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 0xb0a52c07a8d914fa7984dfafbd54e14f7a316d79a3431ed31229d2b6c7b362ae. 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/49a4240a-28fa-4245-b583-3efd802997a9.json and https://artists.proofprofile.net/proofs/artist/49a4240a-28fa-4245-b583-3efd802997a9.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 0xe15c4e428ffae288e439e151a2da8146576aa95d2aefca2800c7da4fa81d6b38. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ESA112322559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2733d5203a0540e33130ea44cde64d907629e9fbffebe444b061b4b3f17e1592. 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/BKGJS2300155.
Tô Apaixonado (feat. Trovão no Beat, Mc Jajau)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35e262e78fcc6c94beceda3f3ef746427167fda7717493ca31d5a0f620fea56. 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/BCAP02300695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a59abbe05773a3fe6353ed37a60294d1d8ed71a0d55d25500ac9e2154afc031. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ESA112446328.
Só Imaginando (feat. Gugu Ofc, Dj Ronaldo & Mc Jajau)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0d7dc5e1354e41a1c89f0a1683075359c9fc3c61eee5aee772ae45234f9a14. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/BKGJS2300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6d71fa251fef13256eb7099c32736592139edd11e16202bd3f07e3799f662b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJY2335810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edf22296ae7accdf83d71ab5602b7b868485f71d50f0ebea843a19f8d6bcbd6. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/US7VG2450013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5bfffba3d183c6a922959e4454a638e4bbb00341e62fdeb4a177fed09c4b1e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTVM2422949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0168cac90279d6efe11ea585b2a9e3b8a1637707a46e662aa6f09b70ccd6c020. 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/ESA112446423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a1cca6d1031c5f2b5465737c80d02a537560445864cc828438076de9c2d43f. 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/US7VG2582837.
Vou Dançar Pelada (feat. Danado do Recife)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171c7fefdfda4e3144d7930e76395762f7a2da41c16ad02600d1409514d9ad6e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ESA112316431.