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 0x14dd6ab80b3ed7a468ac40b46b61a7d19da29e48da4066aba0d12c05f55d96ed. 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/149597b2-0615-45fc-921c-e3d513681a65.json and https://artists.proofprofile.net/proofs/artist/149597b2-0615-45fc-921c-e3d513681a65.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 0xefc829a96459a6a0c43b2b2d78e441f9559deda62af525a50f931eced71445d8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMRTJ1700392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47002a709312a46e0dbc88cc57d799d8ae6c8599c694ff43d0a21a9353dedb9f. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZT6P2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f7e23ee69739e0e8a7df5a00ed9d39afcb30f11ba4c727d486be79de743ca2. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USA2P1934056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4a621930d1b36541bf49378030d893e725d1c94f476221b407d22568ca4141. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:00:42Z), 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/QZT6P2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd102ac5b2909b862fc6e22beac8c40f6c7ec09b2d2642cc617d252a3b61fdee7. 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/QZT6P2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58e7e4eb27ea2d62333f0b6e8165ca9dbf85cf061bdb25ea5f5a604f335e8ec. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZT6P2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23491e3705fce7009cce648f42cf233e77b33244ab32a82e128ea938cd8fcb7. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:53:16Z), 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/QZT6P2100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b30d9e1bde24c4322dbb19e54cf798eb907cb3d8689755b3b1e3bd2bdf92eb5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZT6P2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0646e6f18ad75da3ee96964b8e2859e3d8c1944df7f8c98d1e378621926f2cb. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZT6P2100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92570a78536270859b009ce8d4a2dd6a2f6d6c47d5c2fda0adf8f00d7e53482e. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZT6P2100097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20f6bd3168e3c053e7ccae0a5d0d585c6688d1289ebb649f31c9186426bcd21. 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/QZT6P2100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8a91859e2dd0c57b8eb171b14fb2ac6a14bdb0dd7fa409dafd37c181f8d929. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:48Z), 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/QZT6P2100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b222dd692ec6f1a1411587bcfc9dc74d4a1fe396663d4a1526b7407511c3384. 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/QZT6P2100100.