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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 0x24b1e05f6b56b7d32a9eecd4468d0f993a7236357852fd7d5fa8e84983d9b251. 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/f09e223d-f9c9-406d-827f-abd613cc8ce6.json and https://artists.proofprofile.net/proofs/artist/f09e223d-f9c9-406d-827f-abd613cc8ce6.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 0x253c150b71bfd5ab39971b23da98c808546aa8e5d137f7425478572ea4a08888. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GBMA22091886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12972baf65071560680e9c6f36242d6e32ceb472f0de23e98201363773141f8a. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/GBLFP2019556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc123c204cb488adf1da419a548e6febd41989897f6107f9ac7c18daf3594e23f. 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/GBLFP2019569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70e951a3f7036d346a333fd41b9170e18781fdf18f3f91dcc72dbfe2150ede9. 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/HUUM72100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e644b50dca94f04e0abb6724eeccf9d757f22b89a8a6102ab08e0a48b30675c. 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/HUUM72100265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744a4997e6533eae4ed0e39d58b6472d461e5ed6a8e68ba542a3f3bcf67eb352. 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/GX3Q92041420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e5e10d984914f685e210365a781346532e960602d7b679830ec20acae5365f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HUUM72100556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1006e9bbfafd80a32555cad6c16f22e4e3be59601a7b4cd95db965fde1d598. 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/HUUM72100594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69445afe1ff0507986bad819dd4e022df251273c5e3eee70c58889205d6c248a. 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/HUUM72100593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed179194e10e6618ccae886bcc393803c9dcd8eff4b7284b7b399ea02b9571de. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX762220293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd1080400e6f8321573652dc34134ff745a76bcfa25b99423d92b7842628a96. 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/FRX762220294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b38917d5d995e8faa6e6e8af81e5cbb9e813ef71322ee14ac7fdbbcb71f29f. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/HUA612203239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa593fc5cf10ab46f4e100a984acabd70d0b02844304355c59dbf539d1ade3551. 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/HUA612203240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e80684aa2636125a5a88045a96bdac3cbf4da6469c6bdeaf29252bdc926b714. 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/HUA612203243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e971239734406b9bebbbf496b83b89b3fb3fb21261427d8d1dc850ce608928. 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/FRX762442021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7951631266f203f21db03aa93fbbc9f02ab85b1ee39891639318c76428d1979b. 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/FRX872430258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd813c6b1e5233619fb804dc0819ab6ece2498377708fb32b5d85c023297adf6. 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/FRX872430259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e971239734406b9bebbbf496b83b89b3fb3fb21261427d8d1dc850ce608928. 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/FRX762442021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936b59f6d07215687bfaa11f90af6d7194f37cb64680d447071f905fe48a0aff. 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/FRX872430260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01e34da4073f6605827d520de9fd87bcdf968245324d7a53e0e2c2e6a681197. 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/FRX872430261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb39fecfd71119f07bd98bca2d147d81e36b50add70f63919791552fa65d0d0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HUACH2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7d31d9dda1902594e6747354be7094fbfb3e74c78fd8695fe1688fb38055b2. 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/FRX872424506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9eb3033f7cd5a82315957d6e1cbff0624c42c7824026e90859a6cdbe328ca14. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRX872424507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e782295fbba0d61eb4b70e00b0995b2836f7234010bddf73ee6b916884c26ad. 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/HUUM72200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66481362a155bc2fd2c8bf71a1f9967406c4920ba229bc6db4443fabcc796a5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX452406146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e782295fbba0d61eb4b70e00b0995b2836f7234010bddf73ee6b916884c26ad. 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/HUUM72200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d1be60ccd82c7db0efb5484234b3da934921b844215f2bea3d529742a730eb. 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/HUACH2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047105bf7cf81cdd715e46e273308bedb5fde4ea68b6ddb48a65a29b8b2f33a6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX452305649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e56eb7e6fd3bfff90f9a1b5c726165ca7108662945646bef7571f46859d1a06. 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/FRX452305657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5885d64fb4bdb6d93e17080fc8287ea411d5a2581ed815fff969f46f5f1ecfd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA092461355.