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 0xf8eaedffe4b4dffd368e96f4cb92e87e6023d2760c8d3aa1ce9d67b543bdf2d5. 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/42b941bb-0ee8-4ab5-84bd-ce1728ccaa53.json and https://artists.proofprofile.net/proofs/artist/42b941bb-0ee8-4ab5-84bd-ce1728ccaa53.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 0x18fc92c756d4cc55a86a60b896bbc9a00570f33b3180d394197f4a984e4e388e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/KRRAR1827056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59065460d5a0e3a63982d259dcf209b710f74281e0d777a32b3cb1a2a3f98fa. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:21:55Z), 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/KRRAR1827058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb899365b2c7096d36db80736e4a3665b834a4b3ce3c1b26a4de38fd45d280c0b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:58:44Z), 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/KRRAR1827060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc678b1e82615626e28c476f569d9589dd61a16024472d3095b907021b29ea927. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:55:59Z), 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/KRRAR1827062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae221d10f9bbd50d662264ef371a5d756b1dea7052961de2834a64e22e8a5b9. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:48:14Z), 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/KRRAR1827063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfaa8943065d3794e28f69dcff9251a7056454fa86c3289b04eb9fdf433d28f5. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/KRRAR1827064.