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 0x7d0ad038f92f24d90be1bce5ed9d3d3e63e093f571fd20897f36d2b93e96bbbd. 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/8b227217-d8f5-4616-af30-566704e1e758.json and https://artists.proofprofile.net/proofs/artist/8b227217-d8f5-4616-af30-566704e1e758.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 0x53bc996ca2c5d3a709b1128eb22c73e728f79e256f184dac49625363c0e066bd. 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/GBLV61722209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881b6b78ef943edb45494efd0e4141810d1b0c7cdac4d9830c9dc8ad40b96d6e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBKQU1934291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce62cd3daa353997aeab9b931bcf889a22b97bde0a60a153e253ea47478cf47d. 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/GBKQU2034794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ce6ea83ee5b90a7f71a154f63babbb024c35281c87a9089a83c1d19c3ec09b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/GBKQU2048692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b3e00a02c278238eeb1a744573321737aee1cc924cd8d86d72175bfb65832e. 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/GBLV62008517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409818dca6b7beabe5ba5edb77830d08d133984014ba9f8155c200b59fa14950. 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/GBLV62035965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa03d4314257c9e37c04633c2b3ebe4fa91fe8d87793ed4a977d9e56fd2b21f5. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:50:03Z), 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/GBLV62137774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad9724fd396012cf519b8def15cfb694159aeab7c92c7fbba9eb9f2b0f11f7b. 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/GBLV62216137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f76e7f38917331374753bfbaceb2b321119affb569d9b8b12866b14cf6fd36. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBLV62418017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee18f17166e6583af33d6b75c23183506f061133fb5be225e495c65bc00edcd9. 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/GBKQU2523834.