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 0xfe11301b730e8ce96af78f548f7cb4ef93079c8a7639987fe3d0034c732f7fc5. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97326dae-8c5e-4572-bf76-f5144c2a37a5.json and https://artists.proofprofile.net/proofs/artist/97326dae-8c5e-4572-bf76-f5144c2a37a5.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 0x6975ef25a7be3d5169264d14973901a7a4304543dfae62f1848e69715facd88d. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/GX5MY2211877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9741b401cb8f1a50574498667c21218b677f9b54cd68f49f944ef4c454d2f084. 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/GX5MY2211808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80710ab8b38b163de511812d9fae5a9c6d98881298c2b509261b6e26b10a272a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX5MY2211805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16b2ce76b530013fb546ec9831f4cdd62a1e6dad2193868c28e0f401d4bc8d5. 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/GX5MY2211807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8137a2a1114e6ac32ac6926c0788c29ab23152242686e6672dd90889b8b3c509. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:41:53Z), 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/GX5MY2211812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6a05afa86f670fdd422f1a82b3f4378bc2c01f45db3f797a46b4b21103e28a. 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/GX5MY2211815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc74b4abb8237a96065ca9dee85e17ddd9e72da7cf4a4a78085fccfa4008c10. 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/GX4R52338328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c38cd707c9d4ac6921e43d0a323894a2e0899c43deb48226f7447fbc79686cd. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GX4R52336442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4810af9750fd8292164da1fb3d56f246957cc5e96186a6174f0a2578ef50a1. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GX4R52307350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8d1449fea2554a8b25cbe90fe2eeb66d0301500b8fb3f4a460a6d0f210ee1c. 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/GX5MX2379934.