In music, a cadenza (from , meaning cadence; plural, cadenze ) is, generically, an improvised or written-out ornamental passage played or sung by a soloist(s), usually in a "free" rhythmic style, and
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 0xcb5439737e0aed181d77dbd9e3d0af6dce03fcc7528c52243d694af7302bafc4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d9f2f72-8e9e-4815-b341-35f30884e1f1.json and https://artists.proofprofile.net/proofs/artist/9d9f2f72-8e9e-4815-b341-35f30884e1f1.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 0xfafa3216d4af16c3e333b9ee7bc7202ab8cf269d0624c2dd181a068940d30072. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZDA72362146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031027945a0728da125c9d1c6d0f5e6520957d559659aa8a77e61140e1dbf8f9. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZHN82277405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd223629187a0c80173eded3aff2e7226c24b16e58f3fed9d43ea05591d816f6e. 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/QZHN82277415.
Don't let your heart be troubled (D&B Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9396957623851bd0a32524f7e8e5f32b7f127f3bd3c8b8114c3110fe2fc34b30. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZHN82277403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6114c285fd7edb1de27e155fea93392e307b94f72791ba048e43d6f5a994edbd. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZHN82277413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6890dfa9a81e503441ec8558516eb42117ef95df75e770b58456a00baed64071. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN82277408.
Jesus healing a heart condition (D&B Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3500c62db6f4ba46ff020e4fea8bc763fe9f07fac0f8179fd01c85d8c8569ea4. 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/QZTB32381520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3496d11bd6ed685ca7e29cc20ef4f59d1681898fdfe3b884f72b9828bf55dfed. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZTB32381521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf398689d4ae5e261134f3995a61f1e70ed9996691992342e2cd45622e54c940c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZHN92429952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d918c43a144a9ef03f9f6a6dbc03f14510e99150cba50084de0b029f0c59db. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:40:33Z), 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/QZHN92429954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3748dbfa6628c2d74b690bccc63f3cc73bc64fe35fb3ebf32e49030988c64870. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN92429979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc613e4c3a59a7f144eb974154ffe12ee992e982661ea6b9ef3227d532248ee95. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN92429980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1ed7d03238d6cd9a4020af2078e205f5dd121f6afb50415ad555148ed26540. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN92435678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c4a718936235557d1b8eb3911d744435c12640ffb1c63f8f0b443f743d7eab. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ42599430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd895d1a998c29a0395459932d0b4ae4f2c0263d3796fb288ca172776c3079716. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFZ42599431.
Never too late (Hip Hop Instrumental Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f6f6b5f75d5e01b9b86efda2a1cb25f9a11b4293ebeccf15d3907430c5af1b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:18:55Z), 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/QZFZ62501726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5924e7f7ebd748e541c89dc10ad513dc7b6ffeb5885f1b67bb7fdff3808187. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZHNC2281585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70752944423d8a7d49d6d4144b6b848efef7023235bd6ae3957fa6786a3d9c81. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZWFG2565581.