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 0x7fcc1eb1a1d3c07c79545e5b3c7f2233efe376a765999d373833833ee4538d21. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f08a2568-5c7f-41f9-88de-db241396bfa1.json and https://artists.proofprofile.net/proofs/artist/f08a2568-5c7f-41f9-88de-db241396bfa1.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 0xd126f8d012904b8b0bdc3ea4f8fd4110c179726056e5adc33e517b2b9fefeae0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:43:35Z), 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/QZNJX2446160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f003a94aeff92d44112379bfa8069ca4f56aadb009e19585c7d68aa7dd9babe. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZNJX2446156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad95f0fca33df43c2aa8c183c693f8f7d7f3582047425b6a01bcfd8bf9e8f4a1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJX2446152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6ef7aaa7d5d957826fd2cf6f80acf87a4a78d3efb64595050049eff0b084e4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNJX2446241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d0af63099200ce0326571b58148bc4b2000fa0b96f3dc66e4018685b7001a7. 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/QZNJX2446234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705948398fe67993d3ace99e31e4daccbf50c4ca4fe8a575c296372e4494eda4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNJX2446215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded6405ed81fd05fc3fc4488af76265705ffdfbcbf99d115a32d3bf4ccfd90ff. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNJX2446213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2c16bc26ce1bd19252966074c4b9c03a617d5b092fcec5c9201d77282baf22. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:10Z), 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/QZNJX2446171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ad58798b8ca66624794bf2463c0016965bc8a34b856ea6ee21e476448fb194. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZNJX2446209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ac47f40ba003996457a7912a2e60715a73548e4d13a66c771261209bb040d8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:49:54Z), 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/QZNJX2446194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369387eb996ecde3d8c076283a92f67efe8f61c84c0c6f0f9748f32e20432651. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZNJX2446169.