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 0xc9443540b39ab7a5ec6d7ebeec8e0034acc223c2df4d677c3949978e239dc670. 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/de3f3153-faad-469d-8d03-1392afc29009.json and https://artists.proofprofile.net/proofs/artist/de3f3153-faad-469d-8d03-1392afc29009.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 0x791e4ff08449a88908865baccaf09d27004f785fea21f63a2c252ef081c3ff13. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QMRSZ1700684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fac70bd83dd61898861c5cda90746e1829917e66fce913c375dd8c583cb51f7. 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/US58E1500522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e97a35244de4f648c576237930d3b41791a84d6b16b7710300251fa4f9334eb. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:08:04Z), 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/QM4MA1600129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd43374bf415fc08f1f316a88d3e307844ec198c4db071933c496f626ab4e021. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCADF1743281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a0209ab10cff6b2be4a4939338b9896b1679716be93164d125495b16df4642. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCADF1743289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6064ce420526f7732e71e4cb8abd84915c4abae422e70b508e4e16e09b05ba9. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:43:35Z), 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/TCADF1743290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6541fb36586ac63b495997d93adfd8f6ecf7cb1ec47fe8f2616e1fe8759d59c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCADJ1722409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b04a3a0187b68f45596a26accae40ddec02262981652647677d64aca0be569. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZEWA1800006.