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 0x56df8f9fa0be73deea94b0cfb8095a72ef2df7ba1b2cc9acef4feab56eb7ccca. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f534a9a-0ea1-425d-bdb2-35110d0a5b95.json and https://artists.proofprofile.net/proofs/artist/3f534a9a-0ea1-425d-bdb2-35110d0a5b95.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 0x76171872c0ae9f1c4fee64e37ee02872f08bf6727d0da1d7a04e99064430a854. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:24:33Z), 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/QZHN82113102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1aca14455cf0fd1e9cd8f15e055ae04ea88c5b166a2c091d4a3a1e5fefee290. 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/QZK6Q2139875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8217a9220623ad25f70d3a24ecf00af1fe28ff0f93e8ea733c1537d1080635. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN72296654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a9062f79baab3134b97b5db5bffe446ca46a049ac98fb3148441a91d75c410. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZTAW2205565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c6a96b254a630799babe13c9825c2f66c2d7aa6e13d6c5a46b98698afe1efb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2343626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc48ab342177961a04835a6db52422065c5795e00ce4a30fb887f3a7e2c0872f. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZFZ32496220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5c33ab6633698786cc2ecfd4ea9dcab2ed3009cf8cb54cddccbe62d4df8389. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:06:46Z), 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/QZNWW2405223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f483dccc4e230db43c38e8052330dffca31518e52efc3787e121c62105049c8. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZES52518108.