa (the Polish word for Moscow) is a Polish punk-rock band, created in 1983 by Paweł "Guma" Gumola (guitar, vocal), Piotr "Rogoza" Rogoziński (bass guitar, vocal) and Tomek "Pałker" Gron (drums)
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 0xa93306638b36daa7d9071e8ce0907c9cb49ac5270142a6af5e5b6d37b35edeb6. 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/6ed3e941-fa08-4fa3-8a41-dddc1f8c6af2.json and https://artists.proofprofile.net/proofs/artist/6ed3e941-fa08-4fa3-8a41-dddc1f8c6af2.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 0x49cf6210757687812f78c57d697c028f4f0bd26d3532f92f169975abebd0fa32. 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/PLB178700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb554460ae6f2cff661fc5de63d01fda3dd919fc791b72b11e8daa593c836a909. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/PLB178700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217f3dc6c2579148c10fbdbaf57d8f31982e6e03718f8a9a0388347b9d90dc43. 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/PLB178700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253ea20949ef2e99a3f476c56bcdcbee709d89d47c9304253c701da89c0a108c. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/PLB178700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac16042b1d051432c07772a49fcac9eb262f2c62cf1628b6328ba07e70316c9. 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/PLB178700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df00d9c0623ec272c989755fd85424f9dca5ef991e857872dbab31204e560b8. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/PLV071900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c68c2332b50a2d76d1b7b25cf650aa544f3a16eaf9a6f181cbb5f47af654aa7. 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/PLV071900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47958bb0abdb95f72affb2736e550ad1885d9e009b298c9ae5dfaeea10bd43fa. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/PLV071900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3af32c6e4fa13333a15634fd7ba8988b9647e55d3dddc0c36e83295e238f428. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/PLV071900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689080fcf69bc8166cd1815fd313f97684057e37955eb1e3801d3c2efc2119f0. 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/PLV071900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a14d0f54c6b8b34c2b9dbcd7028dee80880d8eb3a0dde3318d1d07baa32aea. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/PLV071900014.