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 0x8a1c0c5712e5fb53a4ab4e3975d081b3ac788279753af5db3b16659b069f9e83. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/adfd58a1-a1b8-47ad-8f93-99538f42258e.json and https://artists.proofprofile.net/proofs/artist/adfd58a1-a1b8-47ad-8f93-99538f42258e.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 0x0de5c8b065014a0b041f7c6e1724ad64c66cfbb4f4275532a63f839ca1248c68. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/BXAK71600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefffdc4dd8515277ec88996fa360d29afa0ed28d41b684f4cb6a5cd3c47d98b6. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/BXAK71600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8d88e1195535a22c6b379693a4dcb7ffc80fe380343add7899743bf6bee120. 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/BRUM71301416.
Apenas Mais Uma De Amor - The Voice Brasil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfe7e7de5200feff5a14154ea59f89181f4ae139841e7985e1fedc2fde97bb1. 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/BRUM71301448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fce377d83b20b33316a42a8425b28e737f9509b603d8ad4e1510e658ae5440. 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/BRUM71301456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c9ee23d7127eff8f417d3041034ea598dcc90a9df365af45e59ce893a615c1. 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/BRUM71301450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c563fe2825dbd8b4ca39ff9c7d779c39d41b3ca3dcfc2ab155b65bba6c27aad. 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/BRUM71301445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2d26eccca14f39936917a05cd7d0d193365bc348aaa96a1d9fbe13091af16f. 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/BRUM71301455.
Medley: Gostoso Demais / Isso Aqui É Bom Demais - The Voice Brasil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf29d25db94d9579ccf8557048b76b536c325c1e4ea31c2f00ba790d5145a906. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/BRUM71301420.
Ain't No Mountain High Enough - The Voice Brasil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15725a6bcece949109dcded0c0bb01df054595f394a8dc33091f5433e78ddb2. 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/BRUM71301418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709fa5ec72e2cae0de73e8564d0e837d185b53428df7b771aae9f53581cbf633. 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/BRUM71301447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c00bf31ae39b6942fb8b43025f274224810b8c8e78589556c55e3a823b88ca. 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/BRUM71301457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba2e2b0e05070d4b75e822a0f4985cb555638709172074ee5b196ccd1f84613. 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/BRUM71301444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d36c27e83408eab4394b0814f912b207e38232b779b266f7e468a07fcf0a381. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRUM71301451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8079d4a579680abc340fd9d24efed73b9f30b0e88632cdff4617deb6c48c8eb. 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/BRUM71301449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdfeb7395f696ff7c8e56bef34674663f73a69893abfdf343dbf16a9a7ffac2. 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/BRUM71301422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81dadfa164d102dfa97bdb7a65e8211385cea6100baaf514d34deada11cc060. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/BRUM71301454.