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 0xc77d330c7ead3afa7554a73fe1e7629d290b2997d27261d3e16212c9f51a96ce. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08e7da0c-6839-4d4f-a445-159f144b43bf.json and https://artists.proofprofile.net/proofs/artist/08e7da0c-6839-4d4f-a445-159f144b43bf.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 0x9ec938b6b3cfb7f930d0ef9f868ac8b768311511a3ca90108c8c7e557da2a448. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SEWKB1510001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28210dc0be081638754bceb641e8bda996cb56ccfaf5fc0787626788e6688d7. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/SEWKB1510004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e3d9852aa3687ed9ec4ab537d43f31fecd0d05e108ba82e80e42e83dccbc8f. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/SEWKB1601001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e604369ece70cfbd2c9541cad079a0b33aa55fef36e5fc6f72a3da20ee08d52. 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/SEWKB1601002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7e43a7f742ba3b2bde2dd352c6a3486f68df20eeabb1d152c359cc758d291a. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/SEWKB1601003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6686d3eeaab1eae7b0cd4005f410b99137a5e2c0ef210b5b276791415a27be98. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SEWKB1601004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654d96135a8b161f92ea18de66ccd11fb8e4cc6dfd1d3b9d9cd73cd6eeab3aee. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SEWKB1601005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80648f296acdf968081bac7fc7a736e6ad3d678738128a5e1ae2fca14e936c7e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:25:32Z), 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/SEWKB1601006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6caf6c414ad9a4e388e0e928e37dab49c7b392d3d3d343a608487d76a653d9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:05:45Z), 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/SEWKB1601007.