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 0xc679bedaf6013466f551dbce8d1b5a7bb68c8081873e4fe024915adada10bf42. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c794a3f0-5dfb-4857-bef9-46d3ce70d46d.json and https://artists.proofprofile.net/proofs/artist/c794a3f0-5dfb-4857-bef9-46d3ce70d46d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dia de Preto / Salve o Negro, Salve o Samba / Vai-te Embora (Ao Vivo)
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 0xc5d0c81782fff2e0c4e8753e61c17dd895cb080342c1e34669cf812c7ef69896. 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/BKJSH2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81dc29ef640e2e3d50db8d934d44235f56ff8255af9401e6df25a123af8d49c. 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/BKJSH2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dda50886892752fd123184a63feeb0c931bf378311d7daec53901e0425d9ad. 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/BKJSH2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb151b69d585fa4ec088ee888e59fca41b3368379f6a141545b70523159779742. 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/BKJSH2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0157bde3a9de43d27f79d0744ef06634e2af064c1e51f6350012e33da4dd6e. 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/BKJSH2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebaddd8302f00f95cdfea933e5885570687f773fd7b61279b7e4cafb2616acab. 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/BKJSH2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc13e22cda81c4473d5fabc1f602fa5e6a382daee57c6f70f3762d2c3bdfe9d. 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/BKJSH2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772360e4dec4e22e8b6a6b2fa9e1a2aea5bdcd52aa9c5623bd5d6b06161e2775. 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/BKJSH2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a1c4d7bebe06c25e171d21ed31fe18250992f5b5212e21751f377b53deb1f2. 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/BKJSH2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202346021994079a0c50daee9119aa49ab0b836215364b8df40065bb310c4e45. 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/BKJSH2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc294a6fa081134877cfb02d0643e9345762d6d53b9cd688095bf111e7af1537a. 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/BKJSH2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c1835a0e8b307830f0dab4fe6a903e89b3a333ff4d6e3c9f17ba646a8d3788. 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/BKJSH2200023.