Marysia Starosta (born 19 March 1981 in Warsaw), is a Polish singer. Her debut album titled Maryland was released on November 24, 2008 by EMI Music Poland. From 2011 she worked with her former partner
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 0x488ecdc0a479076208363c6980fbeb778591b0e477d23b6ca81ab569c6ffcf5b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8535c67b-fc78-4fdd-9cd4-5738f43693d5.json and https://artists.proofprofile.net/proofs/artist/8535c67b-fc78-4fdd-9cd4-5738f43693d5.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 0xb8d7a686082488a13079df07e1ba05a937f799bf17b04fe99e24cc77140d45d9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLC071105001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ce5285794fa096a9ae7bcb5fe31012d79f38d22e46e2f35272c15cbbc47715. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC071105002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69f4237ae7b558156fbc0bfce757966d7cf6fc8ec789c675a7e0c6cc81beef1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC071105003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75ae0c9b28b7855a1e604bf53270075e16bf80de691055be69f2162cf5abe73. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLC071105004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e694c9cdb27ac3378be7d51bafc26bd02ead6d13d499d2ee410253419123f87. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLC071105005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68042dd3a6242b600e9d167c6a07b3bc3c64cbdfc760b48071d62985bb1c19b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC071105006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9b06969a9fcc215218a104daab9fb7edd055f957b1ddbdb0b65a85d714f249. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLC071105007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0afcf06de0426778a760b98a4ecbbec9014b89961282582b5820b586a3f891. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLC071105008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7797135369ffcb63ecb32d1a75e94b1548b510b5bb55ec60ce27cf0d15fb23c7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLC071105009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343a35807aed562a800f920002241582320f13bc8fdfb1e3c90e14b59c8d21fe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC071105010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe223933c038e98f03be58cedee507e90081bec4174292d02b64b2df492556af9. 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/PLC071105011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe45f9b6a23ce02cb40f106404e079a4b1a872ff415d0d2d90980b0938c00d75. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLC071105012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d78b311526a88744813a08d5857bf373999700cb7ddc4f315a31993dc9af087. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLC071105013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc29daffd900b8270d2f2bf93859aa112f3cc3cf4604c823dacc0f58ba4e10ca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC071105014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bca3a939b0596c4140ae165d3a4001ea0a85684ab614606474460dc3507d3f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC071105015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1dcf3718d36cf66d8edc32d2d4044723e6df023f6edb20600483cec9d1cb5d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLC071105016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7152ffb9886ddae20786a6463c3f2b830a082d247f7ceefaa35a25c0c651da9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC071105017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bfaae62bb193cb9ca397be9698b071c157e902f845fac5efbe053910420217. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLC071105018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81169380d0f5e1d5b9da7c9bc509fb4b6d3e6ae05c4484c8791bd81dad902798. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLC071105019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa02724922b785b7d63c859d0794926a70699371240db6ac219fc1acc23089c6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLUM72200473.