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 0x650d047cfeb7eb1bbbca4123ce35cc25b284a030ef93f440707655df9f5b37c3. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad5d96e1-4788-457a-9c5b-0d14711e2ca1.json and https://artists.proofprofile.net/proofs/artist/ad5d96e1-4788-457a-9c5b-0d14711e2ca1.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 0x147aadfcbec4280eab6f4086406e6b3fb227a06ccecc47fe4f8ee56b6bd06a3c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USKKE2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1daecd56fb0dcb49684d8c566d92cb84a2aab3c723be2d8537d6924d52eb04. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:55:16Z), 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/USKKE2100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf849f4b4e3807faf1a368b8cab1e793d39ed3c3233c5ddf966d242731acd78e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZES52019069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73289bf17592cf24284df6ec15299e4e0b0f81a0c3249e1910fab6e3f4992913. 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/QZES52017814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe434db4956c0f2ab3ba4b5fb7c8683b1cabb6717eb906a24dd9f3a14f24b7c3a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPLS2289857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4485683ab4f08a1219edd3f3c359550d2a360fae372e28130ed6991fcf9e71. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:47:38Z), 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/QZDA42302813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd053b2982204505a6d06f3dc6c14062ce9c9e9f33596fd351dcbb54949aa7b70. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTAY2315085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864e8ec40c6ab9b8fb4560921d03c92af231143f8e94ee757277484d85a1d7af. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:06:47Z), 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/QZPLR2473221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17e76ff04f3fcf78c10f7ab54df9adbbfbb083c9eaefa02b55a621e0aba3d5e. 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/USKKE2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1daecd56fb0dcb49684d8c566d92cb84a2aab3c723be2d8537d6924d52eb04. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:06:53Z), 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/USKKE2100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58c48cae6959648e9d577705ba90a0e12ab8bcebc140c6e3795db821e9fa55e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USKKE2500005.