thumb|Ashik Ağalar Mikayılov playing the saz thumb|Ashugh Jivani (center, playing the kamani) with instrumentalists right|200px|thumbnail|Soviet stamp from 1962 devoted to Sayat-Nova's 250 anniversary
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 0x27764fc2eb5660801e28603738054aaf9d46eb272086e251f65cb7dfeaf85af3. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c047fdb-64e9-4297-a4ef-41a5e43f890d.json and https://artists.proofprofile.net/proofs/artist/9c047fdb-64e9-4297-a4ef-41a5e43f890d.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 0x7f9b10a9674afda50d94ee3001e091ea6e3d728a912bba1504179a6e83b25bee. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ32521461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0751fd0e13451aee94c04019aaec2bf261e2f6e80b3d5e35d8cb7cbed4c842. 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/QZDA42568401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd50ae5eb0f96f6478cfadb852eec246055ba8ad5d8d1c4685cd112c630f9b57. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZDA62576683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8060b28b0d1513c46051d905f964d22bbfccd7ad587534e5b1d14b642f0798. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZHN52580461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861d418f7abb7fee9aa1210d8f88121350c47c6835b9dc2db543b8f02d83041d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN92505384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44ddc222e135fffe3f2519ec49c3844d4e4ac2f05f994df26218e13c1579ed2. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZK6N2537984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba2042ac9487326dbc86478f12be43ed61b94e1abe4aa41d0008712cf8b862c. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZK6N2537985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421a9e2297457c519be5710c563a897ac4c1939b22ddb197a0d02130d74e196b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6N2537986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8919aa44a64381f61fafd65212c56655e1490080d088b3fa5dfe47947ce44d23. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6N2537988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bde00ba7e8ae22032015cddfc588852c4f92fa14b4024ce323a852ac00c032a. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZK6N2537989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c09fb5c9f3b2bd21b3d963dd31a67351cd7fbc78b8335e829b26c2176ca1b70. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/QZK6N2537990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6517ff82baf80aabb9e3e45e390cde89e7adfed1d1a671a0267a315f080cc3. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZK6N2537991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeac46a0e14841e69959b58cf4b40a6dd7069b1703eb972bcf82c51134d49827. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZK6N2537992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55cab91cb2ce437efd552b4795efa8db503a24f7371343fb100243d52e0ae96. 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/QZK6N2537993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b384c6c68ff4168fad9bc99a8c863e56b0dbd38bb8b585d51f5d9d4649cfd5. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZK6N2537994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd0dabbf2073ea301ae75035d8783af2f537627ca170c4b209f07706fd7f4dd. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZK6N2537995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd886e2affcce9bf00249ac204210f7e163d052bd0dfa310b71dfa610f833997. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZK6N2537996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c64aba41ebdf41bc73faea81468c54ba50a49969de47036a686911ff67f115d. 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/QZTAZ2509821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30136fa4ab451a9fd2e8f4688ed7a3e26c8a962fb78b780f0f1925cda6e8fc5c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTAZ2509823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e37bac46b766963ab071a278138e5c2cfb6b2fa5062da6ad533069305ccdc68. 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/QZZ7S2558239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf841051dab8d859c778b17a3a7973b5b6f1f523b76cc3d2074377e252b1c42c2. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZZ7S2558242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e87550290d99b2725dbc37dcf117b27c4e27d919492ea4fac18ba952e9cff6. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3FG2587967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23618646a73b59b6b0f1b25035a1462baf1f7df7d221fa3fa845d858223c6c24. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QT6EA2583555.