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 0x7376f1f87692deea697f3ae59584aa23bce4570810665aa513cbcf7db167385e. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47caf52d-5cf6-44ab-a77d-34806e6306e0.json and https://artists.proofprofile.net/proofs/artist/47caf52d-5cf6-44ab-a77d-34806e6306e0.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 0x1716a909445d5dba3ed8c22079584108035aeb70cdef105480436059cb84b075. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:36:58Z), 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/BRQM91800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8256808cc39a76501bac5f98a6f084e53ea581d74973a431dfa97f1fc8d5b6ee. 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/QZGLS2152774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1168fd652e2fe5f67d18fee0390fe279411532c80feaaa19240fa9e6ac37c5. 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/QZHZ32278048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce514819c91b2c3be36ca0208cf6021a99c782191dc3f5c705be43a36f039040. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZHZ32278049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c63ca2c6d5902690de36d350e2881329ea33a55991d94fd9d3f81c512f8a6e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:48:11Z), 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/QZHZ32278050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86a46f749138219d514a016717ef5b819ea0adea791dee59a6917957a431d75. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHZ32278052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7bee1a5848b2fa4802c48c5b66704d7784d7118d228c1904bdaffc5e301299. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHZ32278053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5970c0c8175342a9db0ea2e4efc73a60da1c13687e4a859340a5db1dc7d0db09. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:28:49Z), 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/QZHZ32278055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7450176b4fa823b3350108dbd7d3d37ba55ea662b31cb88adb7a7644ed7d0b1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHZ32278057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabfc741bad2e35ae24c4993a37e00c0984ee97effd2022bc6af4653292650a0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJV2410313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb79d112596a5a9cda941222957195be5f86022cb6ef06f3d4592c8ae79ba064. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZMZ92538896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d715207f27e859a7c3c2aad0f45f0fc803bf10cde4aa4551ebf9a0cb7b626a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJW2525580.