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 0xc99b812a13cf303ad1b61614490a0ded9fdb28aaf488b4cee9246897a6646932. 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/1a925c3f-51ee-4078-b5f7-2cf2ee3c599a.json and https://artists.proofprofile.net/proofs/artist/1a925c3f-51ee-4078-b5f7-2cf2ee3c599a.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 0xcb112586120a1534aeac2231cb2d52cd9d74b1ad1e719968b33bd18d5b544930. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:45:56Z), 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/TCACQ1633673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf609783f4448edcd925c8776521ec9ef9c03bec564dcba73cc66ba2f8a7cf508. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADL1835882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8772f7c700c2d30dea819680d60256520fe1b323cadea67d846d7b9764238d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:03:50Z), 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/TCADQ1896710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535f9546ea31a9634e2e17288aede8926f72f10fb394c52638d335ab7f62f995. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMBZ92026686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535f9546ea31a9634e2e17288aede8926f72f10fb394c52638d335ab7f62f995. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QMBZ92026686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dfa065cd3f84a688488c52abe3423eee8d5eaf347cc3330a42d8bd8c6d2b77. 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/QMDA72125198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4ca8284d07ed3541f9ca9ebd17afc9157aa9536e2c670957937d9867360841. 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/QM4TX2285613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e127103fe38056ae652d7a44bf15c6dc3db1f43a6307b9ce02427a123010db. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:19:43Z), 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/QMDA62218607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb112586120a1534aeac2231cb2d52cd9d74b1ad1e719968b33bd18d5b544930. 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/TCACQ1633673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8772f7c700c2d30dea819680d60256520fe1b323cadea67d846d7b9764238d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCADQ1896710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209735f08fbc80840e58a59b079d9f278dcc8cfdd11f821fe5c89d555c456466. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAEI1986103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253509ebf1604d09d86a40e3588752dd3ff8800f4250331f1184023ba560b74d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAHE2348337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6691c74f649ba205dc13e10fbaaa68aef37493e8b1a0865474773b53920a07aa. 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/TCAHE2348341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e745cc61c6b81be14c6ff8bc3e02c95c17de5dbf2d510c30df2c713e662908. 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/TCAHN2375318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d1808c0a6245ad074103d7cef866875785b9b4098d69aa38a98330aecc0028. 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/QM4TW2399773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880ead6215472935408532dbd170bc4ee0c155f98d685959cf7f2e6c8e7d48bd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM4TW2312105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c2ca47972a134b3a202a3bd5575640852ae67c8e4b2829aa95f63e6a263140. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:08:17Z), 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/QM6P42321005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af80137c700b5312a0e4383c7a37bcc8352c81f2b40339176014f6cdc5d650b. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:21:19Z), 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/TCAJT2591089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe472ab8f3de7008c20a4e72812f76f064a7235416a880150cfc2a1694f71523e. 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/TCAIW2454270.