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 0xf38a52644d443a17eb03f57e54ef29632d5ddd01024ea2f1e58ee5632a21b73e. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93b0cbf5-78f6-48ec-a6fb-54829eaf370d.json and https://artists.proofprofile.net/proofs/artist/93b0cbf5-78f6-48ec-a6fb-54829eaf370d.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 0x395916479a7f887c1f966599eb8f16edd8323753575d96e566e61cd58f657a2e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZL382584531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4df4edd67bdcdff0a568dc423fb77ef4957024e4cfeb07f2834ae3b140a0a66. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZL382584532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d3da789ad3f5a1ae9cf3ff0162831c076cc36cdc360734ab8fdb4acd9c0682. 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/QZL382584533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0535a70de31932ecb2c45dbb6f9f650af01cd20fb42f675ad18718e310141c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZL382584534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b3609c3b1cfe66995f9d6d52e079fd97590137d5ae8c59c313f75edd41ed0e. 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/QZL382584539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9681a02c8c46af498cd47d7b6344db7c57c97f133db36afc159a588c5aa10378. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZMEV2559819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fefeb048cc447f1c6bb531234e229a553f8a13d31a2d7f16293a2f17b5c2ad. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:17:49Z), 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/QZMWW2599555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dae2523b2a7d517919d4321f6d7237d9c9ec1f2d681a15a858ed129a313bc69. 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/QZMWW2598395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10aafd8a881508cbc52d2460da8fa42d79ab76e96dfa918bd1756b4db3f97978. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNMU2553574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bb27147dad8ed2bef77dbc003a80ef965bcbc01b3431d352581871a899759e. 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/QZNMV2550829.