Cassol is a surname. Notable people with the surname include: Fabrizio Cassol (born 1964), Belgian saxophonist Federica Cassol (born 2000), Italian cross-country skier Ivo Cassol (born 1959), Brazil
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 0x64325b1aafa685da2553be11a196eae66b753de6ed30433409917edbbcc95eaa. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47dd69ad-59d8-42bc-a8b8-1d2513d82002.json and https://artists.proofprofile.net/proofs/artist/47dd69ad-59d8-42bc-a8b8-1d2513d82002.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 0x22774e5b7013b9c115c801cca99875fcc4a4c519949615673af2a1bc482a9d4e. 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/QZGLM2395430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97970f5fdfff051f9a460757c7751799ba8632906caf34cceeaf5a090669a03f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BCX8H2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48c2d4bc5b957c9e380b832435a5180b9bb3e06bed0f52a7f65e4bee5e8df6c. 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/BKM2L2400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4956c1c6e34e3b73f59bff1e3b5733368e58d132153a3368f1b22a205900631b. 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/BXQHQ2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe229e0cd2f665a413b4608227bbe01e6d5f54b7a463c5cc87cbea64acb80ef4f. 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/BC9ZH2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4c98ddb045cc9df24544222af499742eaadd98422c5250defaa2720eeb68ed. 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/BCIOS2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c7da544f2e66260ad878bade62f2c068b3b4540eae372e06098f59eb9e2943. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNJY2149849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cabaf16616daffcf8367d82f039dfbbe3398385cc07ab6c8da0ede38092b54. 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/QZNJY2149850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585d89fae503e9b818da9c55fd0e820b7670b242ba92eab238aea784360082b4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNJY2149851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9178d559a32923ae056a0eeaf61ea5ad2569897203f2163182cf43f0834cd892. 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/QZNJY2149854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d89afae28626a44f1ee735f0241239510b281c1f0e1b7ebf6a2f43d0b97907. 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/QZNJY2149852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943d462adcd78173c874462cc74d5968542662fbbb21855aa6f42d0e7fa85164. 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/QZNJY2149853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475d90636878a0d209646d37fd6af569f36b903b6e5170e76d3da5c95ba54f6c. 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/QZNJY2149855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2585aa356dba4b56db2ba1dedbb2e07e6e260aeec725dab686670e95a33d531. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTPX2322142.
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 0x2e23c6d363bae6dbbe355654302bcadaa70439e2c65f60ee8891bce8d8b134be. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/BCGQX2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaecd8cf36204934dfe1cbfdf159fb472ff91bbae5c1334d11a0c3b9a340f97. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/BCGQX2200011.