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 0x8299b93edf2ee8c771216c203c8c70bb50abf4f27d30dcb2c79df58cf3f8b1f1. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fd21982-bb08-4bac-84a7-2547f30c48d8.json and https://artists.proofprofile.net/proofs/artist/8fd21982-bb08-4bac-84a7-2547f30c48d8.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 0x90e24fe61d013887e59f5da66e7b14b9e1d38ec294a10dfa8c6ceefdeeb4a315. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM91045532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6b9371f3a889e70c9cf715c99c1919289a9422572d8ae0a30ed3aed3da425a. 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/USHM91045542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f027365feaf1979fb5e32602531d0ab3eb16714dd8b4d581d8850507852842. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CAIXY1800001.
Will You Love Me When I'm Old and Feeble
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9156efffa53dfb7374b503b33955dae6f51cb3a53ba42cd2ea8ac0e8dcc05e6e. 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/CAIXY1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6209fa32ac9f416669fb195f94135be50326a5313e659410f836dbc8952c66e. 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/CAIXY1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962c1b9f8a01ce8b5c935e0722d8d9b58c00eeeabde2aaa32024b3c09d6f64f8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAAE20700062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2d8782647c94ce8587628b0c7ab74a063ba2b5a6a9193790e0fa4e661a0858. 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/USHM91077461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f5d00ad358fb1fdbb9981696d5682618ea09de8103b4bc1285cdd3dc6f0673. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USHM22367563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e40e6f88eb73918a11f256c360b4e67cd48e8e7990e657033a30f8d3d64d06. 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/USHM91085518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddf29f0e79957105030c108d797d6029dd35ce5d72cef36e435e33306311969. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USDY41667904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd905cc4cba776766de3284b005a25bcd1633c2b017b2e2355343833a2d9a7c10. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM21154895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd125c4833fa50c4dbfc4f1d42a6b218a4091a62bcebf085d3df7c3906d328c. 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/USHM22107198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bcc74384b254eec0079b22bd404fe7fa308c32a1ad9790c3828ecb55e48ca0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM91083195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef324030e3d8130f7fa8444b22aae578a5bb35d723ddaa58e28c14e1cd40f172. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USHM81446144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc197d3768f4314144de3e42163c480c6fec0131285db77e4dfd5064f239274. 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/USHM81446155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfb1f6ba3e512ab56e1fb42916e7951d2020efe1fe19f4e506ddb5d58648321. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAAE20800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7468d83c4b930d50223fdcfa5f1626bcadf3d852f4d83e6abd4816365cb09337. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USHM91046651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c63da0b44392f68dd06f8fff71bca6829ea8987cda98ec49af09e377da05ace. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USHM91046658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4bb2f7d92c588170743a0454affe9c16e386ef0db78f653b3fc727b5af4888. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USHM81201284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf89d3a27c3bfce4681b7d3d2f18fec138f6294c5fe3920eecd319e54a3a33f1. 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/USHM81440824.