Alexei Tsygankov (; born July 27, 1988), better known by his stage name UCast, is a Belarusian trance DJ and producer from Minsk. He also hosts his own monthly radio show, Injection at DI.fm. UCast ha
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 0x958367e817e862d9e9722073a73d515f18ac8b4e93ff5089751e93da27fecdb2. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43de89c9-ccb7-4d03-8b55-f9dc2a6a2bf4.json and https://artists.proofprofile.net/proofs/artist/43de89c9-ccb7-4d03-8b55-f9dc2a6a2bf4.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 0x63b1f7d91a26b579e1c5ed147682435da5e64e2c5ef42dd598475df60337e527. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US83Z2344356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc07e0e3f440c9239aa93af4d17261d147b485391aad9c69089ef00343292e6f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/US83Z2344355.
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 0x5dd5c8e2a97559b1f3505ea8137d9ef4abf8ad75bce4847df38265ff5791e408. 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/GB3W42300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3f05dea4c5c283c7b545205ff385b01612809cb92a83a3f5673249faadd259. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLD682001599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aafced775ed21987259455958a8120ebcc07eae8ede9ef2eeab56e276a1dc3c. 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/NLD681901492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84db6947d820330ddd2ea0d8e0b926f3d010134bd4fc6d3ed3a48d90867c0e43. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLE711800302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411358afbb5ae92400603557c758a838e845d1fda8a450e9d8801370811f0819. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLF711711083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd067413845e664108d61bb61f1a9bf6686c8b166f2b1a78f3c4c4fca53d8b0be. 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/NLD681702484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154fc98d714139987707f724f020bf746c568c177b22d8547c306db29c19bca6. 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/NLM1S1600456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3143d9212c301945c6df22609f094e263894d378fb3b632726ac3740c0e9f884. 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/NLE711600379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d827d06f55afdd9688bd955da186815d5a7be766945b0572fe931befda4dbf7. 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/NLC731500191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd3306ce6325aac2b80fba0ac0518060701ffe18b489d457927fbb34081c550. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLF711500181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb6d608d51233e92874c86deff1e6b80f569f9adf0c2cea514814be74d99c36. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NLF711500180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fd882b6e4722e5d7db6afd5eb8a63b7ed8f4cd521ef96409c0a7b04d56effa. 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/NLF711404719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98327ec171db96debc141ad2e6e4e464f7429ffab1ffdfbb9eebc0136585dd7. 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/NLF711404720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3f0666407f3ebc032dd087cf5441cba5aed26bf560f8b1b8e89195251a2c00. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU1440736.
Infrasonic Future Ibiza Closing Party Sampler
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eddf75f779811431217f1e1c73902af9c6a88e0ce1ba54482f662338e475d2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKQU1323995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde21a4be91f9d30216bf177b67d04e451c41bcac67b164a083a615e8ab936ee3. 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/NLF711502238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffafc4b64d2ad3b28ac3d3ce9066f562aeee1cdcfca5daef5ad226397f9226a. 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/NLD681900991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70aaf85b777a61c797447acd38d2f006140205089bdfffb9ff130640bfe2e52c. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/NLF711703491.