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 0x05df73e6305ecb5a879566df39f9581b03429b721ed1e2da607288b0e8a09b88. 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/bac39ab1-357e-44e5-830d-af942dd437a5.json and https://artists.proofprofile.net/proofs/artist/bac39ab1-357e-44e5-830d-af942dd437a5.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 0x90b6cd84cd05a691c6b60da838817c33797d7a7f3361b5fe9a6eca9560c83bb1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZK6P2080959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f0f9377b87f076a255ab278ed895184baa87ca9b4fd06aa6251e30a0d23cea. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:36:25Z), 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/QZK6Q2176659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c79a20003e06e2f2712ea85fb99f5ba719107887ef50ec035215d01d805b71. 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/QZFYZ2271217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488f617c73934e89c98c9a79e180a2eeb7bc146068c12d6646bc859616d57f1a. 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/QZES92276916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa891a7da23195ed248d7853579b476b7d0e39c7537233a673c5b9e608a4df6f2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:46:38Z), 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/QZHN92234315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e0404c4417478b23bf6b27e3ca34c06242ba8d6927ce78c643ce81c43cb220. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNWX2295807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f73da46393663ecc9d58556ab9eb52e5c5233cda1e0bbd86166f39a904eb37. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZES72387864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2011cdccab777b40334a331fae1446e5d6c97fdd30cfaa1067e3018e57a404e6. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:37:34Z), 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/QZK6H2348065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c87748692fee791b2133643dafe058b96b1d72603ae80c7e632e13b4db7e6b. 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/QZMEN2326655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831ae49f78bac4979d0f0c104bcb084cf9fcb321fc03ced573275888b13f0cbf. 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/QM5LC2300198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ba9dcf070f4116c5f9136b5b2cdff800a3e1ef3a3d0cda46dd3d842a3b97cc. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:39:34Z), 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/QZWFF2342601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c1c0dcbae7511a146d273b541f0d31427dfedbd92352483f71f57a70da3a18. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZHN62473661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7890b391e5216c91169aa795aef3894df901361dbdd19aa1d1c8aaf704d59e5. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZHN62492235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84193b5b83aa6400a3ede283d63ae0837e438f74964106c1b8b67d711557161c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZNWY2414226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0fd58c9e324bc1d6f624e5c43a9dd010a102e54874bfab169e8459fb474b95. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB62446389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485b6af65be8a4379c66328b78ebbc3d7fb1d8d19177919f0559839eb03366d8. 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/QZWFS2494567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35ee048cccb79dff76462c02a8252104a8febd7f7ef677a6551edaa4934611b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ7T2435710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da28828308ba3d6da4d1850b825bf1690ced63d3eb03f29688ba0d88575925b. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7P2568998.