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 0x2dabf332e649e914cdf1a3154605f304d8f3d2886ca14fc85d48adebd1808771. 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/3ed71cd8-b429-46bf-b7c6-521f030ff59b.json and https://artists.proofprofile.net/proofs/artist/3ed71cd8-b429-46bf-b7c6-521f030ff59b.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 0x7e2eeae878a6ae572b0794d8799163c341e3c7bee842381465880c14981b6ccf. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T11:02:15Z), 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/QM42K1810075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f3a0fda7c4e9e4c52bb65dd2445e85bc60c236c779efbd6314f4f13d07889f. 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/CA5KR2125292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7299712ccb44bd8ac3aa74ddfb67c2d001ef11f9e9b85e90b3e810e120a6b627. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/USLZJ2122102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f47ca00ba95174cc775477229b776f5ed9824ae2f786fcb8e3916051c51dbdc. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/CA5KR2249051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f64aa506739f89e5722fb2594b7daf612596a4bdca74db2f707a40b147deb8f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:00:59Z), 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/CAUM82200309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6331ee92f60d1f20190d5eb21ecb1e0f6e119a5532c262bb59e3188f0a9f0f. 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/CA5KR2293943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9344d02f614040bd5de14d9207307d58e34a13acc111cd176b57364162dc3c. 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/CA5KR2333513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3f8d94c43f30b3ae744cda527a3d230d160fd5e82b1413527c47879595be36. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CA5KR2379508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6b65babb7f7135b81971e669ecd4ab5f0a10ef645f8fb58c5bc53d239279f8. 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/CA5KR2440365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e92966f2aa388903530af4852a3677218a2d8f297ff24186f32e2b415273ce7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QT4K42507090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b5f089b429786d276b78d6252d465f4510c4ab8f83b2674c4b972d1b24e22e. 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/CA5KR2105904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc110e4c9e05e3ccdd280a406a1e27c2c15c9ee042999ec42bb435e05a5b63ca5. 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/USA2P2109850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7511bd66376ea0a5b4c6859609fd6e5acee5718ccb478aec6270c184f8c9dd4. 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/QZ5FN2133512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4043bef2e129440b65dfe307d495bf1273ec8d3c51f7aaa20388422338994ed. 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/QMUY42000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ec85514adeb23186a2bebba8e7547f8bae2549bee7a72fd6334b41021e2db5. 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/QZHNB2020011.