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 0x76dc922dc7e649eb8b7074eaf021eff6bc0f6a1513486b9bbda73849c639ff18. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9d045d7-7ff6-4731-85f9-c57b7b622ac9.json and https://artists.proofprofile.net/proofs/artist/a9d045d7-7ff6-4731-85f9-c57b7b622ac9.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 0xbccfaa33d1ba6196361addc50ba87804c0318da967478816d155830f29d98d85. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FR9W12212713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2390a7fa4c620d96917f6e9f490b30e542ac17af0ec1eab7370b4bf21fbed03. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/FR9W12213040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6eb2fd7407b14563003989e6412caed55fad119ed6dfcc20cb16cef8ddbd70c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:07:13Z), 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/FR9W12213041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c1bd65167b23f2f0397e1e806ece1daae3c69c836039e5845882492a915d87. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/FR9W12213042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abb9d038d8ecb01009935d6380f356956410335fb3bbf3aa7662931a517dab7. 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/FR9W12213043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c64f53b2d0e5e147bc92ab29686b868446be2514ee4e90738947c166c1cec9. 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/FR9W12213045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfc79271dc041b9f0e37aa58b8daccb6f8e9aa810e7bd696b9511ba8e7f10e0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR9W12213046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184829e4c5eb2463ef299c36b68841a319ba7011c5f466a4f769af00dda26421. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:24:43Z), 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/FR9W12235685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29d13deb5eb7d9e2166a29440803653248119279a24ea1e7a974bc3088bd715. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/FR9W12151531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062ee57699dce54ca234117980075f860fd3216f8ed5ed2cd5beb83a0e20105f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:47:03Z), 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/FR9W12151530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56869ed7fe42ca8663a62ce808b30f2a1eb94029f213972f9a37ff8953a867f8. 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/FR9W12235684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1838566153a20a67b7e8f141bbee935ca434ea595c8f19cce43276dc1403efc4. 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/FR9W12151532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75a5710c55bcfd5f9d3ca92546e5de9d9e696f13361d3a2c9fc6087e7fc8e73. 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/FR9W12311215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b909e916bee605366763d00591e351067e392d15f841b5145d84b773705bd8. 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/FR9W12311216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb32939a04e35442546447becd038d3e2cd222f954c27937f4cd1394c10a993. 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/FR9W12311218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1361e3627787e5c40b302151223c12d7c03a23ac8521d9a194b3fd965f2bff8. 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/FR9W12311214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2c87eaac8a7f178ff6637fd253b2edafbfd75cf1d0fbf8d3218ab75ead0642. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FR9W12311217.