Milan Lasica (; 3 February 1940 – 18 July 2021) was a popular Slovak comedian, actor, singer, writer, lyricist and satirist. Active from 1961 to his death, he was known from his double act with Júliu
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 0xec73e5ff015a2fa556b6da6f099d985b39a8e4228506cf6bdb23413d69ccfef6. 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/3f95a271-f027-4c12-905e-1a6f094ea2e9.json and https://artists.proofprofile.net/proofs/artist/3f95a271-f027-4c12-905e-1a6f094ea2e9.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 0xf90cb6f3b504d59f3519a987c1bfcbfdcbf4000ee9b184ebb4cea9d5353ef1e4. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:42:29Z), 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/SKA129947501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc832ba4ac642e5c0e953f27636e4f3cf0ba40ec2afea6fda36ba54c24584ec8f. 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/SKA128118002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae29daf56c4b3a8c1e69d90eddff9d73d1887ede13a2dd2b6a0a922bdb4e855. 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/SKA128118003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa47d4f8ee65767289be555273e570b041390302a2e5418688a0fbea22184f96. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/SKA128118004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f3a1a4b46155433d08f0fb80ed6a6d4598b9616a08c1df91b73680ec12ebb8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SKA128118006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22adab9750f25a521941b206b2d29b86f02efa9ac007e87897d4829eb2c82d6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SKA128118009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9ec47cb59badeed571f3a1e75d433f10250f1a8842495ff048db3dff10e18b. 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/SKA128118010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c078a3051a4840aef94dd5214b2c5f5208f094040e7fe1811857951e8037959. 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/SKA128236602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8cdffa8bf2c00b3812523a734b313018ba15f902f5124cb66c6dd0eca22b65. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/SKA128236603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf977ed191621116b6ea345ca0ac472aa9742cc5e8ae5819de3aae2863882e179. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/SKA128236613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c73b1b610f6e1a338845e1f2bcd4fcf3df3ce05c3910799b5f69005c3c891f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/SKA128236614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cce904a6ecda269787ca8878b412467ca09b1c5d882adde7cf185e9014ac7e. 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/SKA128779813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd947153c8bc767817f4f8adbfd02da0756cbc09fb2908cce1a53d28fe2c1a4. 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/SKA129020806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25eb61b5e3a9b1846b7bfe9266f70c54c499c3591b073217a9b74bd5335314a. 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/SKA129020808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd480ab8eb477c6667a0a5757f6c7ea70be03ef89d006d92d4385e0d3d7c13249. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SKA129020814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c7fec72d6d6d52d6a13aa547508ed56b97e8fde38322b6890778108a9498ff. 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/SKA880100303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ec14c4cc835b8be8fecf0eda7877d0432b4f2130eb87783ab64163026c17fd. 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/SKA880100309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96f3c6a076cc72afcb2b76fa9ee34231ccf2fb05cbdd87b0a168010ae238bbe. 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/SKA880200412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234d93dfeaa23df66ed263f67e261fee84a47642744bae8431816a29bb1bb288. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZA110201031.