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 0xaa7a9d2b5e6270b2a3957ad76359376e752ce0c555cb4e58d896f40d2cc6e810. 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/2cbd497f-c20e-44bd-b778-c32d7d3efff8.json and https://artists.proofprofile.net/proofs/artist/2cbd497f-c20e-44bd-b778-c32d7d3efff8.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 0x6812af7ba59088c6d91eaf3fd9b2c288b16f3d68bf9bc23afebcdb7be7be2af6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:57Z), 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/QZWFE2372141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89500cf6ce914fbdb0fa5ca93810e5476b128c4f1f2091d2c2bfafc44d12a60f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZWFJ2334406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c72c4afba4d0a9a38510e59ab89b293e3a251c213cec05af307f58b0a40010b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFYY2404487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89500cf6ce914fbdb0fa5ca93810e5476b128c4f1f2091d2c2bfafc44d12a60f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:23:54Z), 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/QZWFJ2334406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6748aa212f4cf336d64659006ed2a1b7cc815541930cfc1b74cd8046b933d503. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFG2320335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72486ef5aae5e854447dc9f6d4c93ef5ef668524da527f5e3e4030f652cecae4. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:36:08Z), 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/QZWFE2342012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87320e344bcb3421358f5800da4c04f8a888aa2fc5a5c199f31e2f161a7b679. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZFYZ2434277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808d485b677f1d6fdf8963f0c2b1b650d30e7283cd5a9a65aff8eb0491fbc65b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZFZ42401216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886926fa61b497227f90f432632adfb53fbce1d8adc85a6db75e1031f7d18ff8. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZNWU2488699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa521680528dddb7fe8cda86e46a93459d8f4d7f5bcf722b43ff91744a387abce. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:47:02Z), 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/QZNWX2473543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d2d38210695e1d5e0419dea261509e18c29a7037590f6a49e4351e87ed5f2c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:16:28Z), 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/QZRP52456340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ddf3f0776ce1ec80065cfcd1f2026800b9faaa066312bd9ea3ba84d1f4694d. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZWFM2461086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c21e581246bb53ee5138ea28718b6dc1125dbcf06cb3ee0050d277b3315377. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZWFQ2491327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8b5c7d00714a03d1f33b4fc0922426c11a9b829b9988b8306a9280a4894ae3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7L2417308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5520fccaabb92a6ba1f3aac41690c69497d192ca7463787d321bce0a2941ce2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT3EX2416201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7046e4a6cbc7f038d8d20d3b37e240570c9e28260f8af37eb983cd379049e1c. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:39:19Z), 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/QZZ7X2494664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02045ff46fabd593da00c19894fa5822df8c2d6b5c3b06c359ebe52147bda7e. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZDA52509948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bc2d3f0e1c58bb6b307a848a5febc7497c635d9a7f5662c7a0db3b18343a8a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNC2537293.