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 0x6b1cd7a64daaf1fb8d0e33f001ecaaac44ef6963484a347162176f828c9ca875. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42f7a10b-a110-44a7-aa7a-efda2fe4e2c9.json and https://artists.proofprofile.net/proofs/artist/42f7a10b-a110-44a7-aa7a-efda2fe4e2c9.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 0xbf7d76ee03707bc44fa976ede5560beac05db8706fcf96ddbd363408b36948d6. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:34:36Z), 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/QZK6N2523749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa82081c5d62cbc01409969f57641e1b429040814c286d0e9ed5aede3810607. 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/QZK6F2557631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba23f4bbd7352d89d469bf8113359fca80fb0e92460c62c925226151a1d61d9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNWT2562172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c940e4585c9fcc6738a93689e10cda137287d85a0e288ca2c2b79b55276b6f. 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/QZNWV2537377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cfb7e6b27c5f85b8eb166970cb9934ddcbb53900ac3b09e40caac8dfb30fb0. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZNWX2564140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a003317ac4d34207231cc548f1aecd8a24e0c3e0c00e66a75dd4fd9beb33618. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:17Z), 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/QZNWY2510491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403b4fea80b0951fb1dbc53ddaba5d3bea2e5a954cae36636ff81a510b163d9c. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:12:08Z), 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/QZNWY2575229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43084df38df76796ad8f8dfabeed58f3298089fdcf69a1749504095925ff875c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:45:41Z), 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/QZNWZ2573833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f96cec3d226c898efe949956c1be1f0e4354a7f3a8585d5f9a9939ed48b13ba. 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/QZNWZ2573831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdb8432d8eee4149a53099b5586316d1ec847d9c83628fda0dab238a1b218ee. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:20:45Z), 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/QZNWZ2596976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc065628270d2025cdaab4010d102869fff4c22526804b805a9cbc310c84f1e06. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:52:51Z), 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/QZRP42549130.