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 0x7baede92b5f414101b79c367700a940c5bbd2a85cf0634c11b168a64ae3ede68. 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/cf5171e4-7a0b-424d-aad3-ec59d326f01e.json and https://artists.proofprofile.net/proofs/artist/cf5171e4-7a0b-424d-aad3-ec59d326f01e.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 0x9a03b767ee1cd48c5b9a8c070021a688fe916b4c2b14e94ed7614415dbabbb88. 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/QZK6P2024590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa981c393a370e3c37bbce55bbf8c6cc1a1932f783fddbd4b72b83160eac8b622. 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/QZK6H2075363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7f8a7a4c6e17552dc74de9d1e10d9c17ee15ad008b495d83cc8caf88554fe8. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZMEN2088477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836c603d7370e9068ca16fad8416c8547c1b45024f1d6354bf9112b6e9f0a5f6. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZNWX2070704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4409a4c7186bd540723e7f8ce7b8f33de3d819ac1e5689263608ff210d63429f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:38:43Z), 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/QZDA52195871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285c87a032f1a3280d37e9b9835fd0d21acbf30841289a868256d448a94b7a4d. 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/QZES72126211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5aebc1fbf10febb775e530ce0cf7bfd506595ebb1dfd947d4cfb406c11a1a06. 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/QZK6N2166480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfaac816584e367b86eb5e8f539e2b4b063a41a4f7f8d23a82ef59fb939aa45. 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/QZNWQ2142350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d78a59494ed5fc689e04b4a577b2031b48433cdbd93aba2377b197d38155d9. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:41:04Z), 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/QZNWQ2142351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389f1e847be89fd3a08b8ffe07850dd87ba7ddff3b2cb5b0fb692ab5b46c9081. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZNWQ2142352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec80c9591532d25a756c286344a79182dadd11167a0fa302aa6fddd2dba438c. 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/QZNWQ2142353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe897026877236f65985dec481ff500657ea1afbd9c259f57c63852a6aeca21d7. 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/QZNWQ2142354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1174893e5fc4e25477eee510d175589f9a7127bc9d587d9a328d86a43982ce3a. 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/QZNWY2108371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b0dd26a4eac533317b62532afce8f444148cdbb727d86aeb3c375fe43978cb. 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/QZDA42252842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dda1d480db430e78b0fe38cba9ae31e4af4efa7bad4150b3a7d0f2f59cdade8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNB2219620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022900571da7b2ca0d4fc5e3f04998e26540967c935d8a2c5719cffedeb2db18. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:34:58Z), 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/QZRP42282512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a66fc44e5d09a01ab08d0d6680563deb46ab1607a3157ed8d89e60ac7caf1c. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZTB22264543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79dda0dfb1474cd0a446a8eef1a1c87efd44b916a268ccc1f0725392cbca0be. 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/QZTAW2357435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80364fc1ab96fdb4ce94e21a8fdc571f6d3e687166fc2be10f867a33a1245168. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZWFJ2394886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9718b397631ac4d1b8afee8939bb762235528f8d21423f42d3dd7d7e30ff31. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/QZDA42466990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911fcd24734ab3d98677a9303532509fc309b78b515c2631b269bfd552124268. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:54:18Z), 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/QZHN62493302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc224d67ae35adfa5d7ae9c2592fc88f7f7060c3a5594abc1677f190ef2e52b9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ782575242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd078c74bbee8f646979eecce625e7ccea0369bbd550022dc2748eb03e28390b7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ782575220.