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 0x7b8a0bdb462a352f011b2daa68b1ea88d7601fae856f98231dfa02a70cb22e5e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f680db7-9ce7-4cd8-b7db-cfd6df068431.json and https://artists.proofprofile.net/proofs/artist/4f680db7-9ce7-4cd8-b7db-cfd6df068431.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 0xa58939fa62127d42d1174a10c4a2de7917784cc672456d435336f1b88e7980a9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCAJR2534091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52b3d5a2e0bc7b0602af9e7de7be0380f2f83b4c57059f08267a6169edd8cdd. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:35:00Z), 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/TCAJQ2534102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dbdb3f000ca0f45ecb704704980c414d0918b5bd5cbf5493e640d6ce308f56. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJQ2534113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e210437d9793c362c769a3393dcbb3ad16a251a1bd4f3795604cebd9c4e869a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJQ2534118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6a6ee4f7a5e284e1cde2e80e06911e1f70333637352d66f2cb2386d7d47ba6. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:33:24Z), 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/TCAJQ2534124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40de0e606f4b03ed97912cbe17bba1b10a7ed289d94fc53bd75b5aa2a62b3a9b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:32:58Z), 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/TCAJQ2534133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e4a42b439af710b4e216caf51a9d00db76383fcef68a76f58ed5ba4ecc895c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:56:52Z), 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/TCAJQ2534141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d18fd496c9b4e1ddfc9c5b77603bb78a9aaebf15b2167d6cab5335333a11988. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:58:39Z), 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/TCAJQ2534153.