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 0x6212edcdd89aa22cefea9b55f4928aac2dfdc365fc2703ac033ca309cecc84bd. 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/eee97df7-1cff-4a8a-894c-7e6e07f66c3c.json and https://artists.proofprofile.net/proofs/artist/eee97df7-1cff-4a8a-894c-7e6e07f66c3c.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 0xcbf9051e32a05a02c563e440d8e75579bace8b741985495de2d401bd022cb3f3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:01:07Z), 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/SE66N2200257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46ee38f84e1aaa0e1fe2572dc6383022bc803e5c8468e47d777e63270557073. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/INH102406981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82775a3e1bc59a08db68b4f501d906c3c22a1c44f31457298b9dd0db1e30faf0. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/INH102406990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4c96566bcc1b8deb40393693c0f51cb818a053813fafec32b543a3e580c290. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/INH102406989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc508f2e941f39257193c04da836e4b8e1a70b92fd8f19af44ddb9489f71eaffb. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/INH102406982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad4c0e6f4ad68d041c3747bb8e9de0184356dc2c4bf8e7a82e735f68a56b2e5. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/INH102406978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e92498149a281d84699ae3003ae6fefcccb21a0ba2bd6fb132903892d82413b. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/TCAJH2553258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3041903cd6a40b198bfe7f539e6f70c691be46e54dba42aa7d1615ea8948ca8e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJK2573137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5417f28c615b20ae215e2dbdc32583cbd8d01ad8a54f3d60546f849e137a47a2. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAJN2578541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4efe4238b5ef090dad1714dd0cb57de447e7605f001ec39ab64e216946eca41. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/SE6XX2583091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e23ee66263ba0609d7843f5e996ca267f437a9db384a807a35c770e414b5675. 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/SE6XW2543980.