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 0x6efb223260909edbe13dd08aafab0413fd3dcbb9c1e40f27ed7458cdf8523454. 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/cef7a5cf-bc48-44ba-b448-90cdd718e7a6.json and https://artists.proofprofile.net/proofs/artist/cef7a5cf-bc48-44ba-b448-90cdd718e7a6.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 0xb022ebfe5de1396ba69d47a1903c8ee9de05cfa70feb1288e0764ba11608112a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:03:34Z), 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/GBNR51800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5e6fbe17d9595ef3f87d2ab6d934be725510027a1b394660a87ca639ca1f77. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GBNR51800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836bcb4f8308e64dd61c7b711f216b71a9f550b8b54d29041f2d96d5d0ad38b9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:43:56Z), 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/GBNR52100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836bcb4f8308e64dd61c7b711f216b71a9f550b8b54d29041f2d96d5d0ad38b9. 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/GBNR52100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7248d0e2de9f7e4b4df1d26e4a09465a0f3ee69a372ae63baba87115bd5d861. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:36:26Z), 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/GBNR52200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71750ea6ac39dc51ddd66c225fce6d82fbf6caa1f9d94153d46bfba21e206138. 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/GBNR52300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444edf451013bfb64d68173e1e9c3358dc84a97d82a14f9c47faed01d1ee4321. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBNR52500001.