Rozen may refer to: Anna Rozen, French writer, best known for her short stories Issi Rozen, Israeli-born jazz guitarist living in Boston, Massachusetts Minna Rozen (born 1947), professor emeritus at
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 0x5cc8e46414f871d29b177de5c01df6851eb3ff6298bd5b36905a03b620e8217f. 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/3573436c-c19d-49f9-bc3e-adf80719450b.json and https://artists.proofprofile.net/proofs/artist/3573436c-c19d-49f9-bc3e-adf80719450b.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 0x36e21a0c2822042921bd070caf26bb08cdcbd928c7924b9fefec8aae3a685fa8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLB172000428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91859539abd959dd724987e56fd7095c2cb3fb7fd31ac9152eb8885a7644d19e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PLB172000195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bc219de23c5004ea378fbaf123123a4767dc6da030d0e5fdbf7adaea8d44fb. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/PLB172000193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bd43e82bd1bd8db36a61ae69e832c6339012db31d47e13a516671c47b08ed6. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/PLB172000197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919266c87cda7d40f5c5437f8ec3d19ad3289d4de2bcfc7e87fcd0faaf62aac7. 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/PLB172000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498f9ed3a66316fa597d9e99d2c453f2ef21d8d1bcb358a5ee4cd47395979a4e. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/PLB172000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83541a679f762849df369496b51f8deb404a8b3b79703d7a89f425090b1e6357. 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/PLB172000199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336624f03dca7097849a425b290919d39ff94c0758a7ce97b674a19ae3fceae7. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/PLB172000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf096a12df2cfadc45ab51309195e0ad5bbbdeed752f79d5c6437b9fc020bbb4a. 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/PLB172200691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fff69181f268c42e5e55a2bfb8ef32cc889ed9c10c3c638b9002f9f68dea38. 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/PLB172400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b9ef3be37f49f2216eeba25c059a3484cf18df0355e94b8f441cb2930a5cac. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PLB172400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3519f479ecd03f13b8863d52f163ebad65891b94236747277bbe14be77a2784b. 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/PLB172400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca6b2952f0820e01cb1038f45deb1fa2462cbf5a2fd03433b9a1f61e28498ac. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/PLB172400116.