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 0xe4c5ad60fb6a4256f5fe64259f922c9bb26163ae798c8e711a6fa58d22c6c6db. 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/2144357b-3b4b-45d3-b781-5342e43fa730.json and https://artists.proofprofile.net/proofs/artist/2144357b-3b4b-45d3-b781-5342e43fa730.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 0xfb0386726ce77e852efe27d7cf3369d48fb6c44d72720d75094960b6a081f2e7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAZ701003113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5960a0bb42d838b95e7cb6e690e75d0bd578a476d564de43e76b4fe0e0c327d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CAZ701003114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa992c752ad40c47a7d93dc215a83c982ce74778cf47ac8008e0e16e34e2afca6. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:18Z), 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/CAZ701003120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b40551012caf717925c3bbc936bc8ec4db0affdda9cb3b0fda2274d59b26d39. 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/CA7GA1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadbcabb112414743b7c9484a7bb49b492c7c8a2a47e6bcb6d2d7cf97d0a176f. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/CA7GA1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6b916cb3ac904bcf6cee4c1ab100ebd7c6fa980143607588fe7d36c354fc05. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:40Z), 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/CA7GA1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd321ae68e203cc3845d5f52d937dd94d7e886ba1f35e95854f3ff9992365397c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CA7GA1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef8a47cc5bad74786e14ee6eeaefe3380317938a42647cde075b62d82102e2b. 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/CA7GA1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa611c11768bb8b1c8a59ff3e10f318727b5d97bf41d22a0a21ac9f855d87e65c. 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/CA7GA1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5981d36bb33a7beb9524e1ca9514e6fc8604b2a9c5769436053fd1b1ec7ff0c6. 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/CA7GA1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a9091d0a87538ab072606b0b6d5dbd6437b29448ca6bfbfd3de5a9930b1616. 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/CA7GA2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80892f43fa8224a90aee8e5ab31b6023b2528b813a5a4295a7d2b726560cf78. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/CA7GA2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80892f43fa8224a90aee8e5ab31b6023b2528b813a5a4295a7d2b726560cf78. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/CA7GA2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175416fb88cad7875fdcc2cf3b538153023860aa6c131ec59af33610d94fd137. 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/CA7GA2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4ecbdba547cad335cb3b845b0bd67030984d9c97a6b0b262bfd9a38dad8102. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CA7GA2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820d7bbf236e509d6f1662427c89743eab09229324631bdcd156a70bb15078f1. 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/CACEB1761562.