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 0xf83829a4ea1b5653ff111324aa8ae2fdb4c325f35e780dafde0d5909c230de44. 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/20c01555-244e-4230-ba68-d04154f6940b.json and https://artists.proofprofile.net/proofs/artist/20c01555-244e-4230-ba68-d04154f6940b.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 0x5faad1ce6788f34d4ebc4f4186f3bc531a8423d901dfd07b2e722ab0a972e6b7. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZNJW2502465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc806e13ff645eb9f7ba97794d86e25cacfd889b469cbf8967ab96b407d07f23a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJW2502467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f90db4962d34603208abb3aabf22cd45007413ed194de3bd6c08ac724e2ccd2. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZNJW2502470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558df5b6cb538ce2b3b5f4344e4bbef2a6ca1164235b5cedc2de7d902f0ac2c3. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QM3DF2187674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c07568af27eff806ef799bbf34f051f13b751816d0a18a7dec7694fe7b72020. 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/QZEQU2213043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7de5768455a19fed06fc7d1d678a26660dda920b1c1053ce5f822e6b2362c0d. 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/QZEQU2213044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bda0a38dce821237d5310a5a9b2f030607f4aeeb9ad7da001c0d6fa6370d9c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZEQU2211946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ea5e6e7f52344f1a03bd034f4fd624a2c0ad708f4c07451ab04f2592c9ecf6. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZEQU2211954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30154cf146d6cff9bf7d811f6237fade13907abf0051c4b5cd6189bb4770ec94. 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/BCSUV2200394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a952d3bf1e2aedded13310999add1cb692376381a607e9835ac982f7273a643. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BCSUV2200982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c2f002f20b523b6daafd1a167521985f722cf26468e52e7a6409a1916a7165. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BCSUV2303328.
Me Telefona (Nivaldo Marques na Sala de Casa)
Ao Vivo em Acajutiba, Inhambupe e Rio Real
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2282060f6084f35671540d0d0fe8f5f3a2b403f6058f133ea05787c1366b2c85. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DGA0Q2496881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078876f9a26d6749b6d295f49b17b5dd5d9e558a028ccf319a0c6a9f78d367b0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA0Q2496882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb17e4f0802b2fc6a0ca742dff3cb6e73e3972017e5c48b48338b6e9e3065405. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DGA0Q2496886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156f52071bd62e883f57c30a8fa4578d6af3c30c0e42eef41440eab7ae3e2391. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BKNI12500029.