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 0x06009faf4fea52cea772049ca7987da7a9c05998363fb72d04dac7bd5164995d. 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/10bc8309-9c00-440b-beb3-8d4a101116cd.json and https://artists.proofprofile.net/proofs/artist/10bc8309-9c00-440b-beb3-8d4a101116cd.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 0xcfc839e3a60bd8593915d5d3abafea9f5aed3e871c1c3ea32d69c6c1bd1802af. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ATML11800066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c4bdadd27ff37e55657563476ab0d026285f8b0c846964a432e10b2ec43cc2. 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/ATML11800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a5ab15b4aab0552c7a5e781db60b04f95ad5557ba67425e8ee2e9dacd57864. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/ATML11800068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53599c02944359ea9239130c1e8850caff1c090018cde66e24d72fb73aa804bd. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/ATML11800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1633ad37194acb292c0e23a7f10c824a1b6833b475cf17c996242fb56c5b28a7. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ATML11800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed887faceea8df4e709dae27bbfdaf70cb76ee0acd8547aec04d22f9f363ce4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ATML11800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127311a88628118b01e46dc0a029ca7e9127841914d19590bcddc80c87fa1bc7. 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/ATML11800072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f1f4acde250277288b733b3da0e41e1a6bb1d19431280799b04a1f4d1e83a8. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/ATML11800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c27065cd1333321a2d552059ee1ffaa5a9e459e41a8ac917cb0ee00f87ac1c. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/ATML11800074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6c174fd3d714fa744ead010a801bed021de19431a878391a0823ca41d292bc. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ATML11800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d570e13f456d4eef723e1f68a545722ea4314208917c8b87aa57332acbba3c8. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/ATGH42200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6963d61ae3116097d0d4a04a868340c981df71ea4ce11ff37dac5fc2d9ae8e18. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/ATGH42400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87da87ed4492c3559b7c582eac83b1083fb5cd7fa85d669fd4e5c8167cb951cb. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ATGH42400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67ebd5e8da8660a78b19bee6d3c95ce73cf412043b7b8207114209da75a8d0c. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ATGH42400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c7bd2d5f8aa8c48e139031dd6085ae464f6898ceb58b044a76383903287fb9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATGH42300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c7bd2d5f8aa8c48e139031dd6085ae464f6898ceb58b044a76383903287fb9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ATGH42300015.