Karina may refer to: People Karina (name), a female given name (including a list of people with the given name) Karina (American singer) (born 1991) Karina (Spanish singer) (born 1946) Karina (Venezu
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 0xd7f9abfc6aa1d641dd93392a4b4121d25b3e313e43891dd25ddbfd5c338c5790. 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/2c899238-24eb-4891-a74f-4af40ef7a0d6.json and https://artists.proofprofile.net/proofs/artist/2c899238-24eb-4891-a74f-4af40ef7a0d6.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 0x895c87ab30fb2fc73e52f6bf8b8870f17fe4221d932f0bb423a9770d12490ff5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARP7V2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5d414902bbf5c04cb860c056f4cbc37f5691abcbfae99e8ef682ff04ddd76a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARP7V2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89447962fbc30e2b28e077f5e1286a08e1889dbf03c989da4660f9db8c09afd. 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/ARP7V2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7d0f1e795c1d49781446f1342db8f8969825f00dec7dfdddfa152fd4ed563b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARLWE2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb031c38072e6da65840533edd42a01f9b11f9574c4a24f92275c70cc8117f4. 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/ARCS92200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7286ea538cf037e5931232cad92914f484e2fee3d5a34595d4b0be41981fea5c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARCS92200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f616a4d6c9f47f262fd5fc14b0f73a54b7f02ccd5da869fc9de6aaea7935232. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARP7V2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895c87ab30fb2fc73e52f6bf8b8870f17fe4221d932f0bb423a9770d12490ff5. 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/ARP7V2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc89d6cbd4c1c349cfbea942d41516e5daadc71ba21d97508ae4be83ba2d5bc4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLAA22300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd80b070339350f43820213775064c1cd2f536615feb4fe964cb828c5e44155b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARCS92100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed124b05f2001802b5d0d134fdf963588254501a25ee18cd3927b35313a7536. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USDY42402710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa998d5fb2c6dcb9580dbd6c57c0e62f4c966c34e156a5b1f35b80be1a16145. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARF842300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb031c38072e6da65840533edd42a01f9b11f9574c4a24f92275c70cc8117f4. 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/ARCS92200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d552d7e57208444d6d703d35485457302507b64444532c399cc365d83d25dc5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARG991043095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b116a50740ae0201db27a5c439a0714f37447da354190ebc3f9ba25b5cdb55. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJW2346902.