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 0x6aa4b7ab045dbfd5219029cb3a47016857ff51045fdb87d74825ce58c1f686b6. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbb495f9-ebb1-451f-b319-b0b5debb150b.json and https://artists.proofprofile.net/proofs/artist/dbb495f9-ebb1-451f-b319-b0b5debb150b.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 0x7da54fab96d06eb34f22b6a7b704be3a7f0536f03c9034aab2f410dc573a89ef. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/USDHM1417704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9ded5e91f075961a7d037413053604406e33f693c5d45b4abf93771cc2548b. 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/USDHM1417705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95c37a0414dcd3040bc0d25c566ada5efa014afeb4942f2e280ecb011a3e3fe. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:59:47Z), 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/USDHM1417709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241bab55437b3dfe5032be5d36e7bba642fffaacd8694dc6349d5ff707931861. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:52:06Z), 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/USDHM1417711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1c8e72bface19ff3d02884781527dadde33e39383649d406a7b7ac44adc1d3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USDHM1417713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3009e67685635998815480f62e1cb5e7df7ae91c5b6e8a13a2bbc81405b46d8. 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/IL6652002168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9066da25ec04e8d81934f61cc753551e15c7f3cc3eaf8d82039ec958523b7a56. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IL6652203813.