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 0x176fd3b4a8cefcf700448c01d3056064399e5ed2d4a32c2f0a88787862a227e3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/870e46c3-403c-441b-ade0-001cae9c0b63.json and https://artists.proofprofile.net/proofs/artist/870e46c3-403c-441b-ade0-001cae9c0b63.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 0xf3734c5afa33108ad6af7c5e8497feb9a0f83af6218f52560fa91325cf42ac97. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNB2211866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17791da122a0189e17da9e317d712356adffcf73f3df69a3ee4fae6a97cccdb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJW2291299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda9f6c5746d0a4558c594c7b5b1768dd62deec87198a2ca5f07d4b2572eea22. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AR5UH2301295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca6e5877d3a6691f9dfb0ca02a9e32074af5f195f1a3b43821739f40cad362a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AR5UH2301362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92da9881f1437f5d6a7dce152e9b89aab1310d8def096fb90e7aec8a9d291ba8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:19:13Z), 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/AR5UH2301610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ec9920777809162870345feabfd336b3482d1da22e1c8e2045786701a9c2b4. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/AR5UH2301886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5631cb5a1886138f5638116fea21d703cf6ee6a4c12da00cef06d29da73bda00. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AR5UH2302064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ebf6841ef86fd408f9956b126d86172bb461603f0d854180da7ad180d14695. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/ARQIH2301803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f1a51c0500aa8e552b78285227372de5e2ea061bbea9298a16159fb672d148. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/AR5UH2401100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55ce6ef657495656d28f41fd14c84e84b616f1e65e2d962a560921f32123be6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/AR5UH2401574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f613b6d49d9390140b8dc36d437245da0bebc49c41549fc63d1669a8d171a5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/AR5UH2503683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53288babf3cbf5abfba4e96ade3e0236dc50f6868f45a4044df08c52e921e45. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZW9L2393658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44563268949b1d4cc40fe7c3078e322eeed2ee647577728bfa3f03465c688653. 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/BK4DA2456359.