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 0x94553bba3f8053b951cce8345854ec681b16fbd026fc62da58508d69c9946a99. 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/add47cac-3d7d-419a-b45d-dfd0476eb0e6.json and https://artists.proofprofile.net/proofs/artist/add47cac-3d7d-419a-b45d-dfd0476eb0e6.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 0x8540712c215be7e1a399e9a3c58b05ef8c1f9781bd27614812fa6ce245a706dd. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/CA5KR2258773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc103a18c7b9f69d0e8a488b4dbc907911d7486789945b010c1fa59834a02796e. 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/CA5KR2258774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62499a0ba96fc7b143d5aaf87f3d31b8b2cff12d2fec0b4933b7e8e1607708b. 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/CA5KR2258776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904b8ce0788fc55db05901dbf9de861f2e8f17d22b63cd2e467985615cfab707. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CA5KR2258778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21c3dd19d480cd698843ee95b2fa997e91e5ea11849547def24b43c3cff6563. 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/CA5KR2258780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f9d84395b73de6fe60344a4fc445b4d5ebdf392c81b95484e639b90f92fbb6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:53Z), 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/CA5KR2258781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2887b6d9e451efc793a66b30d386cf688d64d9bc737f3b86e61ee845985cfc. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/BRACT1300186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198f1b55beb4ab684439877ab922021479913676bbb30485e82ce5b0ef9105a3. 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/BRACT1300187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5ad15b76a1bbf45a5fcc36ed6995cf30c16f7ed51319aa2a3081f7b23d5781. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/BRACT1300188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22d1b6954dced1030b0971cbafbab617d5732fbed58113db3f84f0a9cd13e19. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/BRACT1300190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fec8c60d931cdc0f9b9df951faf9d394745e59dc3d136f79913b04c16931c15. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BRACT1300191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463952a95dcc9d6782797b019a1ebcd41cb8d868efe3856d8ddd7ed3a077d58b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BRACT1300193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ff8036f357244ee5cb28de794c1fe29a2e67599a0a4e11bdca2465d9127ead. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRUSA0700950.
Marcio Nunes Corrêa, Fabiano Bacchieri & Helvio Luis Casalinho
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd029160f6245765410218e6ee1307c64ff7366e36460b77c2b7c98e07fe0c687. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRVR11100395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d77a41612797e94c42ce7381f8ae578ee636c7507ea8e9e3b545f9b6d8ddc1. 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/BRUSA0300895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95493aecf3f172e253a07a68fe1137bc9d85eb40de66a53877f38b0817815357. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRUSA0501111.
Festival Nativista Canto de Luz, 2ª Edição (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ade19e0b788357c4fdd5b0e192400ba0bd7d288e8c7280e072e3241665e14f. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZ5AB2056707.
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 0x56a6e27025adfa56bb2c65e0faeb94699567b24ffc0a8d6adbfbe3da57e71b6a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QM6N21550849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd87c6b89d657917a8d1882af8d4e34856fbdccca7ad9ef099eb723ed384a1c3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM6N21550866.