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 0x49782297e26a95b4746c1e6060cebf9dcf26703be61d95b2084fc83c420ed65d. 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/cf53f172-0811-4379-9df0-d83e4b91afec.json and https://artists.proofprofile.net/proofs/artist/cf53f172-0811-4379-9df0-d83e4b91afec.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 0x918abe3a0f7cd98ffe6a20e70738e7ee7573932f7499c19ce3b640e7350f3962. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BR8HZ1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d75e00076304f5925be6a8ce63de0ae819980817ba5e1ec314426a51c5c7cf1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BR8HZ1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49de6bb8d9a9c8c1679b0a4079c656f16ac48d6b2ee0f911dd65f1698dba904. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BR8HZ1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673c5d6e36b175c2295bf41e0b9adb49ec52b52c7ca71c2ea5763042ad076660. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BR8HZ1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47db338d19126f3bcea448c416a49d90d0b4b8b3c2aa4b63f4d590c779c73753. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BR8HZ1600009.
The Emo Diaries, Chapter 8 - My Very Last Breath
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa324cd547be34592d8535d0ba141e1f38208825d0b3fceb5df0b8664dbcf7a0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG1462558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f90622d75706267ab37875e272003fe5e0759009e9d6b5fc1134c47b5821e4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG1462559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba93145c5bc88f6eef2e7008159d03330ff87eacfa8a91dd2e8ff58fede28ad3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG1462560.
Ao Vivo 5 Bandas De Rock (Ao Vivo Em São Paulo / 2007)
Quebre As Correntes - Ao Vivo Em São Paulo / 2007
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8478861b7e8db3e2057f4f7dc806e75640ebf7acb8c5270a571c72dc244023. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRMSU0700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1fa28aca4d38de5441736d8215ffe46e51cef8362085e27eda071a9b08a1cc. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BRMSU0700028.
Minha Melhor Invenção - Ao Vivo Em São Paulo / 2007
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d53cb427fdfb5ad30e1a9251b20a37409adda783347e784a4436dc584f5d402. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRMSU0700031.
Sozinho A Dois - Ao Vivo Em São Paulo / 2007
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4f6d36143c974c266104f1a38052caa920b2423155b65917f25069d1085f2c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRMSU0700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509f2de7a7e9f0d70cc6c7fa95b00e7782515b355a9d974490a0537c5ad5b6c7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRMSU0700033.
Hidropônica - Ao Vivo Em São Paulo / 2007
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fd63b435c743d701bbbe74d797c2ef3095cd40e7d7a98df7e3d1149236c9e3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRMSU0700035.
Além De Mim - Ao Vivo Em São Paulo / 2007
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb78f5fe20eb2068056e01b17babfbaafeb83abb354ea0468936157e9857d5d2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRMSU0700039.
Guitar Days - an Unlikely Story of Brazilian Music