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 0x1b2af476f54452157bbb16a3402878ff9931ab56c462b71d7d479f318ffc4dae. 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/0661e6c7-01a2-4cc6-b79c-415fa2e06ce8.json and https://artists.proofprofile.net/proofs/artist/0661e6c7-01a2-4cc6-b79c-415fa2e06ce8.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 0x7553badefb5213c0be445139a5280a6e733f85b236fbe8e5df8bab492a09c6ab. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES8801900178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e6279ea9fa9c2738d5225d644043b4d1a81ab38167366e157297bd37a08d7b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES8801900179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eff2614cfe417892018dd90a082b1123b7694b59724efb128449711f81055b4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:33:23Z), 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/ES8801900185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756166754d15386b42b0f43ca4c6546faef880949733e2261b35edad8f78e799. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ES8801900189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4a267c7963599daf1f734b0ffa2a299e5ef6d6001dc3d25865ce7bee167e83. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES8801900195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ac530d67b4ddac1cf370bec6e420affe20fef7a38aa919b860954e5ad15716. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES8802400479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881903e8601409044e4458e06f3b481b27be36a69cdb05418799a730e27a0a78. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES8802400480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93aced58d18d4d9bec9547ae5aafd7f8a5dfe83a3dee41486861d2a7bceaa1d. 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/ES8802400481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db446869e3e4501c6f208b049bccee9e2b0e0bc850d784585c7b40c0ae1e00a. 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/ES8802400482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b236ca7fb36e2847f467b5dc056125e0da761bfeb5b0ffbbe16922480307b8. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/ES8802400484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe9f526873b50e6253c022407dd09a81fb9972d11d20ceb5b1bc59b7f753ea6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:06:41Z), 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/ES8802400485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917f930a207c3e92628edeec8c3deb9bc4203ee14bc27d5683361375a46e0eab. 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/ES8802400486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7801098bd2dac964fba032ab6164796048fee72f57b7b55dc0a5f69860a69fda. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:56:07Z), 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/ES8802400488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e6c194b2aafaa21beec767c00170d470f18228335eff5044379083e101273d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES8802400489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958011fdc5f9e940c3aa7687980711b48b6e81ca509add1b6a5792339d3e268b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ES8802400490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5131c7619acfa8c6e4a3e05c09be90e9083f7a482e05085bd71cd42f115179. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:24:04Z), 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/ES8802400494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8458abc9d624a9609d31667b2f65723361bd666d26c7724218399184698b9ddb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES8802400495.