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 0xe159f5fe969b59b3164f89fe265ace91632a97c5bf93d6bb36e48be0ee53222d. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd9e0bf5-7e16-4654-9894-9df21dc644d2.json and https://artists.proofprofile.net/proofs/artist/dd9e0bf5-7e16-4654-9894-9df21dc644d2.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 0x102e30eb38e6a5ec9807febce81c8a6bed319e9fdb43a498d60d827b22bce301. 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/QZDA52266640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263a38829c9496b0dde6f0abd3616973ca6cce980a042dd639347475d6391e64. 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/GBLLT2506264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b217f71bcfb4522627c6a757c1ba252d0a3fe47a0a56a8b13f52bc7f6c71e23. 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/GBLLT2506265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cba38458c2afc1d0fb47bc371fd25f56c8c72169959fd9079e7a7b2f6498600. 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/GBLLT2506266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbe49ef730bb15b248bf3a004e6ff9e2cc816c40346413c844ac34cf89c9bdc. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBLLT2506267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624c02e242c4f2b6a4d13f9b35e5aec8926f0f238fa5b5d353eee427836d1fb0. 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/GBLLT2506268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ae25b1a2b3d3ec1d3bc2d29f1ba15b9b2fbc72bd2f905dc5e39276b6bb861b. 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/GBLLT2506269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d96af0c4887e50975326af3cc25ed7b456409f439bdde548fd3e73e04f96a20. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GBLLT2506270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3569a1dab98191875dda9a01118d4984fb186f1397aee70707d94bccb9bc1a4. 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/GBLLT2506271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e6d2beadb14737edad331a2df5b9751b685e1c713cf734bc03984693ac2cf5. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBLLT2506272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f7911596040158bcaecb628e2cbbd8093f3ca7a1f4570f77ca325fa68c54bf. 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/GBLLT2506292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e91e1793ede7515662e3e1bfdfe98d934bbb32910141d20e79ea218a29322f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GBLLT2512223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee48ebac24736c91745d74930c88402c82daab25ce35e08da1450bf6eede4b5. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/GBLLT2512224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd78fbcfea77e0d42e60f43ac4a8fa9315499982698ba68034af7a0d3b843643. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBLLT2512225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f6dc1ab5c5e10a5c042ff04b111bbe79abdc0fbcc4a488ecd7616f71032810. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/GBLLT2512226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700b067bea0febb8050687709226e53bd668daef1a2ac7171352366ebe25ea99. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/GBLLT2512227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ebd5737c9acd825ce27d7175da3a3971e5b1fa5862d767ef3c54bee5bcc6be. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/GBLLT2512228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b242503ebe79a1ef751605e1de3beb96337ac4a9395a78e91bde7b4f1fd61d. 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/GBLLT2512229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558a0f116a9a7e9ce26b0cf75e65e421c027034c645b5def8410af85de6c7e0f. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/GBLLT2512230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296ca44f11902d4119f4304c75ed59e2e77befd6b8861723560aa841f03825a1. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GBLLT2512231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1560117a8ca747370191602d6ea70a9aa9dd4c705e9f7ee131b9899e8f380aef. 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/GBLLT2512232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84df7a1c94e2149927a3077c4df0e45c067a36884a58a247fe816c904d83c52. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/GBLLT2512233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bf06bb5c1168273d1756508820d7e1e033eaa84e1736285cde6db886c70278. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/GBLLT2512234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43e6acf5dbd0347688d9c862be0de6d8f95424883cd6f5a3f55e4b3cbf11abf. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/GBLLT2512235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e88dc7202d23f03f4aa7c4fc56d8d35383aca8ad10692133d4954ca1b89e184. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GBLLT2512236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c327840635ab59c4cf3faaa66d227c83f7d98e02f66082ef175cb823afe15b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GBLLT2512237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156ae3ab0211f57ab26d781dc622345a249321215691d8a3fabc2ef602d85a2b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GBLLT2512238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33de04ab5b6dff6e2bf3a2ddda7717851ccc3e958c7e898b5fa81ba9df64b54a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBLLT2512239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa05cbbd2cd1f6dc997fa70bb7cd29b81bed970aee0483bcc5a031957ece62c. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/GBLLT2512240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdee86e07d5dc8d224a72d584a4a115526447aab31d8b46b850cedea721aac1. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/GBLLT2512241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df3b5c313911f43401632244ae92dcb683b855f7475f09802ad947306b2f9db. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBLLT2512242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17986f590b23dd9c9d27efa2f2b6163e0afd75788fac9f99c96d50b78b146a5. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBLLT2512243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0455ece6b2fac6df81b46240b408d04aadba7a5c721dd9f4afa8f3c94adc9283. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBLLT2512244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aef22e5d98073b62c3768471c1a9a44b34df5823f87c5ab3d7864b7d59ae8ef. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBLLT2512245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0619b252076b8c39a803cff1cf526a476092baf1308e08a3a73b1c115c9f35ec. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBLLT2512246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9c8000a2ac630a4715e396493b1e0377c6463f76e3d0a3e0dcc3f5e13a4881. 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/GBLLT2512247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18917ab2d272fe1755f23e8a0f615abf1b5e4c797237459c9b8a83cde6e136df. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/GBLLT2512248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521affc8af4407e61ece40bc8bf7bed1297759f1273fa7ef80b23b644234b02c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBLLT2512249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688575dbe6b9ceb7c0747cfcaf51b4da496c58767537d2331b241edc4ab06634. 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/GBLLT2512250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fe787478be64af0ac279f3ee4b8428976f9623d1ecc0bbc90575779308726b. 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/GBLLT2512251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b643bc3ea3609354fa79bb641ce4ceb2ed3e806c970c8876c2fcf6fec82aaea. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/GBLLT2512252.