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 0xf35351f86c0addc06a97c6c564081268917038e87e742dfaf9b94f6ff294d12d. 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/2aeb413e-81e3-4797-8938-1f8d3c7d64ed.json and https://artists.proofprofile.net/proofs/artist/2aeb413e-81e3-4797-8938-1f8d3c7d64ed.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 0x88b6248ee96255c3410cec06b0410755c4bc1bf09816374f447de737a11688a0. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:51:33Z), 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/ATAB51700131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc6a7c60eafea4de7d553c1d62440596910a23558d0d5e6e71f5481d6f08185. 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/DEQ022009956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde85e6cc55e63488dac740c4969bf3eda7e6e5b71dfa7d7b016d36eb07fe7509. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:46:23Z), 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/ATAB52000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9955ebe02386535cb254a07770a93963836c6988679f5473240f6084021a625f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEZC62140116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4ddcdcf54788e9e69e80b13c5a2bc68fe4d3454b84bb6cbfb2d324a45be98f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEQ022290381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9cddd220b3d3e09ffc0a4c5ac79ccf8e3e1f78698b2799d04f413de0cce127. 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/DGA0Q2327618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4ddcdcf54788e9e69e80b13c5a2bc68fe4d3454b84bb6cbfb2d324a45be98f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ022290381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d60937e8460f5028dc74e36f45e1c63a40ae3adda35a2aeb1bbf48963df05d. 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/DEQ022290382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe4f5dd06be007392e22393f265e2d38acde363c2951ea4a012c4e0f5c85364. 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/DEQ022290383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f30e2e28bc2086b5c6b41e58d34c625fb31eef026f4cbcdd5b5eefb7b94a47. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEQ022290385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08decf331f96a0489187c7daf284c08713d28d6eebfe13c050cf7380cfb20588. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEQ022290301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611c682cd51c6384e0e92461c9b2641ca01a568337bde639b1d6609c0509d7e5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEQ022290387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5bb227be8ec06a280ad798640a3671501cb0fd21c19e7a7be0477df15181b6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TW2285568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8495d16a4505185567125a3c2878d386bbb16c1ebbdb866f36ef2cdf19f24df6. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:25:07Z), 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/DEZC62387465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d93fd0fad64c61d541ea41ce2d7cdd957a92e73394ee1711fe7882e0b7cade. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:11:10Z), 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/DEZC62495660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3610fe4fe08830c153f54df1d0c6cfb4e3827edf23f1061518d4929a8830167. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:19:38Z), 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/DEZC62517921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b06607ac06c6031ea6b437b67beeb24af5db3d4ca6bbf7d77c7092e681d80b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEZC62517922.