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 0xded49208541641e4ed4240186c2c9646c9f92cc2fdf58adcf4cc082a69d965fb. 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/56de3184-64ed-4e7c-9054-9852e5d5e274.json and https://artists.proofprofile.net/proofs/artist/56de3184-64ed-4e7c-9054-9852e5d5e274.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 0x85a1e9c28cd32f2fd905ae889930441aead399dc85a9037a533ce612daee01b7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF1316639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbee235a46ebee2b5747eabf550f514c4c355d873d140db06f75d135dd024f2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US3DF1316586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce748362baa26116f9f553d799298240a8d694135e3a08f53a62c4d24164e03f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US3DF1316587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0501e185470c8a56335b201f28dbf39eb96fa71f61effa8613ad445c1ac47b8b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US3DF1316629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9893136f5816891636b4daf1bb3ca06ee4c6532a80c7e5f906d6ef2be70736. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3DF1316585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9c4a256f637f85f7f88c30d2167ae376da1922dbbbcea4884b93c565ebb08c. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/US3DF1316576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47269d686e056480d43cc50117e8cdd51715ca66721986aca32a2c1c327fa472. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/MXUM70803500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cd72b8e4148110a666b26879dcbe22bfefc525d965c94df6fe91b8cc027f01. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:09:30Z), 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/MXUM70803499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f1fec263f17a0d19df378eed9a537b2437a74f4ff3b00db17149b5aeb73d25. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US3DF1316719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fe06b1ddc0c2377ce1802552ed71d051befd63b88187c0e0403664fa37e73e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US3DF1316604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2aeb1538f02159b6784378642dcc165fdccde3190bbec28873c9497e23e438. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US3DF1316608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0501e185470c8a56335b201f28dbf39eb96fa71f61effa8613ad445c1ac47b8b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/US3DF1316629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71c305eb2596fc74508f20f74f3bba2367eccf8c7810d5961da79077cde8862. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAFE2020182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bc38567abc5c66d4d5eae5717234384d239b6faaa049da6e634e9b84cee092. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US3DF1316602.