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 0x0bba380b2c3ec31d5d11f1b5c2cd1ee3901efd601b133f43459c4a840c1a960a. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6a73704-44fa-4045-bdaf-a901ee96dc9a.json and https://artists.proofprofile.net/proofs/artist/f6a73704-44fa-4045-bdaf-a901ee96dc9a.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 0xf9c88e0a54d80802f69951f8e169820a6b7a6f9364bbe1e685dae63d10992285. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:45:02Z), 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/AEA2L2161696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36965f63d7ebe2fd1770346adb53a8a3ed65b400e693674c7f2e91cc6f15fcbf. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/AEA2L2161697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b44bb1e771439706860bdb0cce2302ef4f0b36bf1e48c7ae7b4df0049dee030. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:25:34Z), 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/AEA2L2161699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb1decc8809b5c42deeba0bd3d6546c309ddbf4e8ea37da38fdd9ffc63753e9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AEA2L2161698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bd2117f8a61510a7b907a1ffbf26b926aadd6dc95c84706b63de8cc2d33115. 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/AEA2L2185992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a3e0771dd03ec60afb906f69bd057120e93525595ae310b2c3b8cb9b518388. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:08:16Z), 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/QZTPX2596066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a150f4d7888830f97f4185746348ab9ef7d7540fb2d3cdf5b38815f7863adf9. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:36:10Z), 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/QZTPX2588295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610e9d1bbd73a9136233df77ce840aef5b1583201f2db5bb13c6def26c1a20aa. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTPX2591001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f3ad0c7acd881cb6471e7b5eee2705c5377a106309a86493e37cabcdf60bb4. 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/QZTPX2595745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2028a82e223da0666165e73d5b80d8257447cf2ef0fa5e93f7bb91caa9c101. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:22:21Z), 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/QZTVM2512635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b2a9e4b9606bf42556c543fe2e7ab5e34365f03c4365384c716fe59332b317. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZTVM2517238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ade8e70c525d990f65a348d3205ced28f79f8688af1d299b31a1c3c82ef91db. 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/QZTVM2517242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd372cc56fdcf785abbb346b59c12efcc11eadaf61e5e1a8ff5aa681ff9680a67. 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/QZTVM2519348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f8d364f5e81263a93d94ef31ceed74869162d3e127d646453074e55644a7d1. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:01:23Z), 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/QZTVM2523063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e281071bbe1f9fba38c74c75a98bad5050b23d56a063e5a4615934c6c9b14a4. 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/QZTVM2524575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99920f0e3ada0d4afe8f6dd0f5df7db80c8062af1f97f7ef8805940289986e1b. 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/QZTVM2532809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54ab327a4ee76912351999b0f43a0c991aaceef871577c6116ff59dd064b621. 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/QZTVM2551845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1576b3a17d301675a115d27715841f6b8e899dbfe77df361bc165cf3a1590605. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:41:45Z), 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/QZTVM2551007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02304486ac02c13ef3ef7d5e0dc79533c10c150ccecb7ca519f0bf5ee76a3530. 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/QZTVM2579313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd011ff506e0de0c086d84ae0d4d590187d90a785f4feb5bb8e547fe8d7d261df. 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/QZTVM2590526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ba82a1a5896318836df65abf65eab451a37ca45c692351ad4a4cba9b36a4e7. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZW9K2501928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ac64fc1167574b524980eaeef23393d16916741efecf0d010c9b5f47dca3e2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZW9K2501940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc74a6c0f141c8299358b0a530aecf4df9cf4f18001dfeda2e8b9438542909c. 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/QZW9K2503391.