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 0x02108142d2c52e311434c677d0f1722801e9966d3a8cb9e07e78c6ef982c6a84. 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/aa5a32cf-557e-4599-a0b2-f0e177d57249.json and https://artists.proofprofile.net/proofs/artist/aa5a32cf-557e-4599-a0b2-f0e177d57249.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 0xb43cc1d70bd335a52e5e7aa74637115a9e430dfb621e6c64c20acf617cd0e29e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USCGJ2233818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe762ddd0df13dc68664221374308583772990d0c02cac0ade3154459239d6f4a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USCGJ2294295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98047475a1b04fae9913caaaf8edbd5d8a7eab4f4c7d6eb776be8e6b79fda156. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USDY42294200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f185a160730c5e40ebdc7c03e728a8bf1cd22c8aaff24389f25a8e93cc3e45. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USHM22200837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6787d59d928da175631931b752c39c56f9f07b03c77d67ae56fe06abfb42118. 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/USHM22220361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a89a4bf4a71de859076c703cd96cf6b7e72a3d2a34f00ca080b15a6fddcb921. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/USHM22254702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa190d107965063a013f7ea6825fc356fb8966b071ec82c0c68c519d0dd897eca. 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/USHM82242582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c9f4704bb7aba4093abbb24f732beb0e96483c313caef358be476b55d4520c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM92200442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9cda378530c438e6b20292299e5683983fc2c5560dab8386982f18a427fda5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM92260772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73458008e8143a56ddd8453ba994d639c2bbbdd96d843453a6363020e703b09f. 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/USL4Q2208767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfa5a12254c7c88549f55a6626c089e8468cc41752703f909ceae4af8adf9ee. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USL4Q2242469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01074e65d1ca92dfc6b70ec11ba9329fbfdbca39cb106410f34c4bb7a6c364a0. 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/USL4Q2293802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072f6b8de2418e7f325fb439416270a8549dd00b12ff2260c8a5f5b89a919648. 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/USL4R2257665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adf5b31878711ae6a1e7089f31d74d2b0554a5e23b7e79b7c8a1dc7c0cc9aba. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USL4R2237694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfa4c6a589ab85e60f552dca238dbb44cec6da55e5be2f60ad32245f8e44927. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PL2DY2300973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd296000e884cacc638b9d1dd6547a10ead3bad80a3ba8b431ee7f686ef46e4af. 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/PL2DY2301038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e8e43e4b2a44e7df79dc08a424bad33c28ee0153edec8546b47d0244c1634c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PL2DY2301235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100024461bd3703b8bde20c8ee30e39d72d287176631200238c939d290cc8ba2. 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/PL2DY2301444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed6470bac3d171cf88cedc178f70df8004c56fc5ad64ad0b8bc0ed509593b99. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/PL2DY2302008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c516cf5cae3e79dd879d385b1b049001e22b68441659abd3d2adaad096872e9. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/USCGH2430259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b08ba4c97dafb2e728be3ac960bd8a1782aa3aa4f93d582212316104e314cf. 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/USCGJ2465472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f797bfda14a93097b83bd1ff4e56a3e1600eaa57cf905c90bf98abdbe32b6b4. 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/USDY42442021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76276e0615a8c83096c69706fdfdfbf730629b71304026af37f45c3a125c8dc7. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM22429099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06558584c4432041898554be7e52907b52350c0f87970106f2f4d1abe9f8d953. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USHM82428860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857d520bd308ad03a2026d92ee5559a4d22be31ee963850d6e569f460d44e554. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USL4Q2425183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eefa7f6a46cfb06a82cd6934a59167d09c0c19b40af987e08e1059ea28bc3dc. 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/USL4R2472624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa784f2e0312a97beb53d0a82150b812128fed81840822535f09477a79e32028a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USX9P2464302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fec49c55d2a31fd3b6b3732d242c7fb88a26ca09953bea85d790d58c74df88. 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/USY242495692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f89810e7685d6dd628cf3920b4a3e446d2a40fcb97277f8c11b8ebb08d085f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCGJ2520996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abeab1ec97776da3f0db9372c16bac9bcf2af7363a72b93e1003ad2c837e5df. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/USHM22536828.