Barbra Lica is a Canadian jazz singer and songwriter based in Toronto. She was named one of Canada's top upcoming female jazz artists and was the first runner-up in the 2013 Sarah Vaughan Internationa
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 0x6308ae411b7df93e34f176abcbc34b0bfcb63eaac99382a63b9c4a5be8e9c41c. 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/1e264753-4fb8-4aa6-b9fc-d8afef972346.json and https://artists.proofprofile.net/proofs/artist/1e264753-4fb8-4aa6-b9fc-d8afef972346.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 0xf9c2c301dc9ad199b94b60cf982921eb0ebce1a3459eb38d67d35b8579e89c07. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CASZ91200138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974c8803b5831262f47677cb19628b4538f2a850b40d2f8a1e2f9ae5f38d67cf. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/CASZ91200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d218712e5d02f900218d3f1b410f4f0fb75dfad934d32d44a45d6043f227f63. 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/CAI370571727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf032f7d2dac5a04a9d287a01f530e43e638cbfd5c9a022d84b373accc6aa82ec. 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/CAI370571728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bac0f794e99bd24e16993081f1e2ae1eb7c53d28052e841cd271f2fc90deb7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CAI370571729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c3e41a7e7aaef221e314c92adb3e340ed764b9f843be7b90bbb6977874be7d. 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/CAI370571731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4689fa433fb93858ac3397b68fde2bcd7d84609ccb5db1eb2c7ab885f2afd9. 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/CAI370571732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe392e0017946ded8dcfdff4f5a0ab70e24a179329f2e0b31992ee6b573e8ec91. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CAJ221600140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90eff4b461c58670c42943aa753a5c73f86e34aa142e1c4bd10ca5d8cccace5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CAJ221600141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e21492dba6e1ed4e626f90e80b1ee7eccc4ef07764713fe30aa0d9c9078600b. 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/CAJ221600148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b5439e2eabf0db59fd0dd85e395413dedd67086b6011fa3474e0810c96d1d8. 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/CAJ221800086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4059e77e406606fe7c5b61c7eeba02d4e8be9d025120e47ca672ddc092fe843b. 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/CAXR72200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0128911ce166d8796a21c0b83cd6a5476b360870ed9158e7e1e5e92cb0308dd6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAXR72200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e69ab671f44a2464eff1b7e72166effd1fe61319b9c94267aa71196062206d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CAI372500638.