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 0x91df5a6c777dde8eaf9f620291123d9deb91d3c7da885218292ff0561f8176a5. 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/56bc27a8-f590-4006-bb5d-ac7d4a61dce9.json and https://artists.proofprofile.net/proofs/artist/56bc27a8-f590-4006-bb5d-ac7d4a61dce9.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 0xcdac23654a77fbc2b67ec03fedc0f1354189075842dfb11526cacc86601eff0c. 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/ESA112429037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b5bacb3a4d66f8c839ed29532f0f9db66be8a329c2c542350ca840762b57d1. 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/ES23F2500214.
No Passageiro do Hyundai (feat. DJ Kauan NK)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe492c7cdc32d5751915b62dd9535be98f4b64805ede46210157d91382929673d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BCPQB2500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdc68d32cec5259d168b2326e4c7813b49cccc2ab61447f40d6c3226e7541ed. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BKF442400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f65450880a898e4e9ed8695286353ceffb86ab98fa387c98eaa743b603e8304. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/US7VG2539344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c6beee82288a5077f0d149911b095fe45e482bbf873aa0167e21785efaae6f. 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/BX4IU2421602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391f4d92b5267c844afdb932251e783f39e8c8b01646402e1baf6ec266b8f787. 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/BX4IU2421601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148a9aa516a0c5f7d7634975bc9ba5a78144aeb573b2dde750a7cf97a120857d. 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/BX4IU2421600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656d810ad2b0c05743ac47d59d94147c6b288978e8a150e3917ae7f9e401cdba. 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/QZW9M2418870.
Quer Me Dar Cê Fala, Vou Negar Peru pra Tu Não
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf53f9fa70594aeb7756204cdc30e3fba13439dcd20cc74cad8099ef46278a7d. 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/BKNU22400339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a984dd91394432ac8e8c066a71f0a42b69e4aa02dc79d85b603534e803f4d73. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZW9K2428397.
Aglomeração de Puta no Barraco (Slowed + Reverb)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236267f63a8d2158b24978b037b0b63497a80c450c4a12ddabfec44fc8c78995. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/BC3PG2403437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92abd692553367cd8f220e58beddc1d73984d84c661fbcb2b10e0def1efa41d8. 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/QZW9K2400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4246e6a32c372fd4df7b8f3d4bccb441ed6234cbd7af541ae7b9451659492315. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BX4IU2417505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5766aeb7daf43349d31c13db65da73818d2cdd05146ec4e1d1cce4d51a2fcb66. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZTPX2464378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980d45bb67d28f172c4b7d2c61863a6634a3d707efd9a013a80a260811776b43. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BC3PG2402691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fc939c4001da685ee1008e3373edad21d34c2f324ad7d7bf65aef6a8247852. 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/QZTPX2479158.
Mato da Fusion Fest - Homenagem ao Casarão
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf5c39d930ac5b297a15929e8e4510536ec45a0ded36c64c698029581ed41d2. 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/QZTPX2454562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20867395156bc0f8840906de42559f0d1a9399eef6a56be17f53cbe11a38734. 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/QZTPX2411783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdc68d32cec5259d168b2326e4c7813b49cccc2ab61447f40d6c3226e7541ed. 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/BKF442400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb48aebd1c31de2acd8d995400d33c57e180bd0108edc6ae4d577eb0b64b621. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BKTTW2300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94953f2cff3893ec634f08e6f1885a04a28677837adebb3a3853a764effda4ec. 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/BC3PG2400516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0629a8575dc67daa50f44914dc1d9578cc090732c47126534f60a3eb483635. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/BC3PG2306741.
Com o Dedo Cheirando a Xot4 - Automotivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672d2baa50272dc5abec2c776579957d8d509cd0ac7f59922ae217eca3b3cb52. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QZNJW2499209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e1ae7039e0daca997e7ad038ff9177d76df77dab2a78b50c8327ecfab33306. 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/US7VG2469838.