Frasco is a village and former municipality in the district of Locarno in the canton of Ticino in Switzerland. On 17 October 2020 the former municipalities of Vogorno, Sonogno, Corippo, Brione (Verzas
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 0x5a0bbca20faa121776ccd08c5bb2e1fffee83f05f7c6d8cf83f400eaab2ee279. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76025170-4508-495a-856b-5626701d633a.json and https://artists.proofprofile.net/proofs/artist/76025170-4508-495a-856b-5626701d633a.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 0xd331a4cd7fad0fee69984c9b376f8ce082f6a53d8c5927218faabf3c50567575. 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/JPB602069148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215eb54fddeb8f0289baf17df584cc7d151c256a02f3abe77d094b3d982308ab. 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/JPB602180401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd430d29f71aa85ada5ce67e0676c61ce787e2f0a43fc6c33a125efe9a84e2a11. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/JP92N2242744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0a8e34e380bc9c8f50f78d98ceec2f3864395f1beff599623ad0131f4beb18. 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/JPB602186781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008b7971f684ca44efc2d2c7454d6e3cd948220fb60b5e7d9fc863fddeea080f. 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/JPR502150175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9900184737da72df21233eca56a94de0cf94cb53f5cfd39f24d3cc9297f52ec. 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/JPB602174090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20db06c3e76429fc1a330e2e50c5dd5a1a8da77ce6bc0b363bb2a59f64522a4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPB602096201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112a80d56e652e9635be8b6f487c435de08e7ee7f84c42ab54e04b6702542e48. 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/JPB602078382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68548fc0566f7cb8f1f19ee132976b24b98c7d349ee1ef57da3778dadb4b2232. 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/TCJPM2013062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61c8d5329a6b045212a22cc0f0b45979b8cc957b846f41ebea63101843a5db3. 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/JPZ921700055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4ef6e860fa0f3880c1e5b915c8ee3bf880ebd0be89592d169da002e5e6c1d8. 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/TCJPI1943879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e889f24bd89840a093224420751293949e9e1e11665191f847d5256b10c1d27. 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/TCJPI1954592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21655760480cf05420786ad91dda3f1c48aa6968693de6a09f8e01d5e018a8fd. 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/TCJPH1853155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40358b3522b2ae27b97d7a69764ed50f4e58d8026179aa5765cc7c77a7fc0da. 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/TCJPG1884854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ebaf2da3c99acc9b407cb4a4a68861bd5d195089728b996cfaf3f8ab5ff2a8. 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/TCJPG1891143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5689976cce47a2a291d252e9e2967e54bdd1aaa38397f25f85afe291d9c56f0f. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/TCJPG1870077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ef37a078d0947b0489fd4b511f266e6d05221775604269df3983c06b878081. 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/TCJPG1895401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dafa462907a38eec3dfb085ec235439a16a7fb61083bc431951a7780e47490. 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/TCJPF1726227.