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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16d25917bbded62294422d9366884804a911bb5078ad8c764b7f1cf69cc20f4. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1609131e-7e8c-4752-b17c-25e265261853.json and https://artists.proofprofile.net/proofs/artist/1609131e-7e8c-4752-b17c-25e265261853.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79549b1284cdf9b9679b0ea770d10ae0464dda87809bc15148f589b996615820. 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/QM42K1763470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef919d807334603fba23a110177cf8e4aaccd52f227b7f7149e6531a07cca7cc. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZES51999649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fa64a579a0c115e3c20ff65e9dfe1f5bc4eb6e66af37cea3e240f5c4ca5885. 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/QZNWT2570866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b06832fc0089f0bba71e1f115bc99f96c20af4e1a89d5cfc9092da55f4ef401. 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/QZNWT2570877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a7267ead3b58b811536d7c5d71eb809cdaaa4e66c5900c6d34e21b7f65d946. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB8KE1757260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c361c066c5957d4b110995abfba6013ad97c210121f209bdb78bd973ea10619. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ121855010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a59338b372111f968e40f045231373f4f0883a4ea17caa849ca0f51ad80e54. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBHLW1903474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8429c55b172392ab78d446bbf8bba0709d38a66a9105a8306708afdf592317. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBHLW2000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1648a92987d3cd6ae38b2ea9c0797aecca6e7c056e4bf13bde22e5f1b564df65. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBNEQ2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68177feb712de409c8301db29af9c1f79de5dd2b8cac5ff5dfedda78b5c24afa. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZK6M2075316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b20d9d42a2d199385b74365beba997ac1f1872f84a61c115b0e2911fa6c232. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBHLW2000360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d028c51af76c6798a72e6bfe9f9e97158eaeffee5fc7bf271bf608ac05576df. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBHLW2000361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfb606ad49df819434a27dc4d1ca3ee9f4b8b10d1bc40e9c0d6c25b5b934ccf. 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/GBHLW2000362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edb662a30becbe7c180d881765798483e2203dade48215255c0cf8458f4a72e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBHLW2000363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9946790724317e51f0a28adb347b09e3bb776ee5a20ea45fe42c398200547cb. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBHLW2000364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee9ca42e2343cf25d07e1d82f0f2122e92f1396d47d9bb72c35260db09df225. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBHLW2000365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf2fb0c19d94ffaa79ae688a3ad4d1794751fdea3849abd35da866d183698d2. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBHLW2000366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb3ad44e9c1f67573d989d991988d2a9afa26bfdd5b8d0177458548441acb41. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBHLW2000367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d68263cc137ba5ea28ad0d06fac46083ae003a02cf88e4a2609d60cdc2ccfb. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBHLW2000368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cec7a051df98ede7a181f1a696dc4ef29f0dfb7bee3e08bb3b02f407e9707d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBHLW2000369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df18c3b414acd59500f9f9a302bfb4113d8bca512cae408525b7d5521267d3e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBHLW2000370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a79b35997f6b85642aa0a9acab4fd3c114c30149b1a77951771e9978b51af8b. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBNEQ2100022.