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 0x34feadee94704f4f112145b072c8993b33eb6f50db6ba676a90a5f5fddfe4980. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbd068f0-84e5-42b3-ab5e-8f3fff94bea2.json and https://artists.proofprofile.net/proofs/artist/dbd068f0-84e5-42b3-ab5e-8f3fff94bea2.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 0x74f603bb7ee292d993511fd52ea645732dbd07e487d39bb1e1dac085ec967322. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/US7VG2358805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9d6e230ad177c7b69c9c4c72fb4ca7a92818878e337fd20a1f66338b2f699b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US7VG2358806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ec0dd15181877c719d08ccbea13674a3c8c28d4b886cde234f5cf4afa68579. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/US7VG2358807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa279dd2683eb351fdc00e502d39a2b44722cfc74a0b01b0a98de3da68e18bce0. 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/US7VG2358812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b45c1ddeedd8fcda4376a00e222b8eb3c44d122844cd8a3c51ac661678bd3a6. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:38:50Z), 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/QZ5AB2448731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d961dd4d63df2ccfbba244d9c7573a47fd5a850e32245d0409d1fa9faf4ad9. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZ5AB2454293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9741bcca1481cc24a1d524096abfbd9975bffe75c13ef4441f04c480ccf07b6. 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/QZ5AB2459002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bf5dfdf1de3de3759c52349766846fe2afd22dff4c84ab0ffdace13fc93c68. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZ5AB2458918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625112be7234fbbafb0a8f028a1866731754055f9fc1a2ab827a892b52a7b3a9. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZ5AB2458995.