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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e57d91bedba48b5f11f0c4c457d77dc27216e8aac0d824b33d2c6b90a57caab. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8219ca3-e3fd-498a-8959-75fe8cbdd844.json and https://artists.proofprofile.net/proofs/artist/e8219ca3-e3fd-498a-8959-75fe8cbdd844.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed495156dc724887d1275220a8e15680f42bf70f14e95573767c91495f1b1403. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ESA011510256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba36a09b3771be09e271cbbd0905774707b14f887e568a025cde3b8ef1f316e. 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/ESA011627854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb39fb562deb82c1d4a877930edb2b0579480b51a855c37c0d3ba27e9a5b7e0. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USHM21864269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e6c3d54ed5b39944ae9bdd481d16884415a0a93b87e0fed71589f2e3a6af60. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:02:21Z), 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/USCGH1923240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b9cca01dbd753042dab4db0fa813934ca633606008d6ef965cd3741bef0d40. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/USCGH1923241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3cc8c5344c1c7d1c4ca9c048051ad555970fd5cd4ddedb440ae0ac7639cd6a. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USCGH1923243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207f3cb1c5832ccd6616fd3365df7576c3b903d035fadf8a1e5b28283a799c44. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:39:14Z), 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/USCGH1923244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd6637fdc57cbd9e96b465ae8222f1fa88ea535b767cc1a2175e9ac354ef30e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TW2199602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3906856e6a669056f78f22f9aac74091b80ae41f19a1ce07ec8e39a3c2be7a89. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QM4TX2264214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44afc1d0acb2f7e8971c42474be80fdbb46848337c011af3357d390d833480fc. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QM6P42224493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676a07b1f90b0e170b50a228e98a244407946dc57aeb3cf64d51c1dc36c42b89. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QM6P42224494.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a242aee4b6f786fcba164673a58e4fd98bb3b713fe8cc847b30f8c16cb8da6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM7282394679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793242e78f30cbfab176711a971753153df5852e50cb59786535099bb0ac8587. 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/QMFME2307602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde192260cc3f0534296cbcf3bd645cd451446d60aeb0037ec7de20b1aa07e408. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMFMF2354377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3e61ca900fb369ce90cf50350702e418ea3af5aa786ca13e73a0d95b9478b0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMFMF2354380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9449502006a1329b9615984e26cb49f734a18b0cde9f34da02cac092f023f802. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QMFME2372767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106fe86099a6cf1c33a85fa50ca22e03726556c5f6c0de7bb2d6987d1da6ae52. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QMFMF2541361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3158726734412d051a711a5f1ecd2d9a55baedc2a44903c27f388051d617478. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:22:41Z), 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/BK4DA2413353.