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 0x4aca5b4445d1a528a2976a2fec8fd9e605869cdc68d17775e4b532b77ea0a8ef. 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/a1df1b3b-9d6f-457b-bb01-4b35ddea7791.json and https://artists.proofprofile.net/proofs/artist/a1df1b3b-9d6f-457b-bb01-4b35ddea7791.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 0x2f9a37dfb44bf202e189c7bc2c3554d9ba652c0977881121ffbecd40a5d4ef74. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6N22080319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a8a4ed0d798fa65f5c2e306c5fc9999b75d180222dc44497c9d3089720e8af. 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/QM6N22080394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799d16896281b08e33f90648e3dfcdac54b538d4a0db3b3a43998e7d5e572ea6. 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/QM6N22080395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07117d695a072de8cd33c8d21cec81c8ad809c6ae9710bc9812c7b5887f31a31. 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/QM6N22080397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e9f487b46f72013997a1be2f2ff97da4a54f13b856d3296f0d88a3b9eb6289. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:25:31Z), 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/QM6N22080398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e32ddd826c2aefa2390eeae04331463c86448408b218e0e06fb8ac01ef43fac. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:20:05Z), 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/QM6N22089379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03d4315798aa2c7860344ab3da613f9bf448b5804f6207fefdefc1c756bf08c. 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/QM6N22089194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921c67ccd8c8a63e93bd3fd481d4838fe09f9231b967f7836f6e980c86f19a4a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:34:11Z), 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/QM6N22089139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f3b0edf14899a4d53eea45bea427818d8b9201b6e16916ebdf29b105891c43. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QM6N22088986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e5af484e8c9f719d466d5fb163e342d05d41ac8b8149a8774aeef7cbba4b1b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM6N22089159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52a69182d835a53f420844fa5e711503ac441cb22925f7366556463d207338a. 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/QM6N22089166.