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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d2e3b3ba2d786062528df1b3d74227d9121458def656c3d54ce1f8ed5ef757. 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/dcf0a79f-e4cc-4b86-9320-05bbd762274e.json and https://artists.proofprofile.net/proofs/artist/dcf0a79f-e4cc-4b86-9320-05bbd762274e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d9f81c67d295d7fa9ebcf606628ae982bd829dc079f168d96d8a260443b51e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CZA650151230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dc6938a7b375507fd9189d75428f5481d38df58e234bd3d9b5809e69fc4b23. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:05:00Z), 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/CZA650151231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba9e5c673f82c6816fac520ae1ce7093ba8f05e2c5dc6048b310e4fc20427ea. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CZA650151232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5a2172ec6ba0c24fc158a51f87a7966dd3ee0c01df0e145133f27ff57bf266. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CZA650151233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517087282296c299992ead602969dcbc9f94c5966f1bc335a1c4331bc118d527. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CZA650151240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a20678eae0ec593ba9772480317f3f546442efad76f7ae4c0ca2b82bba26a4. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/CZA650151245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd0aa1f3dac30f47cb4c6383a9f075a9e7955d52082736365014ea8f30ad2a6. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/CZA650151248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2d955342a6c3464a3f699c3642142a93d92d96fe7206617821ff755ca0993a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CZA210203055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee1141f17a3e81444685afabfb9386f3b346e604f7353d5de676c3d57c19d53. 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/CZA210203059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf267ad1f81661ba8c75edf1ca41307f61c83ec80d71b34cdf177c1cbf5a943a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/CZH381501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefead857a4f331c54c66b33f82a63a9faee7d5a945d8fc7876f60353b232a0e3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CZH381501008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9567e105d594a8a143fb51f823aa64e7df1ff74e0ea394d7f623e779cdb746. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CZH381501009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd7b388884206366cc6088e74c71135e8b3429554c57d8b491a716bfc4b61ef. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/CZH381901001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacce3ece0abe1b413efb223b84a954d4d8a048f6f12b8a8ecb57428a71bb5cf0. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:59:47Z), 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/CZH381901006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b706b0ad186023761f9d882883662f488893b6235d56c50ba9890eddfef407f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CZH381901009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd93f6feca6eef5cb5562ad4abcca8fc91e46ade496261e2f565ec65559a41f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CZH381901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5807c4eca6d3fba4197379a7f83387840e652e6f60d7eaf51d67aa0e09b32a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CZH382001002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0cfb86c7d11c4277c824446a4243e69d70704a95d503047975dd57ff93cdb8. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/CZH382001004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897bbab086f819028de7d3ca82ab8c92c4fc8e772e123419fa85b5c7284caa78. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/CZH382001007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d15befa7aabdca3507e4d62b6b748ded611716ddcf0ea419d613e6bc27d652. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CZH382001008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f2886a61064b64b888bdb99072f87574d26e967c81db941996d860b37dd799. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/CZH382001009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c9f3d5622cc9e3d53ea2fe136d6dbe63a746e57ead4b14535a739663e896d9. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/CZH382201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1d8a539cac0cd42f9f296b98f6064827b2242f314dbadd1e145c11d71c04c4. 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/CZH382201004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a3ed48572c8313a9063c9ffb8eb36de5b18d65aad0881774c8fbff11926268. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/CZH382201006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9c7ab20a499ef7b7b80be837ac190d694b760846a38a99e40c94194b3a0c59. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/CZH382201012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02309a888efc89fe43aafeb3582843f8b9c283a709be67bd7c9f0b7405947d8. 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/DED831801733.