Sylvie may refer to: Sylvie (novel), an 1853 novel by Gérard de Nerval Sylvie (actress) (1883–1970), French actress Sylvie (band), a Canadian rock band from Regina, active in the 2000s Sylvie (al
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 0x02824e49a64864f70962d09c0c84f164503eadd049ae2d4e79a414cadaf51971. 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/61926eb2-e229-492e-b02c-3ae0e9e01890.json and https://artists.proofprofile.net/proofs/artist/61926eb2-e229-492e-b02c-3ae0e9e01890.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 0xcad10ef761a67aa586503bd526548559ab692c6197f5b940c468ba811b13eeda. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QMFME2101922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96949884a4948e5e18a142bfbd5df0adec298293744edf12dae809f2779ba25b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QMBZ92193397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad10ef761a67aa586503bd526548559ab692c6197f5b940c468ba811b13eeda. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QMFME2101922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4fb476a87cce89f20f1e982cebea9a7f9fa68a350836674cd50d97ae40d07e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBJXP2245001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebba4cee53ce233be7987d1ec18a8380fecd6fce4cd5b5adfd22fea860c3568f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QMFME2128285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdaad6990077884642da2b7a4292acc90c316e080dc8fd76756e4f91c753fa5. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/GBJXP2245002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7aa32c7684122b62695188903758fc88d0a784e4ea4990f16bf8fd2623137b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBJXP2345301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5462d2e8f02aa04c44618a72588a778ba55223cf20b175ce27bad7ade3788e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCW62415803.
Like Someone I Know: A Celebration of Margo Guryan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d63495e3ab52e4cebae72a7f740741bd297ebb08ca5727ccba7dbe15ee39b5. 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/USSUB2464409.