Erika may refer to: Arts and entertainment Hayasaka Erika (Megatokyo) Erika (Friends) Erika (Pokémon) Erika (Underworld) Erika Itsumi (Girls und Panzer) Erika (film), a 1971 Italian thriller
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 0xa1170112467aed87c6ed7cc2389804ac1ec16d4204112fbe42762f6e8d3bebd0. 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/a0782a41-4231-4429-b763-7bce8882f793.json and https://artists.proofprofile.net/proofs/artist/a0782a41-4231-4429-b763-7bce8882f793.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 0x8868855c9cb4d402b13ed983669430482869b0a8b66fa60dde457d1fa2949d7c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITL010100460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15a991dfeaa832f92dc27d320b00c43344c489ccc60965da2446e12e1ed64e7. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ITL010100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61ddf954d59e29078c7dc896c81ccdb6c1f47c604f79a0447b11c9806309407. 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/ITL010100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115cfa1fc51240778759f9484887dc7c84d5aeb625268251d6ffc49028ea3562. 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/ITLA72000835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61ddf954d59e29078c7dc896c81ccdb6c1f47c604f79a0447b11c9806309407. 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/ITL010100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823cc78a6d53ca4761613c8b65b7622f0d89c6f192c05bfa8e1019a0638c7458. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ITL010100459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adad18ac05b16d737dbf0701ed21b3ee065acbb4d1e216a06178e699bbe05e6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCAJN2508469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0f82b8b787368185e8de8ddafcbcba57136e572afe8d552253b0a9e6a09e44. 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/ESA012560132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08805bee852c265a448be961e9cf264cda0a444afeb8f73ffdb6100c200c9ae2. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TCAJP2563599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6b43fdef963071af61bf7f27e7052d01c0d787237f2610595640baa492ea53. 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/TCAJP2594533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1acbd875206c36d01c4cbbcb23580d2e5c2c17676bf255cc9dbf13293ca5f9d. 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/ITL010300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da00fab1c43788144883f0e9315bd02fef009acb4d8cf60bff26718ee5bd454. 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/ITLA71900654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0566c5203f7148a69a3d9ff40b63dfb5514bff7040a77bb4dbdec92982d65fc3. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ITLA72000889.