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 0x30e381258f15f4f87796a59c27540dffb5c6831b805ee0f449d07fd2ac30a049. 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/97e6393b-83f2-4013-af07-e8f1ae4dd779.json and https://artists.proofprofile.net/proofs/artist/97e6393b-83f2-4013-af07-e8f1ae4dd779.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 0x9de4103534b1610b961da4c524f482bce52fb4464ba368e3613eae32adb4041e. 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/FR83J2200220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18e56c974a6bf73c3ea8d9ce1b6b56dccc0610647b734563f184cfa4b55c079. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR83J2200230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94741f2fb16063b2508e9708ecdf9048da39081a13d776b7aa1b4d6da6472857. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR83J2200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d00701c4a33d5bced04745221a7e33572fca80ecbb0acd0489d12346a44332d. 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/FR83J2200250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb23de5a613a77fa1c5644ed2f2e4463f2bb71340b804bacd3d95ba59105f00. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR83J2200260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc20093d45df23b4ec2f770c29270f819cd63723a716f6ab7fdd0708dee5270. 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/FR83J2200270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d636617d111a5f19567d86109a749496294ca7c8b9e8c44b8ce013f232c86ab. 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/FR83J2200280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2162af70cb49fa1eec253719650184420e709440e161abe8ed38fb9e2830a6ca. 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/FR83J2200290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9e397df5e28cc10da197da44b1b2d9931b2fb2a95452f5a03bb21b72eef881. 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/FR83J2200300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ea1ac69c490591f36f15e1fed00925b184b4f785c9864a0a3f64c666017b16. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/FR83J2200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97749ac0e05815c6c61603004cc884d63dc65e585f9909dfd0c5e5cd54a835ac. 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/FR83J2200320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe554a3598a85304cad18bb5db10950cf5a3e0165f917d48d2fa777c6f31511b8. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZZ8B2498674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c88e65e709350119064373775937357943e0e599b6022110f303ba699541f2. 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/USLZJ2585723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c76b83052d6d427771fcfc201177a2ce38576bb16bf757c514d9a0f1cfe4962. 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/QZHNA2529095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1e782a3139a595c189f869e95b9ae8c6cf2f88cb93f97bfc351ae566d7ac4b. 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/QZZEC2481975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7112f7aed6378283bf08d3993d10d7c2e273742d9e169000aa2c6b229d9047. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZZEC2481987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5653e05009ffd176d6e01c14bb0e18cdbdde1e1c281c3c54433c3a23887928. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZZEC2481994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70abba4cc7a339ba98139cdf94b1d5e487ab6216b7d10f716f03b70044987f06. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZZEC2482000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3666e2df08a053bbc5f32923810802fbb0eff2a38ba4bad95837f0b55869d6b5. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZZEC2482001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8949a86e6fb7705d3b8976c702328b3ada8f9efd3318d45df084653ec3bed0b4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZEC2482010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539f47c3095dbef31decb58c71e27c76d2767d35b25051874a045a93450e4018. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QT3F42574161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65630f4e1c1e373c0d3b1f8e7590de847eba622735729292f86a61cc40142139. 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/QM3JE2302355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99349f05f97f547855d996985786058c9f5d3983d6b440fb18bab536561af3d6. 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/ARL862000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ac1dedc9712eb270e68fe3d83291fb7f7a49a76a44c9aea08a58e3ee8349de. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/ARL862000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7ed6b02142a7e7a7a487842f7d0c2edb434476575f7a953b68f0704a99274e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ARL862000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc987f6f31706a8861eb3845e356785ff1c7cc9e4070c5a1a16e4a0c77a21382f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ARL862000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872f2d09e4f42e6617ee9b78d4d92a25765e60bfac846f330888697c1abec3c2. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ARL862000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6611521ee8381001a851c0cef5c247a34eb74c2bd599aa2e94d60e5375107786. 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/ARL862000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd576e379beed5467fee690dbc377d0a71cb7b95c679abd98176d0927fe0a4f11. 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/ARL862000007.
Tanto para agradecer (a Ivan Lins) (Aguirre)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932ae2e5ff0975bf9a9fcb2a64aa020bd32376f2099f89edccefd5dfe71e5b33. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ARL862000008.