thumb|Sofia Vicoveanca in 1983 Sofia Micu (23 September 1941, Toporăuți, Cernăuți County, today in Ukraine), known by her stage name Sofia Vicoveanca (), is a Romanian singer of popular music from the
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e6c77962a002d75e715644848c51eb3de40123c7305a1206055874e7577197. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1cbd7e4f-4636-4276-ba49-f18bd1821432.json and https://artists.proofprofile.net/proofs/artist/1cbd7e4f-4636-4276-ba49-f18bd1821432.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fa7e4769a096fe72356cd7b37eb1bb76a5282a02128bd8fcea134476a2bf42. 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/ROROT0611012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fa7e4769a096fe72356cd7b37eb1bb76a5282a02128bd8fcea134476a2bf42. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ROROT0611012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf0ae583b3fdce3196d8a922187dd4ce9613298647990c14936fa31dab2f19a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ROB010800881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988634c58fecef1c060548de057742b0fca1a4444d1d2bae72ea795a99fd8db3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:23:58Z), 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/ROB010800887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1eecb9f1e237b0452bd859a08684621943230dc3c70b135e8ef2608b3819f4. 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/ROB010800892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d74ce0d7fe204ba5643195d3064f38f60aadad9c5c91461d22e54f6ac1bc0c. 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/ROROT0610109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34872fb35e64a59aa84f986ebeb7896739d7f3da32da296819b43b72a8da6c0. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:02:36Z), 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/ROROT0610101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29fd732dd48fa9da3b5629dd2128599fbd01f5745101c15e4b44acb471117b2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:38Z), 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/ROROT0620304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2918e688c763df7a307890bce50f76d4a3f9c90399a6191e302d9355d0705ef. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/ROROT0800304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8d7b40e0b69d94498f3da18fc05f15acac4d407254888992271ac27510edbc. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ROROT0800308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff5114cf3d4776110748d4d46eb6bc4763f319d5ff5cf84d23baa98c2bd272a. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:39:46Z), 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/ROROT0909101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6d1b8c1dd0238b44d45a2d548473beb4d3bec8552425466f7d1cf4cdd55145. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ROROT0909105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91db5b5558f2e1e400bbdecdbc84f488429f32adf2c996dcf162abfc1aec3c4. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ROROT0909116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bc943997bc4181da6554316f37d1d78b6df4f9695a6eb19892c8b708f32eb3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:26Z), 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/ROROT1110901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92d06bb642d988db80d54c7c43a3693d9372624aaa93edc4c9acb35ee5b6816. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ROROT1519001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc9e3dfd37f811052aeb3592c8cb8ae059839dcf9dc1a7df6e79e8d58b9d6d9. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ROROT1519901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663baece90cfb1585adef5934c2c2f6519bcf58a02eca13ed026c53d14fe2cda. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/ROROT1815201.