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 0x758a0378cd8d2747473a0942259e520296e437355abf565aabfa90c648850e6d. 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/d03503fc-c7f4-49d5-b239-8d259d7d4852.json and https://artists.proofprofile.net/proofs/artist/d03503fc-c7f4-49d5-b239-8d259d7d4852.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 0x0d3b6e93a5b300fdb7ee432ec77e1585a154ac9ea5e7f285732405f25a9d8d9a. 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/QZK6N2387306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e020769f98d38771bd81f86b108b3b6f9c05fd687a142c2481f6c32df06d3ff. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:58:57Z), 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/QZK6N2387312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dcff6d3a8cd3e789752185213acfa6d4ad0264722e1e4e095a2a7a8e710662. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6N2387313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0be95d6950825df898e05fa201b67f0d8d6c462730fed1e0ea8f14fb23576e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZK6N2387314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f275ef4ae5b98a0dc9209da1087eec8740598a60d5a172123a447903789d697. 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/QZK6N2387315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc4f0213498b4a0520667b4117c05c2554216c6e1f765b867dee5bad1709bd3. 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/QZK6N2387318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe59df750f227e92242382d53f7fc080ae2048b8f3432ba4580ac573fb45708. 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/QZK6N2387319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3096e2084b27a410389f4a40d4d72541ef9d23cd9661c6d732693fb67c4179. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZK6N2387322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa2573cc2af646dfd873ad1aea8327d4c9408accb6b0cedada07ec49aff4e00. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:16:10Z), 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/QZK6N2387323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4771970e28d8520fdd9ee3a59c8544b443646f0ba76d9f73edc0e66605258f56. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZK6N2387324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7a79ce60ac20ad333adeb1eb82a700e1a3ecab173e692723f1737deffac79b. 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/QZK6N2387325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557c53b5fbd8047ea0cf152868792cc058ca595878d44ba1c726fb14d5c61692. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6N2387329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaebeb04dfbea58ddd7dffeb5f29f9527193acccafb3580327c9a7087955f3c0. 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/QZK6N2387333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3be7cb799e3e5260cf95852b559f032bf59a2e1fbe11dd2a661aeab63cb0c3. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:23:46Z), 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/QZK6N2387336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585cdd5e152e5c956ae44e41354a92b10cf880aacfb41d896e5c201cef63eb16. 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/QZK6Q2362296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887a2c32c595049cf09b553030e17993608561021b6f97882df4fb7d1bcc6a1d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZK6N2344964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf48eeeaf3d7dd832e02aabe9c779d494c695894ee89eef7f2ba40546920fa15. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZK6N2344970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa054630e756714a6d9d4a9c47b6ef038531896559fdc4ec954df6283ea18a988. 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/QZK6N2344973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb526620067c89a5b0767535e99991c0bbaebb751bd55b7cbfaaafde1f5ac02ee. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZK6N2344976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9f2d75327fc523afeb3c069d67a29d4401446bc5892e3ba2c054de207b8cad. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:07:14Z), 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/QZK6N2344977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387a7599059ceda530923d6ebdf86fe0e586198db057edf4a41dc2b3ae8fb65d. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:17:29Z), 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/QZK6N2344978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53554078a2ca994ffc289bacbd81f4bd2a745a528c8066da7b7bf372570b3fe. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZK6N2344979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3669a0782fa59287ce2c500a67c664a4d0415ddf790d6d43743ced1aebc2856. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZK6N2344981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16750cbec023ba9b2967d49bd26daf955665da64ff622b9fe25e24cd2b533db1. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZK6N2344985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec01c43f058ee1ce33c84dc072a85de642f19c9d819efa775a3c1902db50c82. 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/QZK6P2311556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd6a95a4fc85b6df2da6f54392c9592c06b8a5c86e828853d95b1476fbb67c5. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZK6F2316973.