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 0xb653ed512b3714db1f5e22b173affd2af0c2e2aaea919d35eb1802681613456a. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c7197e5-58f6-476e-960f-856098e1b406.json and https://artists.proofprofile.net/proofs/artist/5c7197e5-58f6-476e-960f-856098e1b406.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 0x6b479f20088fe26f451e1b57a30fa7bd66e8a312b211d67ab2498a8e6f2511a7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:29:24Z), 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/QZNWY2350214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bf4c210811bc569de1457445b455960b1c726ad283359bf5163b7bcaffc58f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:27:31Z), 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/QZNWY2350220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac820c96c83137a8dfab766e3fd2826e94321d9b5ceb0dccea3fbefa71f4f8e. 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/QZNWY2347224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c612360b0729d3e6c435f71cc755a5b28cab8d4a824d4c7a3138d2c7a3718c. 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/QZNWY2347228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccfccf88d9ab7f9fbf022dad25ba1c8a7157061c9ffba0442c2aa802cea6ecb. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:19:40Z), 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/QZNWY2347230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa717aaf7338dec4f360dd440147d7db158ff311c962037a27e95746c4c35771a. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:00:43Z), 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/QZNWY2347234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82b923132a9c72be4955ea783f33f24bcbf35f46cd9d80cb70367d0724bb563. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:04:45Z), 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/QZTB22455309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3514aea7dae8b42419a937be0dd3e7ad241d525f2553dfb74043611a358349b1. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZWFM2485170.