Petrovich is a patronymic surname derived from the Slavic-style patronymic derived from a Slavic form of the given name Peter. It addition, it may be an English-language phonemic rendering of the surn
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 0xd2a47d5b70c3aa294d080035c5924eeeb02ad42665e06da9ad16ab77bcc2cdd9. 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/efa303b7-c155-4817-b880-23963ba4235a.json and https://artists.proofprofile.net/proofs/artist/efa303b7-c155-4817-b880-23963ba4235a.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 0x1a322fc82fc34d453664f62efdc970d715e2c587102528a7d2f3c92ca861a643. 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/AEA0Q2013474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa599460c4326ce4e20d5d69be512063712ae5844ee04f328c8c9204b44b983a. 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/AEA0Q2013475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84a003ce61ad1282b0961df21926dda2dae0d97ffdc8ecc60f06e9b217b8be6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/AEA0Q2013476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f79936361ca3b6582897360a05a374f6767f399aed59b65bbb01e0d4f7d61a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/AEA0Q2013477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57e45efb292f3f88f946fba8061c27bc21b81c9b2bb20a81692830cd3078db2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/AEA0Q2013479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864f45f01e3230dff3b5af72f90b78c0bafd8d40218211c3aa36e8064b9b6af7. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/RUA1D2105351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0644178f085f0cdef424eb7d0f03d4770cbf7bb0061f2f6b320ecdedb9358357. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/SE6I32401541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6984354a2375c143b8c753abca553e937bbe923596b86e8b2ae0fa8fc7dc0a. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/UKR6V2483005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec37761eb257bd0920ed7f7f9d5d77d79458ecf4b5106ffb05bfc6bbb32c6d1. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/SE5BU2476638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94ce7c66ff6285bc5e17865d7c5b99b5b69a24614e5a5d4848e8e6ef5896fd9. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/RUA1H2489444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53a6e5eb3aba2ed9d66bea41b2710a11ecaa558af39d07567d4ace52c390190. 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/SE6XX2366539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa599460c4326ce4e20d5d69be512063712ae5844ee04f328c8c9204b44b983a. 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/AEA0Q2013475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57e45efb292f3f88f946fba8061c27bc21b81c9b2bb20a81692830cd3078db2. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/AEA0Q2013479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c522324f18888b939b71dc326ab2cfa44d4f6bf56a84b85cb7ff77c0fcdb355. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/SE6XW2391994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f947189a944d29746f55a6c373ff6a9bf5060481e0856afb1b468c78fef061c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SE6SA2389931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5503e91d72e9051084f1d3cab4d2b12b8ba1b210978a3653d80697b007a8e9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SE6QE2392604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ce375871101a66662d273c856b4007350d21859900ce648eff1a1406054c75. 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/SE6TI2376068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ff8ee2e3d9e30ee605b1aa0038325d4e98859e9abb824133fd27a5669fe4c8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE6SA2317925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf823c18d7aef31a4f6b39fd282e7c2415b62dede3e12fd23e888634bdd0d034a. 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/RUA3R2146469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c5b0b63e11d441caf6292c428cbc5935a24610116eebcd1cd74a1860554477. 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/RUA3R2146472.