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 0xe62477f73d86452ac5a1fffafb7145e52b9afeee1bde8948632c4526b4aa6da3. 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/fb013b3a-4e5a-4d35-b8b0-15c58d5c530a.json and https://artists.proofprofile.net/proofs/artist/fb013b3a-4e5a-4d35-b8b0-15c58d5c530a.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 0xef178d7aaeb200d3ac46efc9e6867cffb922be70bc36198ca061ba7b48d318dd. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCJPP2162955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f648096fcb480e977aa525186b4cfae5acebc9271172ac2d4ce3b80fb12f57. 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/TCJPQ2156277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b0acbb356efd93f43c39d263212a97baafff32ce913f0320820ffec0982172. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:24:33Z), 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/TCJPR2200955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb5bd88db2b80ce4c7baa9daf349d14d0ef42892955771808062c451015bce0. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TCJPR2254241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bef2576481a481140b76bfae6afe53b88c55b2d83c78d5c0609d413fcbcb4f9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCJPR2273982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc19ddd13c3b10f3353d7459d381d5272ed9569eac983c92abbba7670e1a50ee. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCJPS2206290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074c0786fb36f42ab67b7133f03ac7ea809e0e74b55b7c1b2d77921bfd12e294. 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/TCJPT2249582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95970225de51b03dc0417ac6a3f974d8bf909beb72cd63af33b357518426868. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCJPV2385019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a04cbf08c10ac94a7be7007d0b679018c4a6ba8934856ba8629c5e81ccc8cd6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCJPV2385022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcace552ecf6dc45105f76b36525540a192052ba52f0d8ecc3157e86c25d92146. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:55:36Z), 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/TCJPX2301886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0ba72a27e5d085ff633ffcd36d4030211f25c29eb0caccf60699bd0856ca05. 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/TCJPX2393754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a03ddba4bcea625e6703410a857863b6824ab251335a578d0209801212b7256. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCJPZ2467826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b1a0bcfdc2c8f22e1e8aceb48bfb034e326fa98f52b5ed63d11c495ad2ca6a. 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/TCJPC2484155.