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 0xdd4855a4c6fbb6cc193d526cf18bd0fb0197ee5ad882aed1a25fc373260bbd26. 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/b1e0f213-a9b7-42d9-83e8-3e18aa3d67ba.json and https://artists.proofprofile.net/proofs/artist/b1e0f213-a9b7-42d9-83e8-3e18aa3d67ba.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 0xceb614dce9095dd1e5e30f14130f2fbfe7a158fc1c5fe8a723760d829f4878b3. 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/BRWMB9703005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb614dce9095dd1e5e30f14130f2fbfe7a158fc1c5fe8a723760d829f4878b3. 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/BRWMB9703005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb614dce9095dd1e5e30f14130f2fbfe7a158fc1c5fe8a723760d829f4878b3. 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/BRWMB9703005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae59e2ba007565ecfc6c4cfb14aae39c997bf458fd85092d7f1f7f3ebc5a700. 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/BRWMB9702998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5bf6be4622a26fe76714f2283f0f3292a7c2f6e8f63ac7ea1d8dfc6e64ffa8. 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/BRWMB9800924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed2683e11aab0c25ddb68e381d7b4f9ae7433365228e189c014778b47213bd0. 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/BRWMB9702997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2964aa92cbd2ab83250d79ccd7b08573cb21afca747ef22553f85993227e9d29. 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/BRWMB0100498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1b494af3a6c2125e00576ad5c2ddd3f04cbeab4c4cadade2319d9d16366e62. 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/BRWMB0101086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1caf6afa3a21e801547ea65029432c29ac2cd02dc1e5a404b3835ceea57798. 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/BRWMB0101100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910eda18a9116fa8a9c6c83dd4e7ce3dd4130ee4c52df96e6089d2d84b20c903. 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/BRWMB0101112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77b2f87d7b9502ada4843fb27dab0e1a43a98b78835514c9a654558807dc8e4. 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/BRWMB0101113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7608bf4699479a459df48c17e7800fd7a2b0771c1c91a436fd4ed682b46e109. 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/BRWMB0101104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef578318dda769a96b351f80075a3c270bb0911fcaa0ab11edc7ecac62636f98. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BRWMB0100500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048745c8082b7786a941816a5405b074774f2f349825729bbe6582f0139ccddd. 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/BRWMB0100502.
Rock Brasil: 25 anos singles, remixes e raridades, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408adc8fc88c5187627b961ed1b810522fa5d6ac80063f553c21ef3f688faa6f. 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/USWB18800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35af769dd4c1e9be87ca5b39d411298ba10493ca5cfe851ca05eadac1afe71a6. 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/ES5151702307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2dde248064444cf258f748bf876244463f94fbe1e3e429babcd5f50a673a4f. 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/BRESM0600191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd448a872265adeb7d4f9744c544914016a9cc6820a79e4f4f3dfef4b49e60d42. 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/BRWMB9901493.