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 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 0x6df6d99bc18e2225061ca66b59ca6f4fcb3c0932d46095777aa825bae73686db. 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/b7118327-7fc4-4f8f-9c6d-8a448614324a.json and https://artists.proofprofile.net/proofs/artist/b7118327-7fc4-4f8f-9c6d-8a448614324a.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 0xf3c5da24196a09ffafbcec5330af1d291a5c291c510852dda060bc5c969e6736. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBARL1401312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90106e8a5702d75f1c49b3b63de20a0adae8f7100a87bdc4bdc5286ce064fbc5. 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/GBARL1700203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1ce9c67bd6644d79cb69d3c3e39d8a11179640a59836759ae25e83810757c0. 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/GBARL1700220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020f82f1ae8658f0ea8b5dd35131617d8088b1720e42bcc97ec79d6b20b06530. 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/GBARL1700219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cde2a9f980b6bdca104ec1965d67bffdc9381d3b701c86199d8e0528ab47e5. 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/QM6P42082608.
Up Inna (Beam, Cham & Alicai Harley Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb7cd9ac658541000edc256b0c065409a3da679728b40109cb06b7dfdbbf902. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM7282000585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696d985b712c4e2c02282cea5d16f2f9a00776c3ad75e60b0a593130fc14bff3. 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/QM7282031576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50ec4bdd68036bf6707bd4b44e818c73b77ebc3868665409c3a247e556c8091. 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/QM7282031657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f6edfae35e39a0193f1b1dc308928c03269f67cc2f28ee3b00443ea978c8e4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKPL1805609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e5cbd5f15bfe48a7c579d75df7af46668287b07546b4c117970b177afff22c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TX2026063.
When Will I Stop Dreaming (feat. Loyle Carner & Kiko Bun)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093696e39c6ad882e8508a3f9e8cee3e5d3fa8ddf321c2ab4577bbc8ab1c87ee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBARL1500343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d32ce4c0c07894bfc95ad084b09bed6a5257feeb40c986a4bbd6126abd77371. 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/QM4TW2062789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da21f01e752a110417d0fa024d822522bfbd45a93f2a697bc8a6b243a8f4f84. 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/QM4TX2007439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e5cbd5f15bfe48a7c579d75df7af46668287b07546b4c117970b177afff22c. 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/QM4TX2026063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fd36fad7422e19edcf95517d18ddc26d431e9426df22b9e8ecf799e8306cc1. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QM4TX2026723.