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 0xf4826971d01c6f39ff6c0c2f974015a8d6bada6372dbc2fa27439ac5a482e21a. 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/539fe3f3-fdf0-4e53-a165-967f591c8b89.json and https://artists.proofprofile.net/proofs/artist/539fe3f3-fdf0-4e53-a165-967f591c8b89.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 0xa7e3594071b171c211779cfef97cef2ba06cc8f200b97be1dccbd9035131b134. 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/USX9P2458583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27174791e863c69b9d6153b148eeb4a17f84086c91973032a453c6c0c201d08b. 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/USX9P2458585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668ccde69176221db8e4c2e9b28272ccfe4cfe99e6fec6166c7dbb303584f8e9. 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/USX9P2458588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1acfeb926960b5e814c4cab71f39506b125d0c5c8e1cd60133ddd545da456c3. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USX9P2458589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd625799787adeee0cc3992ad7c54d706f5202a78152733ffc0cd0abeeb387968. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/USX9P2458591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc1cc5a113bb3ebf894b66547c55f928ce8fddf263fd765e85a911fe833d1fb. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/USY242496029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe202ecbbc220bcf56e253a852efc51980246c254e369bee3d5c3b82408628dda. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/USY242496030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8f1f1d5f3144c8a868c8e30cdcdf5135910c255e526dcf89bea04a5d1bd495. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USY242496031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99113beb565a99218c2dd82ab6e2cb5b73b41f9fd74f68a696ada099c5d08a9e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USY242496032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75513e8231e367310241108b4a962d39035093409d6ded60baec355a0be926f7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USY242496033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7469e71fab65b711d4ce98ef3d28a5df21a8cfa401c3070fb0a65d1ebffd392e. 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/USY242496034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeade7d6de3d3b02bca33559a982bd2492d42535dc6591e0a8ccd9d26ff9e3913. 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/USY242496035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60f11bbf28f10495c5c2eb88f79a7d8e068eeb86ad846a4085adcc4d2e2c5eb. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USY242496036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d36e3968d9c9ece5042827364ec0dbe47f4b881cc9457c368ff47af1eff455. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USY242496037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4a959bc8cbbe41d991204187b0054ba9ad56e92443634e1b819b7debd0654f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USY242496038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e21a32af5fbc7511d9bdfd3214b9e0bda7011e97bc5e060f8feea071c381fe. 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/USY242496039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91edbb25944b02d20e2874e7f77a3f55dc111aeb5c7b9d1998c729dcc82dbf7d. 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/USY242496040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff05e9ac8533553c2139914c1588765986e698e57372f7707eea07a2f73a5d0a. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USY242496041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8cb7b3985b08f507e97a3fb56918bd0954b04a6396d455e35f36776c9bbb7f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USY242496042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7aa39b99422ee49ca193620dd356a050e383c2382337941101d37ac2849714. 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/USY242496043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dc1472c32572e13249ba5ebc4342401380f6c927ff9e64b7f5f8f8db1f2500. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USY242496044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ceb84bdc831a724dda44bad11d14fb43223c10e563cd91fcca3b0c5db281c59. 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/USY242496045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c8331452cbe42e82e73a17a1c856db46a87d99f965b869f79f3d2b3dfefc41. 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/USY242496046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199e09736fb596ba61cce928e859ff57e46d697aef59c7dbc033091177011934. 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/USY242496047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2047076d08bcdce30657ff574f51c7d83808d8bac40f3ce6c349512ab94fbab7. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/USY242496048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc905148f0476348bfec6a545a7c5b32bbce93c8b990da29f366193701386f6. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USY242496049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bd2b772d91293d345d068c556856501c8bef19c07a867923d23dbbcacfaec2. 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/USY242496050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cd99d153d8b57b1f296334ec10c0f96560dff20c77f0357d6149fa686f5abd. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USY242496051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3f548bfa054e088192aaa35b509c53625aa45e6349966119aec4fa58067f10. 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/USY242496052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63027241203e7fab0e07b2fd8b6ad10b8d451077462e95e763a6cb2256610b97. 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/USY242496053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5f83ac1929196f681fc9a257a8c7b7f44428e62f163123d92aa04c48ff5d85. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USY242496054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdfcde9284c3738dd18d13d50732f10b324c84de22bc81b67c2fa4e4cf6b1a8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USY242496055.