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 0x6e55e92d2c6e9ea12351eeefcadc53f2b63be0d96cc637e03f62e2f450c2ccb8. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7adf3b2-fd24-482f-8689-420bdb0a7c67.json and https://artists.proofprofile.net/proofs/artist/c7adf3b2-fd24-482f-8689-420bdb0a7c67.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 0xac49c04b3090fe1e2d956b2d5bbe23d468335eccf96b4e5c59fe9e9c12e0f605. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:52:20Z), 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/QZHN42414934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3387d8ec73b45e8d00a26bc51776706f7bc0570cf6d8cd3c30b048febb6d8fbb. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:22:18Z), 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/QZHN82405335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3513ee29e3d618507290b387274c7f07957a26c0e6bd6b91ee9665118a2278. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6F2540109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa612c1d0fb2f7d255077cb6134cbc5d75b1e5f122552e53d8fe5884a963670a2. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZK6F2540096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef68ddcf299fd0b93193d35c74c03798132192df5e06741887b8d2ad466db968. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6F2541929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fbdcde60d385692d7a2706e23721fa66a4e5fabe5c2fdf73e037f7d14ee916. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6F2540095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dc5052a5e7513cc44e7c400a9658384ac121079243bdfa7c05a44cbc66f478. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZK6F2541927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9383d37354641183ea0ada6526d82e951c8a48856cfbfb4f7a6305eba6e2f776. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6F2541931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34eb267a78f692de45a4446eae6454e1befd2664ed6627373d50dfd197597cd2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6F2540113.