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 0xc36741905901b7b0ec4f088d1e2c3b947e0b19b7bac7ecfa156f5f3d7b81621e. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcf19526-f9b7-487f-9f8d-1e945880cca8.json and https://artists.proofprofile.net/proofs/artist/dcf19526-f9b7-487f-9f8d-1e945880cca8.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 0x761bb5a1f294884bd97ec7920aa808212eb14e483474fb1dd3234b75196d86fa. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/NOVJT1801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f888e3b59cedc31ef2a72569725a67c7a280b4965bc3f7592b179d8af6b6fb. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/NOVJT2301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c8da3d36284436114f0155b0f4f5f74161b8a0b0e63e18533ee88f86fa87d8. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/NOVJT2302010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd84c2285eaf9712b5bc6ba003c8fd98470de85ce7ca350bf38750437436c607. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:59:30Z), 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/NOVJT2303010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048b9f69a480b8fab75545797cf075087cca6539452979f0f8b7a897ded31781. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/NOVJT2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6b39f1012e0711d007b592d821a47e37e938c368fee93244d0fa22f64c6bf0. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/NOVJT2402010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81642bde110f6531120f9e4fcb0ae64421b38fe64a68b92ca1c87590906f1a1f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/NOVJT2404010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5018535a7d29b64fa870cc7e5b11ffc2f7d5859f840379d911b8dc0886685436. 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/NOVJT2502010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48a9837030167e06b1868e522ab0b1160cb46ccbc4af7582e654e0d797f360f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NOVJT2503010.