Sara Jovanović (; ; born 29 October 1993), professionally known as Sara Jo, is a Serbian singer, songwriter, model and actress. Born in Rome, she came to prominence upon competing on Prvi glas Srbije
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 0xe2bcff5461905f1f28447f3632495e9d5cdb58138d24372d2e15635a9fc15ff1. 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/d7d990cb-b18f-4c72-8517-572bc030020c.json and https://artists.proofprofile.net/proofs/artist/d7d990cb-b18f-4c72-8517-572bc030020c.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 0xb8769e5ba3b216eee1f3218671162346486d892e85bc589405a482fbb6d542b1. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/RSA131410801.
Tri Boje Zvuka (Live at RTS Studio 8, 2015)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61233942f038933512dd99c1eefb018849bced6e2ea602c7e28919f69502c6c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:03:48Z), 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/RSA221500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c54750c31ec86a9f37e97f597b52000a3dfb575081ee390f8b8913fe74a8ba. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/RSA221500583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4620e7eb30519e1203c2a23f1622d19250738d56f72ec4f32705cde26939b47. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/RSZ141700181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6519d2b2452bf1ab0b9d6987e985c4fc315285d2a019c4d719777e3673a944f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RSA221701282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8b41bfca73e0b9f284cecaabb9f1ea2e0839c7cc17bc25edeb202dc48092d7. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/RSA221900601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bc3105144e494ea97a7fec01f8cf48bd95876478625ee7943b0d3599c2dc7c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/RSA222010358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a83d4d58229ab60ee4985f3f197834be1b71ded6c74dfddaf4046c82314374. 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/RSA3U2200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7636474e30a2c4ae8ab6f3eb8af79902e832c5ebe6b9f7dc0b3fe5067af83534. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:42:58Z), 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/RSA3U2300238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8291f9320a79d272e9a341609ea4b99d97a0a7d9e69382fea2b145de8f879b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/RSA3U2300239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ab476bcfc39c950ab0a0666f6d8d7852e7eb3d672e7376045427c59a7e380f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/RSA3U2300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf619724942e01f180db72de4903618d6f0becf00aea29cccc565b310064776f7. 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/RSA3U2300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2a88ecdeaa545b1508814df1aeffe0e1d185dd092d522988411b6c120e471e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RSA3U2300244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6acda77307baa6b4567b8e5857f39c502b3e21a637030a7e68d44b70ac531aa. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:42:52Z), 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/RSA3U2300245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a89eb98515259bf275f40e12cee5dafcbf5e1f8fdd12c9ab963fdb19d6869e8. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/DEKB72503546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5413402a005929cf44ce8e446a0c592844f9aadb5ce067ff5939f8fcc88ddb7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/RSA221991434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15553fd32d331f8fb93506cd2d46db4a5f0ae4bf2baccf44821f3595316a6870. 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/RSA221991436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41cb858ff5a4ce18ae798568e01e9d841e6422252ea6007eaa01c0b6f341530. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/RSA221991438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe23f504a0b927c44a4ed37211f1ddb26238235b2dc5dd345fe61d378aaeb9d4. 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/RSA221991443.