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 0xac622a292203716659fa24d1a3e72b2b55dced73e868dd4964e0b21259fc2ae4. 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/d64a3d67-ae54-4cf4-b6f9-f0d12f43bf94.json and https://artists.proofprofile.net/proofs/artist/d64a3d67-ae54-4cf4-b6f9-f0d12f43bf94.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Who the Hell Put the Muffins in the Freezer
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 0x1e0311e0264e793e3e518322f420abfbc62d54fca4e80721ce16edfad90645b0. 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/QZMEQ2035840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9422be4a398cc310040b3dfe7f6fb904931cb018f7833a46c10a903c089e36b0. 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/QZN882205808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b97df22c12d6ef00dc9f87c1c011711452c3eedd6cef8122b0073eb1eb92b5. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZMEP2288571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc095eddb26ec9c8e04fdaa9b513d3309a7d4f379c41d26a5718505414cb711. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR9Z62300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f15447d213699923d4ed815112385ef66b821b0dae29dbb8ac77828dc03c24. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NOPTR2417010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100f64096b7cd5b001141a2e48ee50116e440889ba4797baa99be411acb4e4c2. 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/NOPTR2418020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92b5d95b75245486a7da1efb0953b1b9a17ceddd324c8a863a5a043cc94f1f9. 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/NOPTR2418060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6fa2ceec74a0be7c1c8d733bf64b2e84de47e4e128197e845768640a3dc7d2. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/NOPTR2418030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46139c2ad1903766d54146d4a78f994344ccf0d5c1631460fa0d5ec69306ad9. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/NOPTR2418050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940099782e3435925278460973835a2345f007db422f842962a7e686542830b1. 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/NOPTR2418070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d8a44b986a359e693a541736a448c7bd7ca1e3910f8060208c4e166c645fe7. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/NOPTR2418080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefde05928bdac6cbb44ecc669889322084bf975e7bfa3721a6eb25b60f9a4a8. 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/NOPTR2418090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa2b86a72f458aec57cb1a5d87fc3387c055ddfbe28b65cedfd34e4129c741b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/NOPTR2418100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee7d4683da01f8d3cf7f36fd2c0ae7898e0cb1476bd706014783bbebfeb27c0. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/NOPTR2418110.