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 0xbd9b0867ba3d11691647f664f1741a5a72f04757f238106be2d2cbc5e2310fd4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9598f2f-87d1-4ce6-9411-e9c6c793c6be.json and https://artists.proofprofile.net/proofs/artist/f9598f2f-87d1-4ce6-9411-e9c6c793c6be.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 0x7df3398b2411ecb6065549894cfda007ec13eba7e97504bb6c094ad9fab65838. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CH6542387184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe017146390a8b9a2206be8a69575ed0e84edd6da4a51e53091280c3e08c82d6. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CH6542387185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cee547aec660a8abd83a7668a53ec41782d70cd026c1f8afe86ba2ff542dc4. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/CH6542387186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab2b68ff7af6fb3fcb39c9b078c435f10252a019014b3227860409dfc94f51b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CH6542387187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567e7e48bea3df44375f07a5eddf4769d57931044997763cf883304a8c86ad90. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CH6542387188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe9d5ed4abcb73bb2b0ceacd43dfc34bb33cf2da791af86284b2df5cc1029f7. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CH6542387189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb804be5090e678506b3966950207185f54783c18ae5e8a71fa25a0d499fcb2. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CH6542387192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd8a081a4e71f19e74b125827aff306b9412e2de7bb22eeb6d56cc6be3815c9. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:26:45Z), 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/CH6542387183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33aeeba04fb560fa7b1364ed870699a46f7c696b51ad849016457565d755e8a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CH6542387193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428b947cdbfff10a593e10dde4f27155857f116ebd86c175c3b956efb59d29b6. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:04:34Z), 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/CH6542387194.