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 0x53f6934ec0d2a3b36750f53b2e8c2443a2b3b93ab9795ff83c198ba04487f467. 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/f6aa0edf-dc71-40f1-a6f6-5aaaaee73029.json and https://artists.proofprofile.net/proofs/artist/f6aa0edf-dc71-40f1-a6f6-5aaaaee73029.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 0xb937db16a5c373ca9939b1eed9780ca0beb2c6c1bd5e3d99d0c056e8eb1545a6. 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/NLT2H2400377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff62e583d03cf89748983ad452057d0437608b5bb1c500599c10c50314258c4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2400376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e1533f0bb089c81df449cd64f2584a1cc9e3f1a5e01fc72c58b136ab6b516b. 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/NLT2H2200351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4641bc3b778513fa19b136f6402d65390ddb609279284cff08665e73ebdd3469. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BE8LH2200121.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4641bc3b778513fa19b136f6402d65390ddb609279284cff08665e73ebdd3469. 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/BE8LH2200121.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64455ee83c3258ee78c0cbf3cbe3ab074249eb7910ecff68dde6b0c36068ce15. 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/BE8LH2200119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2220643f4fb8d724e85a371f39af03344bad3709f1a101a9a6a4a724488a13. 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/BE8LH2200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f63d334c07d9f42ca2614fe92dfb8c8a93236c485b0a76ff6ef41318040561c. 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/BE8LH2200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4641bc3b778513fa19b136f6402d65390ddb609279284cff08665e73ebdd3469. 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/BE8LH2200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790e8ec239b742a330d2c1f2a454ac83dc8a93324416c4bf6286714518149d54. 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/NLT2H2200761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa5fd2162634579a2ba5d03b5d0f1ea51a55ce66c7686be42d338e8e418cc77. 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/NLT2H2400378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822101b46072aa47f5be6a3637de93a3be486e0711d5b42e507df5821b066396. 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/NLT2H2400323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c4fedee70ab125b7a2c1d79f0978bf56e4b8792fe7fb68571326aea0c6b647. 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/NLT2H2400191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad53e773914bdaea38d6e48f1db1c8c515e1b4b15f36019e16460ab67e8a214e. 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/NLT2H2301146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744fe295210337078f225d0315b3294291cf37141ac4777f6f1a344963e49dd4. 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/NLT2H2200386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2462c34716faca626d7a5897a6ba305ac6c5f1576a50e2633d642bc002a50f29. 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/NLT2H2100806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2510773e04bad6dabb9960750ceb6e55a950726966ba93e9bbdf025b550a32fd. 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/NLT2H2100805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03aaa04b6d02af0e8b2a386be73fc0c65eb01ed15c3a21df461d19c47b761d3c. 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/NLT2H2100803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefb2ffe8746b2ae22189aef508a177edf1e606eca32ec3d770afe241dce9345. 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/NLT2H2200367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8336a848b91ae38885c44ea61c83cccb59988722576d0e82a306705f4872d288. 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/NLT2H2200038.