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 0x330b1c8d6e4d9fae41d6e20a0d74dbb5c5550d309dfae3bfc6aa1ddac1f86e30. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3423461-8559-40e6-ac4f-68d9018a66e9.json and https://artists.proofprofile.net/proofs/artist/f3423461-8559-40e6-ac4f-68d9018a66e9.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 0x505c8a4d10510eb8dd55858cf86c8fdda4d5ba423e3c4060c6dde79c303dddc5. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USHM81499094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f03ec5dbbd9d7904b344b94e1ccbeaf772562c8123ddcfe4c2f41c7e95dc0db. 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/USHM81499095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6311adf3dbb649931f66945b61e93c5ba006676b72d13741fdf5027fcec8fcb. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/USHM81499097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1074a9d25f90171a45a63a776c0a0e7a177353cbaa0998868e730d27298811c3. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USHM81499098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb56166a6f1ac77332a2361d1454705530414c7d9ffd08add47f987eb7d576d. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:32:37Z), 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/USHM81499101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bbb4eedd464a04ba1c03ab32bad63aa183c3cfe30bf22e09e3955e252586ff. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USHM81499103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6704e7eaba44e7e45dfb22094ef33a0bb0ad641b0e38e6c6abd4fa0d0946a81b. 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/USCGH1637503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae6570d0b1d2ce9788f6c8b097ca0150e0c616e722d681c6cc0535289bf1a62. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/DEZ431836903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003b87c7719d398121d7f906ecf410217251355c7f8c6c9272e2f7a6e847af2f. 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/UKKNZ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2f20da5abc81e373882626b98d726bc73e73fddccc41181b3feff50b9a1fb0. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/UKKNZ2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35389e8bf146250d90ff33138c3378c3d45466f36b32c7330a8efdf61420f0d3. 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/UKKNZ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbc215233c708b62251ee2af9446038c847652c46c527ed6e82414c7841560c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKKNZ2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80c36c8b30e4b0aeb74530e144bb8e5c4d467c95c16f77514e6e1ecd2773524. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/UKKNZ2300006.