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 0x5067f4bbc546fdbda423e01ffe87294f6980d086e5da25e8b8d422e9d86f932c. 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/62bf1579-b5bb-4b89-8ba7-4ef484936286.json and https://artists.proofprofile.net/proofs/artist/62bf1579-b5bb-4b89-8ba7-4ef484936286.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 0x0ccbcab04230507b17b5e45ef5603daf0c81b1279f4ca144fcd957eb1390edfd. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZHN62289872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883262c5fabe20350e66c98cb1b9710223f0d9a5a79c02f649e93a67f9b080e9. 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/QZK6M2210004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd465ab41270cc99e2ae6086c3b65ca63c15e692d2571debbc7aac70b9dbeb0c. 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/QZMER2283180.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15e6be9a90ae3ed030f7abf92a17168013378f56ec19597f25a56f44c428cbc. 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/QZPLR2225949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13854a720f198fc95b56eb1acdcdc9a3d8e0714328a9f1221a3ac788d1972fd. 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/QZRP52241467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc644f9fb9ce70f1c31b54941c28b98a17bdbd2f06b21b353a6d0f862f4349114. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZRP52241469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf576be98bcb6ff694a0d085193c8158eee8dca6c8e1338ee10da15cada871c56. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZRP52241470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec66c9acb7d70754aca8ae25faa8a6160970c8cd990ac3266f899a4488ce3c29. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNB2399600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361b8653b77a6620c776fc79e28801a30ff5c8b7d5bcb170937bdb8f9a20b491. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZHN92378848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037e476e5e0bfd994252559b766208e1382a1c75075293a43ef4344d8311c5b8. 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/QZNWV2361891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1368719f02f6ef85c92e7d47292657d8975ef659d35fcb6b713bd772b72f31. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZTB92309037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1f100f7d7a05068173438d8edb06339948beb55406c15a54fb3d4c47e9c148. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZWFE2345524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4de77c11b49f78a63f65bb2c38d594440dd2b56d3266e76cbd0ba9cef229b8. 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/UKZGC2402175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e827b7c7f11def34718a9229a9298aa0c819ad4b64dc6bb752bee62cdcec08. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/UKZGC2402532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390c7d9f147371e5808abd6b28b6749b81d20bf9a6110ab99b502b8dfc66c547. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/UKZGC2405089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bc1c32e44badb0ec4ddb36f95d5c11becab686d71ba863a4e4feb4e499bb68. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKZGC2409163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa853e8e85a0ac8a6f126f50af3bb4213f70c62bb579929f9d4f21bedb4e3afac. 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/UKZGC2409658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7f43a20507a1adcaacd002d3b7bf03750c489b118c66c55cc76e7393e82a48. 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/UKZGC2411305.