Barbarossa, a name meaning "red beard" in Italian, primarily refers to: Frederick Barbarossa (1122–1190), Holy Roman Emperor Hayreddin Barbarossa (c. 1478–1546), Ottoman admiral Operation Barbaros
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 0xdbdf4b32d933486a8643908be067bf3e19bb5a36706d03f8d860d5db89dabc20. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbdc568d-bbcc-4eab-a091-6b79aa476ac5.json and https://artists.proofprofile.net/proofs/artist/dbdc568d-bbcc-4eab-a091-6b79aa476ac5.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 0x742b16522e080c646bd9f57fce764414afd1908f7562c10aa03ab02f93cc3455. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/DEYW82301672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822dafebe33f469bed9b6186ee66d6e9fe1f5889e9870ab638261e29871ee930. 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/DEYW82301673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e39af71d5c48ec85750a41a3d0ad812313df8f6d80a092ef32499a5db373bf. 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/DEYW82301675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241ac120626aacd08343067ff21854d815d22193ab5193e9207e67505ef28815. 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/DEYW82301680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4a56654dd93faaff917901cbac62d3c5df4b8ac962580b27d760778c5be306. 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/QZTAS2486137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fcb881da17ee5b4e1ae2b0c2f564e2065cad5d8fb671c1435fae12a8980a92. 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/DEYW82406441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4336a23b13970a65a9932bd75bbfee6fc52b3342ce20b47f8e14a40d3649e903. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEYW82400906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10949a4ef71d972af40c3523e523a17f6d0bc0274423e2368bf05c96d015552. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEYW82400907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c44f80ea70f094eb688ef09c5d46950d904b4c86112ed562b073a8182c136e. 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/DEYW82400908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83010c1b21738a479ab295a46be1541a5d66acef03d2d1a4cf24a77722555bcb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEYW82400909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751a40584800a42beab2424086e9eb0f1d5826f65a32dcd69013e81a0af33e74. 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/DEYW82400910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7c191a861a3fa40dcec32882b05d018b7bd6fda6c624ee114320913363244f. 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/DEYW82400911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3737b53eee9bd22cee74cf2bdc873508571b47aef10ad612004f4abe362208b4. 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/DEYW82411680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967e3e9c5d18514d226a9263141cedcc09586f0c6c317eaaf492ba6d6f7ffc19. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEYW82411681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99223ca1fc7f1653cfdd94593fc3c95cf5b17dbce6b86ad3578bffd2a1198ae3. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/DEYW82411683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18e894d7706495f2171d906016ba89288bba7c2b2e688e8edd4ae72c8004079. 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/DEYW82411685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687c32065eaafcbea038db4fa07593e8f122147d33da5ed3cc54782201406cae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEYW82411686.
Die Lieder der außergewöhnlichen Bembelgang