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 0x61d06e3511e47be7a63ec5112e84dc0ed1e8be8a013c09b9861a61a1c89dd1b0. 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/39c673d1-b0bc-4d17-ad0b-6c73566182e1.json and https://artists.proofprofile.net/proofs/artist/39c673d1-b0bc-4d17-ad0b-6c73566182e1.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 0xbb772da48c80e6a09afcde0d929118b049c48fc4e87d39298afffe7125cb9f61. 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/US83Z2466050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25be49649fcc058380a7741e4be41028b7669bf829e1fb18a6cd4fa6b89c122d. 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/US83Z2315013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cc6b25149542815b938bc9d5890f629933a6cb263e63912445edaf6160e2bf. 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/US83Z2315014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb8d3f054b0391e9c322ef46443416eb29aa3615fbc05022a2e4c50d26cc71a. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/US83Z2315016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a049e074e3dad247bab66f202ea44c08b804a6be6bef4c9a2810ad02a18ff84. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US83Z2315017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e688c1db99be0e58ecc5846bf789c97ae7d2134cd95871144235e4c25bb7308. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US83Z2315015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf989416d5de2d5a77572b24d667d8ff57d05e027f54c28418205de0f189cb0. 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/US83Z2478624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394c19e64295bbf68b6a62482c5b8b00acdfe8a318a9351e6c7f07a26017eb4f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLV61622417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf989416d5de2d5a77572b24d667d8ff57d05e027f54c28418205de0f189cb0. 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/US83Z2478624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb27efd2253d5ceed917fe346d315b57776ad4b241eed82c2186e146b73588de. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US83Z2302103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e688c1db99be0e58ecc5846bf789c97ae7d2134cd95871144235e4c25bb7308. 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/US83Z2315015.
Uncertain Affinity - Greenwolve Remix - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e24162b94795377a8ccb82c1e0ed01cc7b3c608cebf8c6a56e1f40991718815. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/US83Z2345141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb27efd2253d5ceed917fe346d315b57776ad4b241eed82c2186e146b73588de. 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/US83Z2302103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5c97a128087004357efea0281c72a5aab6bce752c963c15a6b557ad57d7ee6. 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/US83Z2491180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3222c76c4b5443f55271758f130cd7a977e7b43ac8e3017bd5884ced7c49654. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US83Z2491179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc216a7ba003c2ab2444e58f191cc4eeabf4a722f9c0e5eeffb0e072deaf0694d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US83Z2491177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a57d129406ac61471465384cd9215bd9384a850d5807f0cbe84f4bc571e74b. 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/US83Z2491178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8421938149f7429ea0e02e3b132cd39ac3a359bd21169e119641c6fc6cc2fc8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US83Z2491176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401978eae21b056323d56b6068a8547fba2652c00fdb3b64a36fcd346efedc09. 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/US83Z2471348.