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 0x876459806a31443c1e758d0ce0abb36f10c93cb709568a81b261437c5e6f69a6. 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/d4eb1c68-3655-412d-a0dc-45a460c7e668.json and https://artists.proofprofile.net/proofs/artist/d4eb1c68-3655-412d-a0dc-45a460c7e668.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 0x6c0162a9cae7ba114e96df996798c273212a468e053b549e6a22b877bfeac358. 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/QZHZ32081597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0474c48569402de44d80fb18baed60cd79c6412c888f28005e7907af32ad8dab. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMZ92093910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2f45badf54e71a4ac272eb31c86d2972d5eeb4f5e33dc7f05c3ef62a8f7e61. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BCHML2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d85caaf8917f36913c16c18aa74a2544bc8cd1b02dfb490aacbcb46e2bce59. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BCHML2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6c16b4fe466e6e5702d2feb68f6a4e2fb14d4f8d0c7ec56fc1e5e24b9b442c. 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/BCHML2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6542f238f0661e0c9636217f5d47d52077a266a16077aad4c715d6a5a96207ab. 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/BCHML2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4abcfa3aac9b84f3eda4be4d760c02c20556b61b341b08c839d60c6fdf910b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCHML2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6c16b4fe466e6e5702d2feb68f6a4e2fb14d4f8d0c7ec56fc1e5e24b9b442c. 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/BCHML2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1030d6e67d4615d654d1847cb79ab4c118df7178e785adfa1b136d3e6480188a. 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/BCHML2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e0706ed5312e4f4be252a8c2de3c3a71f1a3313dd555597fb3e091be7bde3c. 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/BCHML2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d85caaf8917f36913c16c18aa74a2544bc8cd1b02dfb490aacbcb46e2bce59. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCHML2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2374d6f16f11c9d0f70f40a762d245e8880356c991076fd839517626fa683d. 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/BCHML2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebf0375844babba19b53035b6ef361f95f1a6d6c76b70774fb6664fc79c6b5b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCHML2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71bd8a92dbbd88d71a4d6868fde8c7108f843de347aab990ea49ff2dfb17a8c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:06:04Z), 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/BCHML2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a0e977a678c0769ba1abfaf2444b10891e350b33065676d505988a41ada475. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:34:13Z), 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/BCHML2300201.