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 0xeeeb1ee5b5cbc34b1b960f346f10aa94913d2eae5e35f12a21eabb3c87eb57f0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/166da201-d5a4-4363-af46-1d079ad02230.json and https://artists.proofprofile.net/proofs/artist/166da201-d5a4-4363-af46-1d079ad02230.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 0xcc6efe266e2fe1703048200d61af83ebe21bc161f6bc8b85e356b1a9ebcf66ca. 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/QZK6K2478105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbd46e2059b8f090fd18d44207b87819a5b7cdee08140c11871eccda2bc7925. 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/QZK6H2483407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ddc6743d21845b53caa01f102552ab8e19b728e9d95b4d45e5d7af13fee5c8. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:21Z), 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/USLD91759406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fd2e40d8d4b9a384e28c8ff64f623e2ab5d0f68ba2a7694ff18cd780b7840d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:20:23Z), 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/USLD91760488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b41bcce28f5137b18b12043ffe4625581b572741a9cde490cb597aefe4abdb. 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/USLD91760497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a467c90ad692802d3dacc52ae62aa3d6b00f320791868fc67525655beb9466. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USLD91763861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e024c73dd365a5ce56743baaeb44c511ae7dfe88ac314e7d1cd75afdeb83b4. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USLD91768082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66be606daf0a7599a901d0f6a6ea123280ce51b03cdebbe7a8490165850d801f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:57:30Z), 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/USLD91768312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e024c73dd365a5ce56743baaeb44c511ae7dfe88ac314e7d1cd75afdeb83b4. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USLD91768082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee298d51c6786fec0bba45771de16e005a63d1c3bcd0f04d763382c83b9e1ce7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USLD91768311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66be606daf0a7599a901d0f6a6ea123280ce51b03cdebbe7a8490165850d801f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:39:51Z), 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/USLD91768312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf06e188d35949507bf0a3f822cbf1593b4efe71b9e5c43252f5fed77030154. 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/USLD91768313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a72e28b15590b96f310ad8e4bbb6578cdd96f93ffc36a56de38649bc92f7d4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USLD91768314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ac5389333fba4d89a1ca9f5add844abd25412d9d61cf4e005619fd68ef4698. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USLD91768316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4698d9db3a585b638fa28d37868709c77e352f068f7d47e69b4f7876404675f6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USLD91768317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d79e4648725ab61e96160c4750eed81883a39bbabd32b7b53aacd2d06483fb. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USLD91768318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce7d2fef63727888a6c07ab7042244ea5680412eb949369c7dc1fb2650f7d81. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USLD91768319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8a775959adc8e5129d7cdb932aea89536c52f304c4ee4652bcc68200afddd6. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USLD91768320.