The tenor is a type of male singing voice whose vocal range lies between the countertenor and baritone voice types. It is the highest male chest-voice type. Composers typically write music for the ten
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 0xd24fde16596cac94e451d3985790a1771310b83d4d617464848672e509033f82. 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/1f016d1c-86e0-4e41-8ca4-0dcdef946a08.json and https://artists.proofprofile.net/proofs/artist/1f016d1c-86e0-4e41-8ca4-0dcdef946a08.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La fille la est laide (Le gars la est laid Rmx)
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 0xc27bf7a35ecc0162582209b0aa783d7f54890153a43679cc45099eaa81bfe37f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRUM71800643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b86521d6058bbcfc528a927957b19a67b41204516d839f7158303f49dc6275. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/FRUM71801200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7beffa4e8cada8857d0f31bb28043cef74ff0c602a2313a018324bfac25dbf. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FRUM71801201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777e9cdf7a53c529f53aeb3341771a9c26e02565b0b07701d12eff50919a086a. 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/CIUM72000399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e0cc7de0646b02880aacbca97f76f95302c4934af6c4a8ba1243bb93c40308. 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/CIUM72100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb1ea6ac64af3513ab66dfb7f5602e64cec50ec2ce66bd9dbee8d05c3962632. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/CIUM72100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb605b201d0b935f2024882c02365c5e67748860b72cdcc99a78ebd323e99994. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/CI2DY2200479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c99e4420a1116bbe946683fb2e8e5a8f22adbc0de71d616c72a6bafb0244e0b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CI2DY2300432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1c755a2dae8df9c98e2340105b7b7873a3d6bcd20a1a6f478094f754193d4c. 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/CI2DY2300528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55bcb59b72b31ae8f1cbcfa3633efb0d7cbded7f2b877c2434046b25fa7ec5d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/CI2DY2300532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb605b201d0b935f2024882c02365c5e67748860b72cdcc99a78ebd323e99994. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/CI2DY2200479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0674a9a1146f75921bc711457c89fa5eb90945c7b03797ddb4df536c3cf78818. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZDA52592245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c401cb8baaab42f05457eac36021436a5677b22b9175a2db4189d1f4d44101b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FR2N42500150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d336de21b9ea61268ac5b34bf996292483abd879bdfe9c4886000c38e97070. 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/QZNWW2064946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e8cb93fa1259424e9da8508b995c0c05259353a07ab966dbbc3a724b94beda. 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/QZHNC2130474.