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 0x06733d17baec6817b0dcc634f02bf7699f22cc22eda704a051e7f85471aff148. 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/ba14e559-4413-4b56-8b60-4f86a2d98fc8.json and https://artists.proofprofile.net/proofs/artist/ba14e559-4413-4b56-8b60-4f86a2d98fc8.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 0xa8b6f9850fd2b8b3c86a50c981dd22b092f692863fe3d8e9aad57c3089285746. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZMZ92032481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9888405f5bf05a90408340b78aaba75ce28a4c72f16fc3c62a4a280c05fee68d. 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/QZK6J2093303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf899195bc62db5de672199c6e92cb60df77f13033ab6866378c78f48251c2e72. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:05:21Z), 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/QZK6J2093306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6705285cfbe515b9d4da435f1943a01db3b28fd7e565f14b2c3d1b99336f6673. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:21:22Z), 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/QZK6J2093311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a3c274f0e6edb63396e208177b075b9cb17dca63fa68c8d8cf43fa66b23681. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:24:55Z), 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/QZK6H2043650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f92d86a8f31eceda7003af3fffd054a8c757bbab77bbc19f9e58e5f235f466. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6H2043653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c39065018757def4c8a16bd3e0dc218a6e88903f495ab79b3886f323c464ac8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6H2043655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6885a66eaa846960ebdb221a8425c0c3bf74e7f011ac29c7e500f66b1b027b. 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/QZK6H2043657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109cf54715900bf71a44a71b801ef134f29684ec8cb09259c9d86cd0072e22be. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:54:38Z), 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/QZTAX2235168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04fd74621a7f07a9c09f89af1524e52daf9ff455f9109af787362942747f30a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:34:17Z), 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/QZTAX2235170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848c619b2162532d9b65fc371101f0f9f8ff304f8e14cc32dc73c2190325263a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:52:33Z), 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/QZTAX2235171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc402ca85119713fa47ce62648efaac1a194a5387ccc377c2a75cfb3192c4bfed. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:45:53Z), 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/QZTAX2235172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e81d9f8394190a0dd3c6005cdd33f2d9f5204bbfaf0d80cb9ab613079782cdb. 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/QZDA52325252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509ce59cc07c6eec1fc2e4ec9e4ab0779a8ecfacf595100c12e964d49cf2c48e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTBA2304282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e81d9f8394190a0dd3c6005cdd33f2d9f5204bbfaf0d80cb9ab613079782cdb. 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/QZDA52325252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f31d258f0afc392c363e97653da738eed997fe929409d31aa082a1618a15c8. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZMER2230277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d93373cb5fa494a8cd8809827160bb340ff188a2f92315dfff9121d7cf0d6e7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:33:23Z), 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/QZK6H2040699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722a5eb724196a8f2815137b73ac70174f6b37906201c9f1b65be3ea3a1de33b. 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/QZZ7Q2409536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13448177b7449d18398098a6d4bfea60661476c11413c80bd4c710a2f387a09b. 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/QZZ7Q2409534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3b4dce003180eac9c131fd9a126e552b97d125af186645b855b4e100cac6cf. 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/QZZ7Q2409535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8f02270b0ff9d9065fa820477d695927414520951fe9e26200b22b73225d0f. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZWFE2475059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27e5c5e0a99ba158ac88b70c95e44e3b5be62128e9b03158e844c8df6689165. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:07:53Z), 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/QZTB22589342.