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 0x12e724abc906619fe9021bb60905649cbd033f91c87487fb397f96f9f3e300b2. 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/33672a52-1f11-4236-b3e3-0ad68b6201e7.json and https://artists.proofprofile.net/proofs/artist/33672a52-1f11-4236-b3e3-0ad68b6201e7.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 0xab30e97f4656bedce91d5fee27289ae9cf7a102cf364c414a78a9f2887e84513. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:38:58Z), 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/CAU111800661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5f1d22b0b001ae5783aa44c1f14bc9fd4702137a2c97589b4e2fb67c86f696. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US83Z2300565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e0e7d1875c95007fa514fac7b63414022f3fd6476796f5b2c6061b22b64c32. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2300566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b15e4bb829379d780f23e89840043f3f6a75147c2c5d794d8e90f4cb54b6762. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US83Z2300564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba6ab13749ddf2de53ca4d2bbdc936a768064782496af6d0aa29b5b42ca74b2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CAGOO2547911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5fa8c0785dfe1b86673c6b7770831ac01f8b9a22b668833389a165dfe3e42b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CAGOO2547913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb488caffc5828f6066722de4af7517a79045dcca9ab00b176b83a9beddb21374. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRD9M2100920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc576575821dc1b39e3de51f7415a1fb47613f2f792a6d214442116792f9d3186. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/US83Z2149021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b15e4bb829379d780f23e89840043f3f6a75147c2c5d794d8e90f4cb54b6762. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US83Z2300564.