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 0x34060e886998804ce4bb5ade09da896086a9b141962a12b8aad946989dac986a. 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/dbe8b4b5-5a04-4129-8021-de8e2b88dc4b.json and https://artists.proofprofile.net/proofs/artist/dbe8b4b5-5a04-4129-8021-de8e2b88dc4b.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 0x78cfcdbf5ec0e44dff3f9b2376d382d6251625f50d2d654915642c7ec4f3c86e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6G2514083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012c85cc6bb0b832582da883e06a2d372a92832e994aacf068d7a9d295a5e037. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:01:41Z), 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/QZK6G2514084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0016e4bb688c6fc3bbf00564703407fef5fec7a575f8e83407cf7f4a4a9800ea. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAS2510509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dbdb6d3a7d6331ed36a2750be33b185969b2f75358d81b68ebe63af7e8b7b1. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:15Z), 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/QZTAS2508900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b09e1f2cf06119332fdc2e6c5d94c3e225ec82b9cd631778a64a3071f6fa48. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:02:54Z), 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/QZWFQ2417940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4c501965b1421088adc9c8d632269c2335827d1275b0ba1e94460dd1b6f72e. 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/QZES82558702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cfcdbf5ec0e44dff3f9b2376d382d6251625f50d2d654915642c7ec4f3c86e. 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/QZK6G2514083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c83d803bd2d3f54c219a1ecb2a86ac11f1b4802cb6a25c22c966c07778f442. 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/QZTAS2510498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16d4e9f36aa6d21f82352d4e9fb5b177f577ce398ea38a185bf2bffe4405aa9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3EZ2589333.