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 0x16343df1f226e990685d8debaf75d8c2cbe74d23048583dedb237d64c5f7ecde. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c28c3d4-2dbe-484e-996d-11b7862bd39b.json and https://artists.proofprofile.net/proofs/artist/2c28c3d4-2dbe-484e-996d-11b7862bd39b.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 0x2758066339cee5b5cf94fbabd169200a2035700d99daf9c73105a43d33756fee. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T22:58:38Z), 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/QZNWU2365238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d255cf1d5588baf1eea2e3b98c8944a7159f4f00bb6903f69e66c576706a56. 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/QZWV32476158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48f8126dc2930a45e70167a0058abe8f5ae7fffc0cc533171053f13f52adc19. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ8B2466384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ae3798770fb436e8712f3e109bbf14d73089ad1a379f1544d4bfc4b2e79f68. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZ5FN2595457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ddee59617eefcbc7e44191031a3fa47c4f57549ddc46db5a31b43e9147e5b2. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:31:51Z), 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/QZ5FN2595718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd31dc2039441bbaef6a0a481024db8d3081d136fb7dfcad9ade0fcfd010d28b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZ5FN2595595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44171334924adb6cbbf28755bdedd63a724245cbdf6dc8deaf4c11f0c174c90. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTV32553759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231dcea7cf816e1e9a75ef55025a7ed1e788b903936ee887257e452378c00171. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7R2575027.