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 0x0bb3cfd333a64a6777751712baa3b470c816747bd26212a3939096a3827ae0c4. 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/2bec3fb8-8d93-4e72-a7d5-24befa2e1732.json and https://artists.proofprofile.net/proofs/artist/2bec3fb8-8d93-4e72-a7d5-24befa2e1732.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 0x3fe14fe91f2c670aa83ed965eeaa3ce5bf5947ab9fa5c348ff2d08acb8419b89. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZ5FN1764802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f0f5880e775ae09f0aa98a056b4820a3804a547a31f82cb595afc20f2009a3. 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/US83Z1934857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd08d24dbba6f2fce9105a39fd63c9f2b672924ace247ac935406e61ecb67d4. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/FR59R2017868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981f4352db73c7b0005c271f609fe946e1997c1b9f5f9a70fc42403de4b3a495. 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/US83Z2136269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0a717a2d27615fde7ba61d3b4d97e792c55789e17db4ef71369f3e6560090f. 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/ITYEB2300435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fddf291a428153fc96d0309df7ce12bd8353aac1e94f31eb41afcbe7b2ad73d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ITYEB2300536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8de70ee8b44a37a0ed4743c62ce769438f11311f7eea6bcff5faf8871cefa51. 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/ITYEB2300538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdde8dcc89aa831df929e6c5c8947333724b93cbcecd5df75fd23c9c213a344a. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/US83Z2472330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727bed6d9c7b34b4f01a51d329f1847a57c39ec52cfbdbaff30c559c6a2ffb3b. 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/ITYEB2400673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f216e513cecbb9de20718bb40a4d53325cf87e5e8eba39e18a255781bfe3348. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US83Z2498202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d3017553721205240575877ec97f19794ee33e553afca0147d2968260d120b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US83Z2505066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd9d09887f8ab56b8d27c61f8d1d8754a6fd03954dda14182a2e7a2dcdf04c5. 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/US83Z2552726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb307a3cfcdf5e7fdc0324066cc03b13c55bdc2e7e4a3f452450ef5749af10a86. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USLZJ1664206.
Peppe Citarella Essential "AfroLatinHouse" 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f12ccd0ee9e33249a4e43ffd044bb858bbcb8c2771b2bb1de5a05976d1baa8. 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/ITLCJ2100347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03389de83caf728b4839a3099b50686a88665df57de8f29facbd4b1837b8d06c. 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/ITSV22400049.