thumb|300x300px|Pianoboy at the Green Theater (2014) Pianoboy is the solo project of Ukrainian musician Dmytro Shurov (former keyboardist for Okean Elzy, Esthetic Education, and Zemfira) created in 20
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 0x9e17f70f95113d670cc2226e8314bf4c1dae42a1dbe4e8beb78ed29ab80148c5. 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/bc591ba0-bb6a-4f54-a8bc-d4f4ad9dd149.json and https://artists.proofprofile.net/proofs/artist/bc591ba0-bb6a-4f54-a8bc-d4f4ad9dd149.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 0x1a6f7232028270eff1e8fb009ebde3ff972119796ff5f16f97be6c76ccff1224. 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/DGA062242726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1093272ffa8960ae9398c2e053034b5594cb5b60b401d95190b93005e4467e19. 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/DGA062242732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62805f737f1f9a04d3363bd72ddff64da4916bbbf8071c9c46a69936401723b9. 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/FR2X42096548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3b45700639928cbf7a3a748e733a1f07873038cfb7b08d3c939f9cce92c7d2. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FRX762018388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34389cb7ef7050adc20206a88cd67ce4c24ea42114f5ab6fad8ffb9a3cdfeadc. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/RUB731510212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a350d839deb7a5ac065a9ef3454f0c5ac1f5de249deeec648026607715f6b4. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/RUB731538984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe220c499c7dbd993b17e1449269a71d4feb2ce59afdabefbb852d0377e881eb1. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/RUB731510218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66130fa725ac11dba3385b5a22a8138e43e5b82c49e03579fa9f5e1358371e59. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FRX282212725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b46f2bcd16b38c8fbd9555e9a5542c397195eab8052a926e70a4a28864594d. Chain 2 (Bitcoin): anchored in block 957839 (2026-07-13T10:06:30Z), 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/UABM12400544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf55639e31b6695ed8e8ad9be8d340e4f44912c0670eb2c3dc7c47a1c06f3bbc. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FRX282597706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997821974101b4092bdcc903bc5e6383191a6b172bf7b379970f89e8d61873b3. 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/FR6V81944309.