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 0x9ca2d01842c01085bf0da8d7f92e59adbfea5a4e6b699a23fdc80db7572d99a3. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/025d48bd-5c8b-45aa-a895-7a0db3748383.json and https://artists.proofprofile.net/proofs/artist/025d48bd-5c8b-45aa-a895-7a0db3748383.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 0xd9c5ae438c7ee57704c68a21ff43035d19ab5e04daba21db09972e04f6d650c9. 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/ILTON2404806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6240fcd9768b6a7c6fb0e2517425e6fc6a0a76d331e6ac25401062e5454fd777. 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/QZTVM2318621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad583403a5aa2036aff2743a3345add6d8984be94d7e7569e3257d2213dd5d1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJZ2367946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538a281bc2c25e59c9614ed0b2e8322cc86b42886d0827855f7cb29567101197. 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/ESA112314527.
Faz o Teu Nome (feat. Os Quebradeiras, DJ Zullu & Stefan Baby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26e96a6a362489e3cf016fd2ba1b9c5ac201618fa56570a4633c11d08e6f511. 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/ES47F2300516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3156b7bc6e888eb0b1c142fdf90e88e3c7addaed7d55cef267a9adc60d23a9a. 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/QZEQU2258065.
Mãozinha pra Frente (Arrochadeira Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf7c52c66f39de392e987ad85221e3fede41181878faf87ce759722e6a524fd. 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/QZTVM2215966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b16571dedce7b066ffd265fdedb3be0f847882c414d44fd9e241a4fdfcbb5b0. 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/QZNJW2280446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdd067e62e1365d76968b68591a39cb86db5b8ed08a45616aa809ecc3a6828f. 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/QZHZ32208350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5364359e0cdce707736a46691e56d98c8f3b37659a4d28ec9a654ca3ed9343. 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/NIKIT2201301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c49e127bccc141c77eb5299515f6f831fcd101e0faea4ae20d9e42b490101e. 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/NIKIT2201302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508484ac69af95a653733532f329364aed4699015ee5ec6a9e73687e1011a148. 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/NIKIT2201303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ebbdfba4ee33da20388e008316e8958380bf1589cbaabdc81314ffa0030a7e. 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/BX85X2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b9e982bdd78d09aae7b849bfd129137f338b53c527845c67c3ba546454a7d0. 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/QZW9L2411385.