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 0x380dedcf3a36dca9a5b2003317908cfbc5e0342b05fe6e008b38d958004f4457. 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/f1ef8cc2-97a5-426b-a124-39771392386b.json and https://artists.proofprofile.net/proofs/artist/f1ef8cc2-97a5-426b-a124-39771392386b.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 0x5a44ab6faae00379c168d7d2f492d1bca2c0f942a450fa86db7c4e68fef8e3b8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZMHP2424429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a44ab6faae00379c168d7d2f492d1bca2c0f942a450fa86db7c4e68fef8e3b8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMHP2424429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dfe5294d1e110627acc5f27ca15373a8047ead6e4317cebadd02a7640d7a62. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZPLR2442433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb832ef5e353e7b2ecc04e506e9222e66d47a8767bd85fe7d22043aac8046edea. 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/QZES72572474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa234adf71b79c4907bcc69f31eec5305e864d7d0168da8ec80e67f5adaacca97. 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/QZES82568798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dc9c6f12e38a80e58419b5ac51d3e1686b42c20c26b2787a9e969e74445d1d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHNC2521948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dc9c6f12e38a80e58419b5ac51d3e1686b42c20c26b2787a9e969e74445d1d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:44:34Z), 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/QZHNC2521948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac63811e5c88769245cd104cf6a817c552ac2cbdc6c4ef5b343ed196725795e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT4K52503843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f3e4b9ecbfcfff0dbe2295d07b546c4c605be317082a16667295838c90044c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTBE2500292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acfb36470d96367cae0ac5b8cee4dcf937f013865d8f8a1624d6583d8dff801. 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/QZZ7K2594805.