Carlos Bica is a Portuguese jazz bassist. Career Bica studied at the Academia dos Amadores de Musica in Lisbon and the Hochschule für Musik in Würzburg. He was "Musician of the Year" in Portugal in 1
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 0xee9f16f17527d2a78261fd609123c356607c60cf0fbe90f0f813e83745ab1d2e. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82836e9a-ecd3-4f5a-ba52-c7de82cac6e0.json and https://artists.proofprofile.net/proofs/artist/82836e9a-ecd3-4f5a-ba52-c7de82cac6e0.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 0x6d13af65fa70386d465a6f61f79ef78b6a2df1830c0ce9224e6bd8b228746126. 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/PTUM10300649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a59d39fd5ba90a90f3417078d85b14f7d4572f9a5520afeaa410e2a99dc3a47. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PTUM10300650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee6cff8ce14ef68d766baf74f2cc6dc66d3e729d7d5c9f2b3c3045d9fed7819. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PTUM10300652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37531b883404627175264a0f11601d884fcf1de90405c6d5d76b98758d5e1cde. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/PTUM10300648.
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 0xc1c1074697ec286accade627ad68f19c02f099a5ca91afa89305ba3b0903f3a6. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/PTUM10300658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6823e682ac4138892406528fa53986c061656e7085f6b790016532f097f73e3a. 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/PTNF12400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051722a258a8b4a9f7f3b8c955065da1e3b97e98e3339477f1340c572dd3d0c9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PTNF12400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8489774788ad06f307301653fd8b078ad3059c660e4bb30f0dccfa77d457db. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PTNF12400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be9c41cd68378f5e9098997e41b6a06bc5f4b68133121b4fda010e165d3848d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PTNF12400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7411759a449ff40bab6c7cd0b27ee71659c8b7e617280ab69e93ca85babe72. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PTNF12400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491d4d86ed3da8f18521f488cc58a98ec6caace87bbd8bccdc94c4d1a160f60a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PTNF12400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb4d0a1e9a252cb64bc2322da86a35c7901569c366bd5e441682cea73317a01. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/PTNF12400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2f72e5a69d8991700ba3b72a0d7ac38e9fe073d830e6bfa92ada189705edd8. 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/PTNF12400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce260440daabee416d31c62b83e0acf172ae3e160336478b453be53a5f442ec8. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/PTNF12400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50681f1d1da86a9f76767a41158ebea3463cab7339bfb91e58202a5d81eb2d9. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/PTNF12400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f55bbf6245febc6bce1efad25348187099a66ace7f51489be04d9eb21e016e. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/PTNF12400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45008e385812d2b270728cca020db28af9210680071cf1f813508714e624c44. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PTNF12400165.
Ensemble Resonanz & Charly Hübner: Gute Nacht