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 0x5835475ef1b26760e46d5f4fa48127639c9ef049dadc9db4b929a7866aab1873. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/156448ba-c31c-4c1c-9fc9-2c244eb1d8d8.json and https://artists.proofprofile.net/proofs/artist/156448ba-c31c-4c1c-9fc9-2c244eb1d8d8.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 0x7834f21e12f8a355bc8fac31e96de34c948c3ddc56382d90a2dce0afb0bb8098. 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/USEAX1603051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612fc202dcd8611390e13ce2df9911d5c9fc5392d6671f711ea9118843b60f0e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USEAX1603053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b810eef432cc39dc64f499dbb928ec0f6d3efcceea7ae41b189b478adde99c6. 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/USEAX1603057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6d29f1d5b0d2d4935d41c7e442a555e6bec5617c7d0455647c320ef91019a0. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USEAX1603062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd926888191ce6c0fef6242c864505d0d9f5fd6d7bda5809941314a713ed687fd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USEAX1603063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e8859ae47c3596a322b8116118ff1a8527e45a80e3249341d45032168b5e19. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USEAX1603065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf441a7aa97585d1204a4002fd6d9221e1a80dcc0ce3981490e651418e8ebe7e1. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USEAX1603052.
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 0x05a5ea3dfbf57f8a6e5918c5cfb572210a0531beac6bfbb8c0a9206c46efe357. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USEAX1603054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceff276d61341b8692cda763e9d153046a88b2b81aac2663c0110eda7e3fddb. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USEAX1603055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044e04a43a856324804aca1748ec60498fce9b2d0f8f8d676255141754658ea1. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USEAX1603056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21edf5911bf40c624fd36b331e533079daf6e69e2856a74605948b91b2996a59. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USEAX1603058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d0abb891f52957a1f49aac07ce90fc1e735a93c1798dbee32561592a2daede. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USEAX1603059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ee16fdc3a833ebef82d157ef4785b636d040311b23fbb26dd55e53cb3fe623. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USEAX1603060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c84443ea6a58f7387a656e92dd5e5fbd5f9c61cf2f45c2ef13e950b05b0614. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USEAX1603061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab393876c6c861837ea4d49b0f9410d54bc4bf459998c9668b2163518bb829d9. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USEAX1603064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf01195fe3e6bf8822705fdbe4a23fbf5388fad3f9eb26d60cf010fd483bf0d5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USQY50917549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea643463efd48611c6886a244590c07dfd44a7b07a19a4928090643780396ed7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USQY50917551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6810ee73b1d936079e967bf6247818a16f21eb2878fa91bb6187b16fcca5f537. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USQY50917553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2ee3e73fd767d579a6d7fe891b6ad32e992851983419ac834a55da767b06a1. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USQY50917547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe626612a9b9688593d9e93226c73d76d4bb177dd22fbb0b2ba6afc821ad3cff7. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USQY50917552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324cdfa5aa05aa82bd71dcdb83aca5611f56b23b6a06ec16e822be5ba5ca9add. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USQY50917554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f699b9fd10320dd43c6b1e00166f1720ba93a01878f0ec1687beea0ed1200f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USQY50823207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09558a9bd98c7e374931bef530531e90b953c4a1b9b4d17a05d883cceb2f7ae8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USEAX2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5aac3606b0188e9bfb78370edb1e69e34a0c683b48a0aa8eb0c45a3ddb35b9. 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/USEAX1603095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939fa439183925db36211d1bc4da7e71ba45f9e2b9130b5bda6c448ed4b19355. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USEAX1800174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f2cd4adea4acbe6d0d4cdc9edf3eb2a934de09d1d3f19002e9940eb01281bd. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USEAX1800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b7b0134445b0e4f3d391ff2951ab5383117530b10d9e34533a650c309e8ad3. 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/USEAX1000126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943d9c46a09d4b798b192daecb321927bae1d065984e3da2e5679de6166cabbd. 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/USEAX1602879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f4cb51b7c12e9536d01ecdf1e68aafbb150d5b7a3436614006f3d4e866eb65. 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/USEAX1401587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5aac3606b0188e9bfb78370edb1e69e34a0c683b48a0aa8eb0c45a3ddb35b9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USEAX1603095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc781e2a0662489790702224ff96654a3159905340fa240f80b74f3f22d52af05. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USEAX1703184.