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 0x7cd3b60d233726522300f32afe7fd0148bb27b15a3090ae797dc640bbe3a4371. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3b1a1e9-c5cd-4e2c-a497-053bf2ed4293.json and https://artists.proofprofile.net/proofs/artist/d3b1a1e9-c5cd-4e2c-a497-053bf2ed4293.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 0x779352d395b172ecd10d4843a46f57ce799762b8dd0fee00f4d00f45f4715410. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTLA2216881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb046e3dfc5e8856a04f2e0cedb720813bb3dafbe028819d8450da7855c6a86. 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/QMGR32066954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb046e3dfc5e8856a04f2e0cedb720813bb3dafbe028819d8450da7855c6a86. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMGR32066954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec6e01cbc2e211b2b31ae0fc92f33386736676cb145472ba188c3facb46680e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN52100795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7cd8ccf3071f402bfce7369e260f316514baa461a3c41836a615e015d4a4fa. 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/QZNWV2575152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3bf437c0e87bf8aaac16cd19a9ad5988da27ef31075bfffca0a91f6cc8d3b4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZQAY2150620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942ca02b209c389a84ed08e120a21a3ba4c1f70cdec91060de866cb92c785fda. 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/QZQAY2137491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e758349bedb71a834d27cd8cc00dfeeada82fa4357b0351f245a33a7f23d88c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZQAY2199645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef749bbad3a496a9d223fef7a5121e8d6aaca99ae75b3c1b17f9e9192c688114. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZQAY2149518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecdc1d65c47d02b2baed07322272d264a60f9e98f4276be5474879028dd66e0. 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/QZQAY2153983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf263ad84463e32bb7e763ac3781747c45c20b82dac111a2b670a7a89efc2e7ad. 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/QZQAY2173380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68b9aca133284adab0093a8ff6f6ae38ad27ac8b8f54b551d4e58624acd7240. 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/QZQAY2180627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54820e35dcc38e0182cf900815c9a99877b27594455e8c2a52596c5ad2c1d4a7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS7J2285765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa50a220d456b48e31a1cd3a2d293a0189a4407862a2f4ea8e3a2312a77ff0f2. 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/QZS7J2215680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b993784051a10891b839cf86684fdb9f526ef480a042cfb752166a53ddc84be. 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/QZS7J2219370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0ca85d680879c75a3e33d9f546daaed46f38e858e502eaa029907f5eb6e789. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZS7J2252920.