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 0x2fb28578a3e65001e3fae700ca406d708079351eec7ba2eb33d9886103a5c7a8. 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/0cb2177f-fce6-4c6a-9d51-77537ad2c769.json and https://artists.proofprofile.net/proofs/artist/0cb2177f-fce6-4c6a-9d51-77537ad2c769.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 0x508609e256fd58d28a7d4f56fca72b3e04727261a2cbd62c64e0a87dab1f9f73. 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/ESA011784664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643de81bc3a9082e219b7a82304a4145c26419c8cd13ef02b168d7b97c5d311b. 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/ESA011784665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb316e98b360f5f410cc543be6746287bee8ad106aa24e169c25fcd7cb9a581. 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/ESA011784666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83baa8745520070a035e44cad48c391e7d9d58c3a086b01f4b7371a6cdde5ea7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA011784670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397d2e8648334fceebffd4d8c1ded980e1bb71c50f2667b38091dc07e989df8f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ESA011784667.
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 0x5b3b1de2e0c908a451139907e3e4ab93480be182cc652907bbb193ba57830eff. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/ESA011784668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c341bb679f55329f202181f4c7e7298544f33d691305d3910fe16052d7eacde. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ESA011784669.
Até ao Fim (feat. Trez Agah & Master Bad)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf7e76d8d2a4a3d6ebaac9ed1582a0800b1107d62bf70fe5114395c696a7f00. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USCGH1967178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1200c032ce536545426f3ab3696e796d7a955234e997861a62a61e8812b92609. 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/QZDA82177089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87fc5411e0398e3ee237a07e6755ae3a96b0bf883a741c6ec43a9814f345220. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM21981958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49666b72239122902b6f6d2d4f56e6a6eceac08b05a6d95a04d6ed4a21a1d173. 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/USHM21981959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1dddb4a6ce1c18c68e3f91ab02d42136dbd659000e176a1ed496399e89bd21. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM21981960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a1d49337349c775a21b5826f5a888b3e3b26b9c6940b144670cfb2acba2cda. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM21981963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb4a68e703e3f5ba7197b39264f6ae62ef6379a335b4857a1fce09fac841492. 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/USHM21981965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8315723c31e2498f055b9e2c760e7595581f6bce0f6fdc413217ca0be5ed8ca8. 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/USHM21981967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa97189d1c467b3c933b1c1945db34471d4ae131cb653e9cea78cb81d0916f82. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM21981968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3b7009f5150e7ccf998f1fa029fea9125eefcaa5041c3ca2b6b2c40a3bcad8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH1956450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322706978eaa8d34062f3b7ec072791c6d7d09bcd549382cd88ec3415bc58846. 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/USCGH1956451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc7e61830aa6cda4b2ff3e12c0d95e1438279db845155a3b7b5f8fc8c9479a6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM4TW2079099.
Kanimambo (feat. Mi-Mãe & Daisy Pereira)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bdeb8a84a0ec516f96aa626a731b3a9ade9e71e166baf43750b50441b172dd. 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/USCGH1956449.