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 0x9fdcf08e28e5024a9a09f02e676641af590d2fa1054886a41db737bcf5f5acc8. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b3ef296-41a4-4ea7-99a4-7ce9a6edfea9.json and https://artists.proofprofile.net/proofs/artist/6b3ef296-41a4-4ea7-99a4-7ce9a6edfea9.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 0xcb1c62017e6baaf3453fb5e1d8fafddc2f2118534f5b8c1a34224465d8dbff8b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DEE021801890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa22176c7c4a656349aec7ddb1ed773b49c9cca2fbc98c97e644a5182ec000c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEE021802040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a8cfb26e34438748c792f527e18d7c2baa2f719134fc950080b252b28b5440. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/DEE022000500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069ff3319d6dc34ea02ebc908ef74311747dde1afe9f090585c4018a1f3f5b40. 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/DETC51600248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96daff084b929d850423f384aac0a7a40967823758c8bb6d6c18b02fd230816. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DETC51600249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f6798a67432a2682593e4bd12441d739d2ca50cc4b89851644fe408b6c422a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DETC51600250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43b07c4c1deb870cfb41dd24917d070e1b34d23feb32bf8b69d474cc2444562. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DETC51600251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0703c731bb8b2a26e7abacf0867007cf1286ec76c27834d3a4b9dde1003c73. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DETC51600253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185d430bd20634be35417ffe3f1a8648feddbc5846efb34129c264031f50e505. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:55:34Z), 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/DETC51600285.