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 0xf4744d2f3046d09f40eb6dddc78563689fee0a81b2ed8ed7c4b940dfa53c747e. 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/05be209c-9dbc-435a-85d1-66e01d8256fa.json and https://artists.proofprofile.net/proofs/artist/05be209c-9dbc-435a-85d1-66e01d8256fa.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 0x02b5324390deb13336444f9a7553aaee29d5433e5cda591657e76af5d82a0510. 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/FR10S1845613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e61c11c464e9f4f6fb86233d6e3559aff9c6c77aa70bdb9a4edbdc177d1ce9. 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/FRX201822470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e7bfb33cfa8ebc00c09f990f17adb5123cb78c7b2efb937be6d4f3f6ba52a2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR10S1984475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26395774d5315abb418a55e0bfb89082c948ff77d7e6728cf42582a83d088c1e. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/RUB422201217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2e5d868b0c6f846fb59e5f7b2cab70e1cf90d42158ced5e105a290be134efc. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/SMRUS0075019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd388e8a20a592e8763ab1ecdf254be79a7da5cb697f027f9803550cd37323ebe. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/SMRUS0075125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527254bceb50c80a24f486e6fccc22d85befde529585589ba59c65fb5c9f05d7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUA1D2421613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d18120542bee643eb21cd3f808e4dc585563417e48e29980aadcbabc86608bc. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/RUA1D2459274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08bd0acebaf365312a4157a33f04c904f21447bfa8f65b9b15eebb567b1691f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:55:20Z), 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/RUA1D2497260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f41f57802cc1eddf6a98b2c17d64e4de7a8bf7bcaa22c20de0a13b43e0ebb4. 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/RUAGT2451463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb081a9c2292145157c9cf55ae8265e74d3f8359c03547ce9f49f346a50436c91. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:37:43Z), 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/RUA1D2558656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5de5e50b661f5d308cd39b41360c130121d12170ddc0428fff541d2c484d6d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/RUA1D2558657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02266379da147f8cf8aa5f70f283745b32370e6af334c0db0c95fbbcef4ecbd. 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/RUAGT2571801.