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 0x88bb77f05bee27046bfa2e0be60e4bed15275d6e8a70a5abc42d7cf70fbd0373. 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/da0138e2-91ae-4659-9a08-4074876f648b.json and https://artists.proofprofile.net/proofs/artist/da0138e2-91ae-4659-9a08-4074876f648b.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 0x1f482b5a75e1c27f55cb2b4262d1f3dba325308bd0abe691be3bee810a837da0. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZFZ62479232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f07e8c78655101beab1d552713bbfb39610d4ede005c89e4e2fa5db66ebe32c. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:56:07Z), 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/QZFZ62477323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cb7d1eb93d1632b66171fb06b385cb88a8af1e61a50269e436d2b04ce26a55. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6H2416236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9738f1cfcfb7e49567cbe1545256e31099b122a5a78e6e03e1f2701fd12958. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPLS2450602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76887d761b627a8ab4844a45f4738470ab5b14b8c3398d4dcf5c1ac078b0267f. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:04:59Z), 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/QZPLS2450603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093f2a74edaca05d80f4b6536deaa88906262efa86ccaac1cddd3703ee50be5a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:32:18Z), 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/QZPLS2450604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd06d7a85ca2751f2394e171171e770009d5e6717646a797866ee2f71b8bdad. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:37Z), 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/QZZ7X2459680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a40320732e5becc7f0584cc582877629868ad0c3b88a1dc16be5a8eb044499. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZGLM2507254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76a2f4299e64f4715e3ce18b5fd4f27c2a182ce5dcbf038f6d99b1c468a2589. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZGLM2507246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec96599079d6f8f746756afb7ec004be1dce1d9cf4bdb811393d44bdc2a74381. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZGLS2552402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e444bfce965eb6f33b5449cc9bb07f5119328abc7d6af521df68629f65dcdf2. 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/QZTBA2515044.