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 0xdd19ada000914f13057ca0618cebafea10bda6338262be8ba177642b1cf4bdfd. 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/6b3b7814-b988-4a21-a7ac-1661ca9a0c43.json and https://artists.proofprofile.net/proofs/artist/6b3b7814-b988-4a21-a7ac-1661ca9a0c43.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 0x63944d3ca1da69aa14f6b09c11429683df4dc73baa55166986acb0aafda36639. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZK6G2035337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8bd9de82ff6adb6da391b3666d41c0c9d96d9890e296186c0f15bddaf5debc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZES92107228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d56fc56a10d28ffe9d1e10c128e5b362199a3716743f5a2ceaed62f3e48174. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZNWR2100515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cff68ce821b14790bf091722408cba446065a7d50e1cac63a434b34b2db08f. 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/QZTAU2172482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd72a72f6bcce890fb04f5f73483c95af71625fb8c595c564e2ee1d310733c60. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA42278719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7af3c20ce3a39423e882cd49f201f38e54baebe930cfb850a4fc1007e0e2d3. 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/QZES52290870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa136df5f563714453b62a786b891ad4837a1e2f0279c206ec80bb7b3dc5dc718. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZK6N2283928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78fbc9c2309b564aa66aeaa68dd96ecf00629d8345a78c5fbc6d07f2b6c9435. 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/QZK6N2282850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13285b989b6e0730e56f1a5a82ab0a9503d94c025ecd300712f8789a886179b3. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZK6K2287642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85376757f6fccd4b89f673fc96db2a441b0992a8e9d05e7f8a67f64062e6f211. 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/QZK6K2287643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c4499243f02c2ef5498928a0f7e7ab11aa738f5b1f8725aecede3cb8a82b95. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZK6K2287645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4dde05bdbec0e351cb6aefed3558e51c2abd77c5367784db1ab5eed84c4e12. 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/QZK6K2287647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41bc6b4395b86fde11537b665d0f8b055c26850a36f4e1f9b294d02b190d94a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUYG1447216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf628be56682658ca616e15fa80c33dd297722fb3a253066200baf4566061a362. 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/QZTB32295431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f9e72b746ee87a086c35cd0f3db154623c816136bdf98ecdffb47b3483452f. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZTB82249199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb724aacf61f913f435423ba1c02e4d98c824bb0eb0196da99c304d33eb603518. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:56:04Z), 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/QZES52326019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cd0d1e72983bb701096c654d4c96f87335dc32f35b8b95cce332c3f3ab920f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN72374867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8071f255002ece2cdf23888e14bcbac956dc2b563a4bcb72be4e46ba72c94083. 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/QZHN62348114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f9e72b746ee87a086c35cd0f3db154623c816136bdf98ecdffb47b3483452f. 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/QZTB82249199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5509e8075623ca31a9d0aa72423d96cbccd4c5f50eef0113f443706a202e1c44. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:39:49Z), 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/QZHN62348118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab13924e686e68885984f176018609d1c33b043f5309bf3c887a4989b107cdc. 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/QZMEP2350044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e6d0edf077a4428a53200641d1b1de097bebf1f2019318109963f7b8b1c648. 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/QZTBF2300855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b80d748c6ef2d3140ddc1be68d1a96522b92d54bbf169493bfe94bd4f917ef3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFR2338803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52081f739026aa1846b199de46a423af4e6f267bb0c8021b204ab2f048f3d1ff. 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/QZES92430159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f184659e1090d796f7769853c3b48eaf1d04337eb1f35a22d26a359f47b0233. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:47:48Z), 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/QZWFU2401285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee3fb0a05a6e1d63f4a213988bb3d0ce595b093b93fabdb0dca84ded82f3a25. 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/QZDA42587529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adadcfa48ae9c371a1c4e3dee6c7a5ffa164d163f0789af493f02ad3d20c317. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHN62599597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd72a72f6bcce890fb04f5f73483c95af71625fb8c595c564e2ee1d310733c60. 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/QZDA42278719.