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 0xe6ef756c1283f9e3b0e7d6c181f8de807d19e1c3ee63ae8c87674dde749caabc. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1462168-1c17-4cbc-bdfe-1ad71dadc819.json and https://artists.proofprofile.net/proofs/artist/f1462168-1c17-4cbc-bdfe-1ad71dadc819.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 0x5b331c09d92ad6a9a52966d958c0b56efe989951fe2e35e900436d370ea42d16. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ESA011718438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ec8d28207a168014977e5b1739f1a78c60b50a3c3cea357033e7c027ed5e46. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ESA092214475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa280fadc8e63f6ce787097dcca98b9bd44551693d0dc4b8af138af2f7284f9f. 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/ESA092316718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bf95b25c576562480a48f7d927d29cb31415e20c19f31c737ab088560a0905. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ESA092336001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565becd0ddf444fc97da197a27713cb88f8ae814c10e7213117ddedeafc2c23d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ESA092336002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3475b4310d24d53897b63e7829d8a3a08d3d700093bb2f75328f38f6ea88ab29. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ESA092336003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184eca8ab9ba3f89aff16764d44a3e91a37d4607b19d82a15a6f9f30af76f638. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:56:44Z), 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/ESA092406245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8c4dc01a73e15bb340b9265abd899bbbfb38a4db1779f0af67309439f477cb. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:30:31Z), 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/ESA092414829.