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 0x5a07a78edf1c4ad4730d6eba6b343c60d6b9f5047a2cf50f91df30f740a5152f. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8df8de6b-e30b-4aa1-a3e8-c9866f0448d8.json and https://artists.proofprofile.net/proofs/artist/8df8de6b-e30b-4aa1-a3e8-c9866f0448d8.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 0x0bdec94894842d5dc5e48b9d4ce329389cb6e1f00c2d0549975fc08720da0392. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/AREA12200524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09251e8b5c1bbdc3d5093faee42edb762581b355b27751721e7d6fb646c76195. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:01:27Z), 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/AREA12200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3530ec5410301be647afba8e7d88c8c27b71b2d65a6805d45723c0038895068. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/AREA12200646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9787efbdd034c3b674d6d0878706798b7b5daf324636371722a5ef2ceb6ee4a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/AREA12200648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b356b7631c24e818645b4ea1d2f50a4407a31902aa1bf2fbe39b56574960e6. 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/AREA12200651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9395654e5cf1d00cdf27dc732bc264fd7536101d4dab52dbf2c7da1e5292cab0. 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/AREA12200652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31b8afd722e7fdf05c26e2d9fe8a1cfea71248969d04457f3e640f7fcc9e97c. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/AREA12300770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8562c52b2d2440682ce12d9a5dd4cec771ff34e3d81a323a7c0094a4e89a0d2. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:24:26Z), 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/AREA12401003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c9298c3d14c6c493565c9f3aaee6debe62913ef828b000b540b4fb01741337. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AREA12401004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0074a541c1ded3a087f7252fdcb2f8731e11fd99fa71ce69871d2362f0ab28. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/AREA12401005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3ddc5fc27ac255b9b679e220a64d2c36fa62a6a5c369eb8f11486c061a16d0. 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/AREA12401006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe96dfe891057d18635a6b73152a07a570b876a89277ffa9c0285beef340968b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:31:31Z), 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/AREA12401007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0923904f1bc0c36bd90296444e044235759802376b576d764c9598d74cac0c7f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/AREA12401008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad72fdecfe53e58633342b69f0ca208f9a92566686c65ae7c7f6c218202a797. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AREA12401082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb073244d98f710d4f165e7df1971a28f33939eaef39d2dc31147f8afeb37ae6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AREA12501385.