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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cb1ecc65d9518e12541b7acd7bbc8e27587f5a2dab27ee0079ce2010593a4c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/318e01b1-0dbf-43b3-9da2-38a084372510.json and https://artists.proofprofile.net/proofs/artist/318e01b1-0dbf-43b3-9da2-38a084372510.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dffa7825baccc7cedf3cd3f17ec84afb037fbf418f347095ced76839fd73a73. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/KRA351101722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5246814de1fcce81c3fa2add56854cb3b05a3e72d3b54cb61fbc70429d1ddfe0. 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/KRA351101723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcad5fc60f4d14da2bfcdcd5176f072821e98f43f9e970de9cb41506e1ad31c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/KRA351101727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd333be63ccbb2962953534a6691ad4aea2e280e74476fdb1df565ef04ecc740. 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/KRC302100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f9b1c6c549c94dd2087ff221f2ad8d1c5c2baaf6e3f88a2730de99ea21e7e1. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T07:36:28Z), 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/KRC302100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90dc577e605abc0140dde0be4f9e90b31489fd9c3f2f66f387c5a3487cb200a. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/KRC302100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f61691f7b52659483d0c91c2274eccc38181a7391bc15b46d816228316c2fe0. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/KRC302100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0a303be68fe9220cce788b839ba858f1af4e860f47a99e957da2bee49e38f8. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/KRC302100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f669545588c9a41f9533728bebc8c9f856215c84ccfa181ae54e818eff837ba. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UK6821400897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718520535cfa03254957f8574ef4345fcf3314a5812208a33ebc2352690ec6a8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/KSA002500512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e1e4baafd5a7ec6d5af534ac3c8019c66064637fed240bdeaaf992d0812589. 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/KSA002500668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897519a4cdd68b7b031a272d63a39c0864046aea118ac0494c49ceb91e743b12. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/KSA002500669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17b3cd8a1dd3754c28e828c496ff05feb970ebde007675c48f7acc9f434b996. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/KSA002500670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0b38f15ff824b055b0a5c912e0367aa9afdbbbcdf8689b12d785c151deebb6. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/KSA002500671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512c139ed53845ff5c543ce0a911a11de434ec0cf5020a4e55b310782ff72bce. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/KSA002500672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864f0fbc62c885db86f90a58d443dbaee346a7245f5bb946f3133eccc944eb79. 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/KSA002500673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f0961c177a63d01cc733dbc65ee7436b97ff45c648902a0a88e55ab544073f. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/KSA002500674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20a7cb9b917ff15058330b1eda174fa399a720d555347a01536d397ba6edb7f. 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/KSA002500675.