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 0x7d9e90bb0a14e11d7e611f7ae07354edf6dc44479f0f1814ec24909d6a96ac44. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a842c2a4-0f85-4663-857b-d0b9532171e6.json and https://artists.proofprofile.net/proofs/artist/a842c2a4-0f85-4663-857b-d0b9532171e6.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 0x04c0c92e00f58ccbd53666435c3c3ee8f12d4d24b1526bef2b74b0b0b1d81704. 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/DELJ81804264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73d3346f56796b894f1aea1286a351a5e5445434d3a63b56585ed85a3f7c907. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DELJ81804265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d10d03f51234418f4a50639817983076b405d46128f5e776aab5b705aee220b. 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/DELJ81804266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0ee537e92d642f3debc310cf0d829cec6d83e2a21578cc0929b0ea3791e91f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/DELJ81804267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a19c1e1be5ba5e34c97c2ea5969a6ade9de456b43b8e4a4610c891830e625da. 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/DELJ81804268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4f8e14b17c79c84b15a22cad520614c305c25591b06a8ce2936cf0a001a73a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DELJ81951800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fee81698f5048c1759ad2b2a426864dd683cf6f51e987193fa2a453ec65a54d. 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/DELJ81953094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac7805577b682950aeeb3b18b3be2fbabc7aa1c056d2925f7ac3084eaa5edd3. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/DELJ81958638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fc63ca4a851cc4439729b5b5e27ed3beaf3e67734deca7e704e92e5fd059b7. 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/DELJ81962059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefff548f95c1f3d0b7d618874da13af4583c0ef23d71e67f5f547272dbbfc906. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DELJ82075156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04967dc5b93bbcf4313726e706a81c34fd3131dc9d268fa39b3964e064fe1a94. 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/DELJ82029378.