A sabre or saber ( ) is a type of backsword with a curved blade associated with the light cavalry of the early modern and Napoleonic periods. Originally associated with Central European cavalry such
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 0x7a0277d765e8c34024d5467551454bc7b98950ce42b34eb58046349684752f68. 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/5194bc8e-a897-4173-8511-a67ae76d6492.json and https://artists.proofprofile.net/proofs/artist/5194bc8e-a897-4173-8511-a67ae76d6492.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 0xe479f0331748a7566573ae50e24ad105677e4edbf6b049d93040108daf3ec6bb. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GBVPL1100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1885b1ad6d2862d9e694b1f58d06c44857419fef4ea1d3d08d020644e15b7381. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/GBVPL1200017.
Pinch Me / Hollow Moon (Bonus Track Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ed428e53edeaa619475d68fa9448a0eefe0c35b1adabfa6390970fb6aac144. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKEWB1600056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc04f8be5eb99e65c175448463a1c8505c3bf1a3223a718a1a2d6ec374d1e55. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBAJE8300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa900543db459c66745c449cf53472df351caeb8931d8c385c5fb7867ef2294da. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBAJE8300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccde6861349831a2db5ac615f20382b86814f9511fb7587e30cc5bc66f749d1. 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/GBPWR1300256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48ace1e48c2ffc269ac8db5e703daf77ddfa4836773642ac585260a30f4955f. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/GBPWR0900083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c400a57501ec218ff6a42ed27773996a3f59840f372a161f1a64eb0b3593321. 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/GBEXH1900324.
Critical Music Presents: Underground Sonics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cee32566a9ce3f0822c43cea08234d56ffbae4374e526cd4f29a955ef2fa9f. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBVPL1300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc891c5b1bc7f18b1798cf83d052b8d42093cd7121f901351e84a506014239b74. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/NZIL01200002.
The Platinum Series (Metalheadz Presents)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39667d6b8ef8861a29722aed0c58959a98e1eb2c2968d38a72a55500db539594. 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/GBBHF0725008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3d6f8caf47e9eddc75e8b69b7cb2aa37bf0f2c956f91e18cd9d19e1df8a853. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USQY51531045.