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 0xc8f592f224765c935b1e41b2257ddc62d87806e2e896c4439aebd89eccd7e71c. 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/878148fc-2f58-4606-a12e-c92eddcfb8c3.json and https://artists.proofprofile.net/proofs/artist/878148fc-2f58-4606-a12e-c92eddcfb8c3.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 0xfb04bd92117c18927b7a08c858a9a7325b7c6ba4f1f5066022b2afbf7b8e1a35. 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/TCAII2461453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac54d7cfb1767f821e3a8a5b579e53d9c4a10065bb3cae5429653e348822f0a9. 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/TCAIH2461455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aff04330a78c6bb782a8a1dcb5ae0f24decdaf8153a45b49890e71459447319. 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/TCAIH2461456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c88f0f38cb2c8641d583d51f0ea6c55f498b806dec9a5c66e642d8f620f6cb0. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCAII2461458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38d44fca5e13b0b76916ffbb67ad233b62ad46a083731e561583eeb7b4dca15. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAIH2461461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf021958ec130e451c75cc97962ccf5bbe60fedbc4e67b0613254bbd159b07ef2. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/TCAIH2461463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bf569af2ed78fa41f7303a9fd9ef04924e21d6ad97ee6142567752154cfd6a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:00:35Z), 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/TCAII2461465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969a2dae8bc3ac5487fcfc98b5c140aa31a0709d3e9a5777b0abca911d64d3a5. 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/TCAIH2461468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071ac5d633c1ca0eeb9426f1d197db83cb9ebbfa97d553c3f70550c6642efe14. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAIM2415272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b12cea9efc8e6d4f92f2d0ead8dbc29eb7c9ca673d4af0ba9dbfee06a703a33. 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/TCAIN2415274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b4de20ca506447a126a9722c8115a7df041f7c168b782ddb892501f2e89203. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:44:47Z), 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/TCAIN2415276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ca00460b1b9f4d97ba2b7174773ca5e36dc04472adb68f52b334c2ec0aaab6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:35:45Z), 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/TCAIM2415277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214b38f905309678573a9d6ce227545ded1eebe583ecf89b4ebb471f165cf0e8. 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/TCAIO2415279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f36b16d8e7e232c71b605d224f122167fa7cc3f0c9fe79a5167415af76ce2e1. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:25:59Z), 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/TCAIN2415285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa724be2102839ece183710ba5c0cb4a98c4f9cb2c4ea7425b35f0b3013912fb. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAIM2415286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f79f6e09fe1e5a21fc28199cf04c06a57d8720ed97813330cb062e464a240b. 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/TCAIN2415290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2607e67dfd2c6f40651c8dcf8437d6676cb7da3a4e927a6e648c8bf64d125b. 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/TCAIP2492842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a2eb6b3697b5d2ecebc6982f598610dfd24bcf363a8201b48679bf7f7e66f5. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/TCAIP2492843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120c71078c3b10761c6fd21e2df04cd44a40da77e96232ed1c548f4933974d9c. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCAIP2492846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56039de74fbb543e1aad925045a091a88e2d9aba7b9a0c1f2305854e4342d4ea. 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/TCAIP2492848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf551cff70862b331b6e2da468d73ef0ec84c33cb11e5369181cc9c1eb87731f. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:22:25Z), 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/TCAIQ2492850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84629dec3aa280f564c7309245390ab90f290fb80b658b1916d26bad2333998a. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCAIP2492853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dbff1a1eca94cd60266f656d720048464f39d27f5e90a464c3a64cca19cdef. 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/TCAIP2492857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2816ac4a706d9baec92a5c7347f787c336bb6981cc244b55ef3f28db6c0a045. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAIQ2492861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0773a221a024e6dc9c52de57086c347a09a12e07d98655e4e9f6dacfab4ed51c. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCAIT2499486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb298a2498c866a9f712c00288b1bfc3609e1449f86d99ec023f8fda1f265ccac. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAIU2499493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81596939101c5e4ec9d6fc3f4edd74a84991598add5a993541c46a4c8fda1d8. 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/TCAIT2499497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab4f9f8487c39ff45386e7941f5c4eef7a7aa85eefdae76270c6f2eb32f2f05. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAIT2499503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe0b7d61ff30942f3b00c48e6145431ead4c5f0a0d45aeaaf57b06463bac474. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIT2499506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab197a815402dab1056cf05c0894ca0697912e7909773438379d36c24b84c88. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAIU2499515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893e590ab0b4c093ec479f0fd7ca86d3f418f04ae37c77d7ccb60e26f62fddb7. 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/TCAIT2499518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9689a419b97c9442be2bd5901807027193d24ccf7ec8d4d92f609afbef41b0eb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAIU2499522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e5b515b851049ca7137b23faae11c66b64ce2bfc1160e0dfec9fb71c3a929d. 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/TCAIV2405337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a02beab92618a5d5ec3cf624e5ffe53a539a22425766ebb7a14901ee4081376. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/TCAIV2405339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5cdf3ba5d1b026ff5a7dc3ceb63ac1481ba85e870f3aba9d9e1c1f04020b72. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:42Z), 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/TCAIV2405341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182b9ea198dd9845cd89a1bf19c958c3c666c8dd3482afce2b2cc35da93ed18b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:21:43Z), 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/TCAIU2405347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee02997fca371c32c84b9111203a5c3c5e75155da6e59f9b9e8cc9459bb74107. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAIV2405351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34935ab0dd1a6850d2a11fd147164d36c737b29c1d59e8e020e7eb8894d3b929. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCAIV2405352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f55c4f33fbd33c2234e2e982b1c32f7a81be474f01cd1e863c0c8818fac11c8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAIU2405355.