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 0x5e819deb9372ab65da6b42fbe4120643f76713609a9b57788c5e8717c29d9949. 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/0106a28d-a5cc-4cbe-8e3b-d82d348c6de7.json and https://artists.proofprofile.net/proofs/artist/0106a28d-a5cc-4cbe-8e3b-d82d348c6de7.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 0x9a86b126523b7b422c0b67048a75b0c72c0c49e369d6de4b2b89b7d81e87b99c. 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/USYST1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848656de968ad0844780b11ea160c69dad2edae9f408454009958b2ea60ed584. 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/USYST1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ec9702794dd06b27a44e31e998f91aaf9b9aba838e36ee719901ebe8c34885. 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/USYST1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dcedc985402f10d58849797b7468f0286534d3dc2dc09173224b3880f19faf. 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/USYST1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0c841a6f322cf34563f9531f233071b8f9f11b87519ece36606b9e01fe6621. 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/USYST1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08eadee2d2f1aaba0b907756ae8b507864f4fdc352836b58ba0833424c526ed0. 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/USYST1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9488348c603ff77acf3cf88ec38c7199e5810173cedc4fcee47cb98cc22e1b. 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/USYST1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06300eb5beeb9da9fc0c8fdb92be70a8437e305fa552fa97fe9523f1b0bbe09. 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/USYST1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5454a140db528d35923a26aa87a961e47d6aad0dc850ad1cddc25f51f952c0b. 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/USYST1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3e95b3797745b41de14f95b3f60f8875c86104c5a196a7def4dc3f00ef5ddd. 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/USYST1300009.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285cb0c5dee7623515d170318d99dc3041f0f8c9b87bc2621b81ef51a06749c0. 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/USYST0700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d735353959540e987850a729642eefb24d0890f904fabe3e7bf2cf88841703b. 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/USYST0700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068f7ce6175003fa67c11fb2cb1259cabae17da1ccd12cc3dc20de64a172c322. 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/USYST0700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547902afe031543af309035a623c28d47e8af37549ab00a1d987c24cd5c62e73. 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/USYST0700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8155fa4a3c745cd4463a2336e83f64a08c40964deab70f4876aaa4ba5e16b49e. 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/USYST0700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfbcdc769e6e3da6ee5e95ccec4748f30e73881e1a7f079175a8a3c1614119d. 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/USYST0700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f14e128863aa7e99424d200a9fd8653c00775edeaa51c67f88f24a383730fe0. 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/USYST0700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff2f353faa0b89f7c1cf234b24ab97f56bba54343e670e2490f11df5b7cffe4. 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/USYST0700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fd9158f465dbd4c5be8ea1291af9ca1e3ea1d0f967bda9ddc2487357693330. 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/USYST0700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f93622bf3d60266148167d7c80609b70ac48a1a72a7b2a169ad775f04f34a0. 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/USYST0700011.