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 0xde5027630f01b6afe34ed8a6f1b87e2ef3a7ce3340ad1678c765ef6dfe04744e. Chain 2 (Bitcoin): anchored in block 953896 (2026-06-16T06:05:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1094a902-c7f5-40e4-89a9-2767c9f60135.json and https://artists.proofprofile.net/proofs/artist/1094a902-c7f5-40e4-89a9-2767c9f60135.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 0x9b8d4545e0e68801ea9e8969841c8d20da270dc502814bb75f1a242003609221. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRAIA1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bc12e41d6a33301484ac50facc6343b6c43cdb21687bea28be5d9a07b5e4b8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRAIA1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d9cdb4f1e420ba20ed85e8bf7237ae747755f7f22e166795811b90b773e89d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRAIA1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e6b08077b496e22c620f528c157574d7a249a5988a6119fc40bb0c3fc54f6c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRAIA1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bd28b3697fa9f68526d2192deb89affd8a30e37991049f671d79f723f323f2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRAIA0600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572b8d7514e6f00cf8a56dadf32b14e6d82f0c21339855b288c68e3b2d9882de. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRNG81100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0ef6f9f9975f78e259e90e18b790d2a00961ef64aa52770ed545ddbb1c5ab6. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BRNG81100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc49a2052805d62c004616cadc95320c732d6d91669dd3f08914f471935a24d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BXRIY1500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacd5f20395515d029a500991359387d1f79f819c05630eff0e4d601d1cf014e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRAIA1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b40cd9479fccda598e9ade636a792ca5fec04055240358e1935c38de1a000a8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRAIA1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008b2824b60bc95477fa2d0037472eea3dadce85bf17d4c33955df671e190509. 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/BKACE2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceadb17fd3936264fc5b8b8eeb51db12871660ff2a42953178c90343b5ecee8. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BKACE2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba1cd7397fbd69a7446a3dcfa1046256f8299b220eaf24a30c8292874355154. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BKACE2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da0de0bf98ff00c1ab7f693ba060bb3c59b72f41bb1fd3ec879950f4e70cade. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BKACE2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035791dcbc3c44e132fcbd0f0cbdb4c0952a5deea7a9e425b95bb985b0f8322a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BKACE2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc31d4d85189fb40bcd7f5f600f310f5e8fc3a8fc96a6ca814c4c2dbd1cf6a9c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BKACE2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40c8f403854f9396e42fc1f13bc9077f85efc83f0b7cc2f4b6a8c91906e3058. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/BKACE2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259dd94df43fe515f51bd73afc35a3b6cf6b95d0405609f54802db2d8eee3f32. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BKACE2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56018053a5533dd37f1f53e26f6b8cbf46a0ad18ab4b4873e0d765824cef10ee. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BKACE2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbea9b9f999022649d01f1f85fa64afb7fa3247e385bf712939f947600d2c697. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BKACE2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384a87d3fae6eb042b42364a5d738a84dd7a45d84726a584261aa2a06da5b256. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BKACE2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50180f208fa5a329de8fda93f58a5b79bbeac6f6429fbfb3198dd993311132b3. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BKACE2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7078edf43bf09e3797f7f4f62382dfa3686739b3edb142e2cf970b3ac02ad90d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BKACE2400012.
28ª Moenda da Canção e 4ª Moenda Instrumental (Ao Vivo)