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 0xf95e1ba7ef206bcb03b3747907a5cceaf56e9090c73151e08a4f9d1a245cd339. 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/b18a3f92-1249-4b7f-b1f7-b4ca4269e644.json and https://artists.proofprofile.net/proofs/artist/b18a3f92-1249-4b7f-b1f7-b4ca4269e644.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 0x9a33a1661311a1b651d90a31524a6265f418714a31c43f2e1233b0786cf4e4e8. 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/BRSJL0300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39dfde18faa286ee4e50d249b7fdc1ffafd55d09016af643cc64991125fb743. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:21:44Z), 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/BRWMB9703912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d254535f43f1350d9507eae2233f64cc785ab4462fd126952ea4f03c8890892. 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/BRMVP0401083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3922a0197f8f210bab9eca66d75befa1b666593b7927f5d91e50689f1c9ab6fb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:14Z), 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/BRMVP0401084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbd6d31745374b221b0c278ecf35808d6f6da5e30d1920958b77b4b5db8df5f. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/BRMVP0401164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f307b363e841e551e896d9f7579ab396ae2e9e0f043e049fa80b0122a3ba9d4. 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/BRMVP0100255.
Grandes Sucessos na Voz de Jane Duboc (Edição 30 Anos Movieplay)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf9c722bde03b8289cbffbf06905546115d489350e0e68277153263e31ff3c1. 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/BRWMB9703898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9c8ec07a83f163e6de5a406453bce0e025428caafa48dbef5215d57df480c8. 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/BRWMB9703897.
Canção da Espera (Canta Egberto Gismonti)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee12303b4f338e288377d7109fc0ee2e55b102a0774c52e37dd93b98845d778. 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/ORANG2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfda4596e684003d320cc1d24fb7cb8642ea535723518aa26f97dbb2b50d652. 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/ORANG2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5d516e1c2734ed25c65e4539f0f40d90dc39bb4f7cd49fb8a2be9cc46ce64d. 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/ORANG2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ebe79392ab5df3c93323ac2f8ca9d4396d37596ab498f7ae2d4aa0f43d217f. 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/ORANG2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa8a58b1102704d14e9033bf44d8bee1dd4ab622a793a95a76c720cb9c64f69. 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/ORANG2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd505ab2c6fcc2f1a4a09ad33daa272d45387717ba46fbcbc7b2057e5335da602. 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/ORANG2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee12303b4f338e288377d7109fc0ee2e55b102a0774c52e37dd93b98845d778. 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/ORANG2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa818504c58a0ac97dd4240317d9ef3431158c5fced1c26885b55acb156aee310. 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/ORANG2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9d681a02d36938354da8759fe4bd97cdc04504ee05310d7c000551cfad7f5f. 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/ORANG2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd369471e5a12798a1ea78a134740a86886a03eb2cee84e35749741112cbc035d. 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/ORANG2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301b648f0d35567705936dbf3f0ba0d0e47cb253344ecaa276d696496da4c786. 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/ORANG2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ac0c2994f41c065323521af1bfd80f9aae219f16845cdc65a5ae2a278c08dc. 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/ORANG2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ecbed068f32d0d506f045b28b806b28c19c7eec447315cab73caa67f09ef7d. 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/BRSJL0200031.