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 0xe93cf46ebdd7a74e0560d9821e2f3eea3f1a34b07a77203387e7897a90283bfd. 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/4fdbcf47-c9f0-4b26-abbb-f9f3b2837062.json and https://artists.proofprofile.net/proofs/artist/4fdbcf47-c9f0-4b26-abbb-f9f3b2837062.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 0x271e7602cae164e4c43fbe692731f47aca9cad27c016cba8bc0f5ec0cf2cf9b3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:25:02Z), 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/QZEQU2037351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9372cb563d4a2d1920c21f46056c11a2ac51e7d72f41d064cf4446277d78f9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZEQU2046128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ff8e1af456ee4a33aa4b1059f88ac6a2e665dcab50c5d242ad5dd30eed600e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZEQU2133460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87c153af453d17468ad7a0e7285ebab7ff0d3156f9eef4011c98760b9a59ad9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZEQU2143325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7ef265cc56e1d493b1d6f847c552cb9a1e17e8188696a19d14f3b7531ad54b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:46:56Z), 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/QZEQU2251124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37253214f54356c0627b5eecd819d950054cd5b4fa0a3f54b94f37eca178b83. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:03Z), 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/QZEQU2251125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8091a3091eddf125613d99b45092424fdcf81a9c777091a3de9bcd39636e3ca3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZEQU2251130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc311bad6c847adf6c0f9e7da99f7f367017c7b46d2ac7596da83e87fdd31fe8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZEQU2251132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5943091d6616ba7fbffda2bbe79424ff070a2d249c65fa11e2150d499ca4ffdb. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:55:53Z), 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/ES35F2300641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74db94942438de329ae5d85d6d9d76c890ab787afbc83a7700d3217ffaa1afb4. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:34:15Z), 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/ES35F2300647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ce86e6735049328796b3884bb4955bbb0d802d759f5f039888ea8dbf99b4f7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ES35F2401118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31de0a3d5038cdf6891296416b736482eaedc30247d347c0ab4ba207ce5eac2d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ES35F2401119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339857579a71d5beea964062289db3ba11b004ef5c765adc3cc37f781cd53369. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:08:36Z), 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/ES35F2401120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe086f14cd063924ea377f46e272b61f6d4955832b9a0859c681cd46ef876ee1. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:18:14Z), 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/ES35F2401129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e952f44732f1283c8b9c22479b7a6c6725f882082218938122fa775dbc39c2. 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/ES35F2401626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecea930e030edc29bdc1774c5d2fd6b2b4683687787dba428874dea948d44049. 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/ES35F2401627.