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 0xa8d7a6a8d1f6559388d08b8b320b040efea8ba70edef03c9faa7d8b9a53c926c. Chain 2 (Bitcoin): anchored in block 953670 (2026-06-14T18:07:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59b14a9d-48ae-4ad0-af99-6ab20749711c.json and https://artists.proofprofile.net/proofs/artist/59b14a9d-48ae-4ad0-af99-6ab20749711c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x8b8c87d7d94b318150c298ddbe326e674a8903d9543afb36ef5acfd6d75a2ff1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM7281589368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d53ac5ddddb034e6e4275665af2886bd03cfd23291824fd216c6463a6b8f5bc. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM7281589370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c10dee7eacc7f07eb39d9f20ace8d21586ae99ddd408825123168848faa10d. 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/QM7281589373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fe36fe90b649fb9d83e5a1f810a1ca626897afb6fd8ccfc50a0241f6f494e4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281589375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f65368b540a905ac2329843ebd4f56ab67c3a1627e5e4bd8c2b4502cb97203c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM7281589378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc93dd31efd9d5642102c58315ca9a92086176ce788da86a0be5eed0689d831. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281589381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d82001be77fa2725fb732791ecfab8d5e7fa654638a0307c98228d45484f3bd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM7281589384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353ccbf5b63cb45f288bf54bd3041645f8195108342f627c864c799f5f2ef409. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM7281589390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53563eb88c16b4df1c00f5caeca1de84726785c5654efad35381ceeca30db66. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QM7281589391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11403272d1bc16ba51e6ec5a1f85b3e5b57fc632144f514f5d4a43f1fc0768a. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QM7281589392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce78cf7e805fe282359075940bd086913677a9690f952c95edfcf4eeedf6088b. 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/QM7281589399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6cc3be59c35c3210f06149e8abede042de04db206cf67a17640efbf966be34. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM7281589400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe30dc2f82440d2c120920ddfee00826b45f755f4ba58c300fb6152284b7a17a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281589401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bbcf6cf9383aa9aeb348f0fd69527e0ba871f9ce4d5fc3bdaabf51440dce23. 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/QM7281589405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad0ede51f4c2719e010966119526a29537259d1299d832ca63cb82795e46b33. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM7281589406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7c878874a2ed4418563e4fc9229aaf0f605313bdb2493f10c5594b16a41443. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM7281589407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6112283bf74c76baa9603fae8f3e406826512c2e4d15fcea317030b2ec2005f5. 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/QM7281589409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45beed0e172742f0fc87608361f58ed2e989926af0a883f148664c3ea7a6d5f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM7281589411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b13f3c572b216fdfc342ef7493ee639297a8827adf661f5f4ba16a08fd18ce4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM7281589413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e5f1efd28cf5c2da975f0db53e2e1da09043d652a4db5da5e1c110d7561f6a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM7281589416.