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 0x4f211c1e17beab1af0f8470e01ff89ee7e144afd18726956cf507cffad32aa16. 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/688d9b16-a889-4814-8950-4b203a44b4ea.json and https://artists.proofprofile.net/proofs/artist/688d9b16-a889-4814-8950-4b203a44b4ea.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 0x91d89807c6f8f45caff682aadea4ad1be28cd6470916b49c6346b387a7651b34. 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/USA2P1944906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d3eff034daeffe6048b5afdbf89690c112efffdf03de72166f00185d01814b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ATR981225394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb45b5b50464effeec8b0bcc94e6f99de81aaedbc3b282f38aaca29fc30c92a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ATR981225395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29859050da6e9da4229a7d59b11e35c353e1e665dcc9ce5681b60a041cf96f5. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ATR981225396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491d68803c6362e8108d66557a12746b146bd03d741de5ad79f781fd4199942c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/ATR981225397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21708242b92a31c3eb99b2e1ecb4a3586ed1a5dceaf211cb5c5a7dc1de03fd53. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ATR981225398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d739f56338ebdfbc473849c99a1ee17c1aaae7c8ad5c639031a7311ee54ce1. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:34:07Z), 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/ATR981295104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe202ce126c8b505f263daa265a8abc8ae65648c701aba7367630c8f4822c390b. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:40:13Z), 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/ATR981303938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dba0176884788d9510fa4eb2aa040139434179dc6698c89c67f1ab8fad52eb4. 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/ATR981331467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cca7cf558d73378fee7b37c2d9b170f91e05d622fa41b9ebb4fb7e4649444fd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2P1952818.