Alexander Grigori Arutiunian (23 September 192028 March 2012), was a Soviet and Armenian composer and pianist, widely known for his 1950 Trumpet Concerto. A professor at Yerevan State Conservatory, he
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 0x54860b7cefd028a685b9e97b1cab8fb9af46cea95525724bb80bccb59c09766c. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ad1baee-d46b-4551-836e-57a2c1c4e7a2.json and https://artists.proofprofile.net/proofs/artist/6ad1baee-d46b-4551-836e-57a2c1c4e7a2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Arutiunian: Violin Concerto, Sinfonietta & Concertino for Piano
Arutiunian: Violin Concerto / Concertino for Piano / Sinfonietta
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 0x56f1ae564ef89b0544d809d440001ad72dff88a0a1c945592f079c67c832fa57. 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/NOEHX2220090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a7230f697f12b290a6c3cea284ec8ba109512e6b9033c3bf3cdbcf74c3d3c3. 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/SE5XG2422513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc98407e9b279e73154cad963878657c05ab8e6f9aabd9d32af73a172f2b25a1. 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/SE5XG2422514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033cdbcde9107ab4d90700c36ab8c40663e47b0f23a94c79e221f3c2758e2cc8. 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/SE5XG2422515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac8bddf4209ef200bfb0a13c38260b41120a78aaedce3e0b6629b8538e6f6ef. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SE5XG2422516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee13f644f3a34a3dc5a3b34259cb2208077cb2ba27ff191f80905c47eea4cc9a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SE5XG2422517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ea9f424a8ac0db3226b3a95fb114c8abc25069e2e60ce6a2abb670d895e323. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/SE5XG2422518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b5f287b2d7f317494901e4d45bde01bb976cc0bd15ccd6782d3bb74bcd9827. 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/SE5XG2422519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece0b88ce61121edaeb4a7c6d2c43fdb52e76123ed0f1bbab5720c0bceea7278. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SE5XG2422521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2efa5d7faac660af0688a1eeab6f0b7c98a7cfdcf1ab77ac76ea8f56d12acd. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE5XG2422522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7778891e79b6a2a04fa70eef0aaf70b28a02f2ee16fa64b2d0f7680c7263bd89. 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/SE5XG2422523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9265a22863b6f2b388fad71f3b7f1d8de4a1f6214b088642bf5440034516ef13. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/SE5XG2422524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9b11a51b785e601c7fe4b5ade35597e28b832e94f497c5c8af48a9eab255df. 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/SE5XG2422525.
Arutiunian: Theme and Variations: Variation II. - Allegro assai
Theme and Variations: Variation II. - Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7288fa422c06064ce08bcae64761ec28c82a2f37bc3bb45d64da829385e9bad5. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/NOEHX2520080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028245b7072a93df5ba223ceee89b5da30e766e2a66b38cb95a05afca1fb275d. 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/USB8U1514684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f1ae564ef89b0544d809d440001ad72dff88a0a1c945592f079c67c832fa57. 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/NOEHX2220090.
Vaughan Williams, R.: Bass Tuba Concerto in F Minor / Francaix, J.: Quadruple Concerto / Waxman, F.: Athaneal (20Th Century Wind Concertos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe569ce96a047c94aea170ae48ba091975db5158c7c3ef0aec443502c4e786927. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/DEB260500046.