Marjan Mozetich (born 1948) is a Canadian composer who has written music for theatre, film and dance, as well as symphonic works, chamber music, and solo pieces. He has written compulsory competition
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 0x40a67d6e5446b36d999a10f2d0af8e0d51ef63f7df29abbb53aa1c6956cfc823. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f2bf214-0b74-47c2-a570-6b4eda2a1ded.json and https://artists.proofprofile.net/proofs/artist/2f2bf214-0b74-47c2-a570-6b4eda2a1ded.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozetich: Affairs of the Heart - the Music of Marjan Mozetich
Violin Concerto "Affairs of the Heart": Affairs of the Heart - Concerto for Violin and String Orchestra
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 0xb6a7ddd359df60719d833d62bf77f64389a243dac60ee2653cdab5c1aa73c5ff. 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/CACA30411011.
Postcards from the Sky: I. Unfolding Sky
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e321c5de309cfb3b22216c6927f6b6ca5a4b295adf2315f1678e4cfff41139. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CACA30411012.
Postcards from the Sky: II. Weeping Clouds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdea92802183697f17f0501dcf78ad95451a8e5a6f9559ab989c7ee10cded97. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CACA30411013.
Postcards from the Sky: III. A Messenger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273c32694e294273c1234ec9bc1347d71ef78b9c989705159952212431f1b57b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/CACA30411014.
The Passion of Angels - Concerto for 2 Harps and Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ab3ce9d8b82804aa8ce0036bd4f913d6540eafef82b546352544fc728fbef4. 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/CACA30411015.
Violin Concerto, "Affairs of the Heart": Affairs of the Heart - Concerto for Violin and String Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a7ddd359df60719d833d62bf77f64389a243dac60ee2653cdab5c1aa73c5ff. 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/CACA30411011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e321c5de309cfb3b22216c6927f6b6ca5a4b295adf2315f1678e4cfff41139. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/CACA30411012.
Mozetich, M.: Lament in the Trampled Garden
Angels in Flight: I. Arrival and Dialogue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5969208761d409891c05ccd4c087df53397c9541b81968c1b4958d310b9fa6fc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USB8U1040292.
Angels in Flight: II. Song to the Eternal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a0db7c2ac23ab7431e4850986cd2e8141b099d4b0d7bd4b72992fe469a1f68. 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/USB8U1040293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206857f9b57d861c4ea7b5a1937d628c5ade9be00688809e84fe65f3a1326539. 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/USB8U1040294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748221d2ec9087fe50e53c7523138e6af98b88775e086e8a90afd22f4175c4d0. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/USB8U1040295.
Scales of Joy and Sorrow: I. Slow and expressive
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5e66892862d0e55563ec3789d0c6e836efdcdd2ff6da52d735c96ff27168e8. 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/USB8U1040297.
Scales of Joy and Sorrow: III. Slow and expressive
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b857755a1c6ab21916224421e6f5810ac06b895f867bd0496cd19b8669bed91. 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/USB8U1040299.
Marjan Mozetich: The Complete Piano Music
Marjan Mozetich : Fantasia ... sul linguaggio perduto for String Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8df7a9784bcd9e92329ca00a8b1a9998e48b58386c5796360b6588bbb00997. 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/ES5150700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07d628cbecc9550c77d6ff1c4faab20af5b82e822b487d40eb7da45cdb40818. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CALC41501651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9b43869e5b6bad991b34bc42adaddba3b65d42d525bf06ecaf5ac08216a943. 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/CALC41302124.