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 0x6bc7ff855da1491b2412c3680b38afdff0ad8848d51485da1ebd68385f5c8ece. Chain 2 (Bitcoin): anchored in block 954015 (2026-06-16T22:55:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3488d4ba-2d8e-476c-aefd-73b8792d3361.json and https://artists.proofprofile.net/proofs/artist/3488d4ba-2d8e-476c-aefd-73b8792d3361.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 0xb8869fee891d9cd6f326c4ea2158f2bdc754a2f8a69663a4c4141346594fd71b. 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/QZTB62411388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee61833edcd68b797b8a06ef161a5e6798e28c395a5aabe7e5d36fc89a59479. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTB62411389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc5e88673588fc6e275c8b774fa51f06a0d59ac227cacb7fd592d67d252b302. 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/QZTB62411390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2db96672e4a7c24dca39956c469c76d4ebdec1f7ef759858335ac7bdaa2873d. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZTB62411391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b5d2a6ba90ad470739a44a8e3c714dae458882d0e793016df7e7a67d62f8b1. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZTB62411392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab837caa71f94a46c80da8bb074be211167dd42f81a5a66ed55faa290eeb1178. 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/QZTB62411393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3212ad8a02053fb284d741a0bbef129fe046ebe7450551da29b69c34364105. 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/QZTB62411394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c05e2b422e020f935b6c50cbedfdce27b704d9c6cffd11b04b0b6d0920a6e3. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZTB62411395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d5a8951d68591a752013e22a9fc9394021efb2952aab3fc736b1d1156cfe13. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZTB62411396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54cac2140482026a9f3ac4467dcac08bc0fa1195781096a940eab6ee06b8921. 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/QZTB62411397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fb209ace2a203b60033c65865d735d1d50b0407f2391e466a06c2de83ae235. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZTB62411398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f98b1a1d8b2dc1451815b350f85d682efd309473556829764be8690ff454aa. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZTB62411399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d6a8db1dd6b8775ee6cbc6c99eacf786a6c51e168b2dc1c0bbe7d4240a7396. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZTB62411400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cca72644fd3b1a5c93785f11f3417d613684a5933593c6b903a51ed6282f22. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZTB62411401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910c53be1111ee19313389a0b2eddbc37bd2fe0b2a4f6179bd43119f37be4ba6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZTB62411402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa1576851b1011a4a573771b599e7e78bade40cb9f7cc7472b23b36fa47688e. 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/QZTB62411403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc699aec2c9bc67be102333be3ab1042c5a39150b9c8185dd99473eeb4013097c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZTB62411404.