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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 0x78a54403985ea94de6579e8192abfecc4dc88ce927a33ebab4fb782fb32d8ff5. 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/c639e6bb-82ea-4dd8-86a7-517dbd268517.json and https://artists.proofprofile.net/proofs/artist/c639e6bb-82ea-4dd8-86a7-517dbd268517.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 0x993748732551e2979fee423d8bae432984b92b64a858813b5607f38497a734f2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZWDD2306246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00b4bea317e7f13f027b50a13ab50330f499f8753e5054c194589b6697eb264. 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/GBWUL2380802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55199987797fb248f024cb1dbd9edf245cdc0efab106c1e5883dcaa8ca427770. 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/GBRKQ2336647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975b3d8098373ba1cb776fb9f114623cdcb6f0d575523840baa9efa09c8c4e98. 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/GBRKQ2337510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a9499fed69f9e241fbe3438171fa852aa399fac3cbbcb5139a2aaf351b2056. 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/GBRKQ2336626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d90d3940e9673636933995766362cd3b7605b7914d739a6af3bf2cbcac34632. 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/GBWUL2275394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5fb19f70e088ef11310cd48bd80635f097caf38d5960aed3a243220dc76855. 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/GBRKQ2249102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb12b01aa5b2a8c0ee83a8a5e50944d3072dfbf3d276993d244542f05259ff2c. 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/QZNJV2187781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74568c7a4156e63f5122146dbd3e15f57ae08966aff0209ee75746ce0948af78. 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/QZNJV2146468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e243be4c252ffeea411184b84ed0da27959a9c76c486c290ec90ef5bb5ed20. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QZHZ62115606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5473f85dad0660bfca4597d10f605d5a55c5f102fda15a3e8d4b70c5acfc9c. 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/QZGLS2170244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0d21186f669d10af47edb6ad0395fb39d71da75d681215e034f0e769748bd4. 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/QZ5AB2125923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214316251490bc7d65b8471efb5c94f7aeae9f6382fdddbe87980abe4aabbd7a. 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/QZNJV2022724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d128020f1075dd433223aa7dbea4ca758828f7e9c66c6a06a39148b3e39668f. 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/QZMZ92077470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929a90ab26875bf1af49a353dfb64410f07f31f131cb4607d4510ef747d7e100. 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/QZHZ42032029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe890e3c4d606b2905af9723e85e082e8d6a8c95df436232b489dc98672b025f1. 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/QZHZ31947222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b4fe19bce68c57fde31bac814d1d13f774b76d71b7d11a6017328f22787e18. 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/US7VG1991661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf7a39878110e75ba10819f847a093036bdb2cb56ac3728c8846907702f0b6c. 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/QZGLM1924842.