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 0xe059720ea1b0f80abaa9666f120130b97971bd262649f47f1d8e9ef35689e50b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cb4f0dc-5da2-40f4-8efe-bb61c15953d4.json and https://artists.proofprofile.net/proofs/artist/4cb4f0dc-5da2-40f4-8efe-bb61c15953d4.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 0x91e0bdade79e50db708395a4f671ef2459cca83d4bac4bb5b22dda1b069cb8a4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BRFOE1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d387092e512d5d84548f7226cfc3547a8d3672ac558c2fedf50a4483a382817. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BRFOE1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9250c1d66999fcd07abc29598cb947eadf168d673f9b96fc9ff9aafacbf37e23. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/BRFOE1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615262490507fe8cb9d96d7810022eb657302a51e35c42345d6a0979bd135399. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BRFOE1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26146edb2bc7a4f2e98136739e68480c44a76dd89ba922c026f037252814329c. 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/USHM21603019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ecc4be8f663e3dfdd24f8a6c7bd01a8d693e4b6f46e0599078bd4f002896ec. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRFOE1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3465f3ab27d15b6023c74a19bfc7b7bdefd2275c5a53464e07ea2055dab747bd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BRFOE1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d420505c49b121fe885d361f6e95c9b2504412c99c068d64132b52daa34fd94. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BRFOE2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f101a297b2051d7fc7043b31205bbe2c5f10a34f026b0fd5ff2b2e4b5fc84a4. 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/BRFOE2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8547e031b1c7e3ed03899f573cf878accc2f39f7d1bb56e03083d4e22bfa1be. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRFOE2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6e36667c3236ef5939f87ed33d607271c06ac94b63a3e27c461ae020f4b6a6. 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/BRFOE2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be9fb6bad20ddddb19b7d3c40ef57b7869039002ee3575ef9e8fbefadd4d4cc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRFOE2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012b65460ffe9c49954e595a7e0c38fbc3ca0fac06ea2e1caea333d4aa1ed05a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRFOE2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499300af220fe73da3cda39f99235ecfb24518c12a9074a80ebf730d9ca0bb04. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRFOE2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d420505c49b121fe885d361f6e95c9b2504412c99c068d64132b52daa34fd94. 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/BRFOE2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d39575007018d66ce06e36fd547abdea0b5090b69d407c064ba31ee5abaa7a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRFOE2400011.