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 0x9c04f971cdf80d306d2373cb062f6600f791ee796eb323503ee2e23bf93de1c8. 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/711f5160-757b-4f6a-8779-2167afac966d.json and https://artists.proofprofile.net/proofs/artist/711f5160-757b-4f6a-8779-2167afac966d.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 0x2a480d35972068af6f4813ad9e3a4aeb913973792e9d72016de43ee9212d317f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USCHR1324573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aaa9373ac412c7dc75046cd3b262413e8d7b2d83d5bcf0adbb6aab7f9da180a. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/USCHR1324574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cf2393383b95ecb7d0d70c5cf39a3cbc7ef959d8cb7548ec88fbe16989294a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCHR1324576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3035ad9aede16d565e0fb25afbd1f4629d4fde0325358a45c9705485c1cad9. 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/USCHR1324577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32854a9dbc9761ab8b1d7c6ee5113cf66f3b6956ffc5f248c191539e2b17c176. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCHR1324578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c022d02255c1df2231a7a575e130dc7a908e466618104ffe6886ec562ae090. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QMDA61541295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51309548f903a5a307f45f5aeca2abbc2c0bc26106b95cef7e3cd6913041bbf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMDA61541296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea34b4fcc49153c2a96dee5cd52b6e20a021ca318ed646674cd4a32a3e2fb12a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US6R21388499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2be7f6fd33b12e3fce9cd2af37934ffd18340fa3b5fac86d01105ece077b16b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US6R21388500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1571aa2d74b4703920240dcc56675611d8e4d6a308f035c9cabba54988143f4d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US6R21388501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5afd0febad321f3b2d0b82d9c314d8c03c1520bae2114451efad6e89594051. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/US6R21388504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974f7155cf093773e91d2c58ada48174098337d80aa991ea531b5a8542744615. 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/IT0501600561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf50b7e55b0672830b6c07aefe25685a238cc7235f097dee01a0cb30f7a0bbb. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/IT0501600562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cd3eb3b98090231307f2bd46fe1383f38d4ae09633dd9a8a6cc05f42daae45. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/IT0501600563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b06114813a51a02f87436acc8315f67e812df2ae9406c9bd2f821ed46c1136. 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/IT0501600564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296831f65acdb2d56d8eb2a83b0202bb6b73632eeea8d794076304189d24fdaf. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/IT0501600565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c430c3f5bab7b830149016fd3698fd4a65ef643a1964a2f65c45503111130ab. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ITT742200319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb29f6f886719c69c491b6d86b74d876a9e333bc3628d6a2829d1c253b35dc9. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/ITT742200320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303b095558a9c03f6146b90452597e52d488e2ff8591be3cfd5dd17545e5b5c9. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/ITT742200321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a893660abf667980d58fae3f11dabdd815452e92122322c9693f19b7738ddf. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ITT742200322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec62ef9daf74791983b630c21cf8ecf86b4f5dff9c273e413d66297ba7c9d46. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ITT742200323.
Turisti della democrazia (Deluxe Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d0537627d128c12761c194b9a98bf7c19a00540a6a66886a3f11dc320ebcbc. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITT741300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d8a7153e0fd610af94b8bc34425223438bc438187b32521a35bfae2520c8ae. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM4TW1514176.