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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5858f1b591d9db5b6271d85026dbe97a34938addcda86ef9b1ead9871d8a405. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08b8b710-5625-4986-8394-6c2fc69c0622.json and https://artists.proofprofile.net/proofs/artist/08b8b710-5625-4986-8394-6c2fc69c0622.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0658c1aa7d6baede1f6d8c9350103affc192a0b0f16a1a6192251169dc6a58. 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/GBKQU2476111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec0bdaa7f3ebf323fa43a7f24537a18f2b87dbf52c10dd70a4c073e87027323. 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/GBLV62321158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa9b293a4f49455ba46ce34c1297d807ce142b6315af50be525d1195d3d81ea. 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/UKU932382045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae52cdb62c2b952608646aa06b3ba4b99be1b1884a04ab1eaa530d805480c7fb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UKU932381566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc192e76cc44b653505831789ba0fa77e517684f923592e1ed715f6ab208a52. 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/GBKQU2329337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5a08c7a991bbc46c36d24ee23c4a1597af6d65b2ec0a9a6d4a84630099fde8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLV62213367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e30714416e0a1a961f493fbf67e2690714ef531028583860a02735272cc4ba8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKACT2230495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b7eb8da9722254791f49b9870be94011a91830ee2b491fb8d7e40bb56cb5ef. 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/GBLV62131147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b9f554b7dc92a396fe44ef81f1dc090710e378bab3b7159adf8baca9992809. 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/GBLV62014057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae0443e9f972ca0eebb16782f037c4f1c72d922b3e1ad3112573822acef2630. 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/UKACT1931903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31de326d9d1c3f0d8ad7f00825feaf7b91231955fba9329469097db7f8e48dc9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/UKACT1960456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cefc24c241d534b1fa6c7f8a73a86890715b10db487bd16b2aabc10a00f8c26. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKACT1960457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b7eb8da9722254791f49b9870be94011a91830ee2b491fb8d7e40bb56cb5ef. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLV62131147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913032390940109c658d50948789383386a481804cea8d07d297821adddfeb0f. 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/GBENT1654650.