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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2a2231a49cd46ebd3c2d430ac22558d6ae43011312ea301f7fb174908675ac. 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/505e36c4-226e-40da-af3e-aac00e3dd4ab.json and https://artists.proofprofile.net/proofs/artist/505e36c4-226e-40da-af3e-aac00e3dd4ab.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c00d99fea29ba8039c080da69dafc962ec31647da89b1883586fb6a70af7918. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/BKTRM2300004.
Para Pretos, Pardos E Simpatizantes (Episódio 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4291e0de6d3e045de938bd9877043fd08b99f141574857eac4b7c9aec24e45dc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BKTRM2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824bd985ab7b39e5dbe3279d15020d285c0be17101860bc6e2fb87be0c358e2a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:58:37Z), 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/BKTRM2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074a3b52a00ae2e7bf48f105075fce68a9b2a431e0d6cd0463f560cd355444e1. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:08:58Z), 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/BKTRM2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac47ea7638f1bc4fc99ad74da6311c08e476b3ae9840c069dcca847a445ff6b. 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/BKTRM2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc270f9ad1936debb9f11bc278bdc4784d649a46d81a7bacb17094824f56177ad. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BKTRM2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08beb9963f16a36354f40809955b718fc02d15dac34b7190bb058fcc4ae8083d. 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/BKTRM2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e079ffaf2e023ddbc6a8c7b61143f86c5c84a131abaeca309ac8ffea69c58f. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/BKTRM2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d536f7118d2a06e6fffb98693bcb14ae3da24893204552f60d8c09a62efc347. 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/BKTRM2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f267fa207071eaaee77a4f9b0dfb7ae543e683909d6714d02efadbb11bc64b. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/BKTRM2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62c2274dffb1e2d4404b7ba97e8a8b6286fc5a6fead11aa8016e00a378e6f87. 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/BKTRM2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdd143d4562000a16cd13a583008a097f323e3ec73ed9615bb294477e43d515. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BKTRM2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5d5ab301b81a02189572bc79bb5a555303b13e957ee7c7822959e845a09934. 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/BKTRM2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db700de9254bd3972f0bd61a48e6d3a385d8d04c84c596fa494ae2d1594fba8. 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/BKTRM2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924504718ba7362df459e5d0eb32bfa9dfeb763c17ccf19f18f418acd8b922a8. 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/BKTRM2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c9f5caca7541645343229055ef269de715d76f706cf7d3b957585ae7ae1e92. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BKTRM2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579b5f883f8a1865b60f6e2826666c22faf2e4a41ebde038f9adcfb7dd151856. 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/BKTRM2500005.