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 0x5824be066ab1b5afad8eb17fa9f4f036df2f8fe1f85a007d15c63bc7118e48f4. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8a55af8-fe7e-4e76-98df-a6aab023303c.json and https://artists.proofprofile.net/proofs/artist/e8a55af8-fe7e-4e76-98df-a6aab023303c.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 0x98712a40631d52390b71004d807f4ec3c3b567295d4f103daf0859e52a14557b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5AB2339525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864719f9f9ca5c6b48fb0abcb6ed6ed15b84170e402cd5f9a2afc81e62d87373. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5AB2339526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bfcbad73dc72cf2ad91c5fc407e2670ad7c1685451d33ef354440cb9ec5a17. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5AB2339527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d0fc29b77c1913bee14e6022e901b3be1aba871bbea31280977a72f792654d. 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/QZ5AB2339528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9decb9c253ed94d3851cb2af145ff40c6105b48f4f133b237f00c0d081f0cb9b. 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/QZ5AB2339529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3983c708cc99dd4b8bd999e5745674e279b238c6e99e9bc0a78034b30b062c3c. 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/QZ5AB2339530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935bb99de6f6031289460103396f8b1a999869223e098758412339fd060dd740. 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/US7VG2332750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc939ee467d7212eb440c6774eb3fbf64c6207c3be8f51b647686ba32a5e9002. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5AB2339531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d5d92994fef8412e609d13cee5cecc076c9c9b928d55a5d04284bd5f6df1c9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5AB2339532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4169c05e0663e8afc79e46b464a70156d8247b0313f856a42cf0271b287eee2b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5AB2339533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1325812e2e24e9515a3b9deb8ca892fde22907ca710090b2efe553872fa5b5fe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5AB2339534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45620d00fca6d708adb441bd0c165cbc119eece99349e58d122abf073387683f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZ5AB2339535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec00a0df8911083bc1bbadc281ef2facc78be5a677624966ae83586eccf78039. 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/QZ5AB2339536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86a7543e5d2d3a6cf6d5cc30eb971ced86eef973618dd860b489d03ee7f9519. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZ5AB2339537.