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 0xa705fb1462f5426673852698b28994f593fb85d081f6d73bf1c550f5a23788ec. 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/f0f6cb80-3142-4997-954b-f206179c5997.json and https://artists.proofprofile.net/proofs/artist/f0f6cb80-3142-4997-954b-f206179c5997.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 0xe96ccf276c47a478fb2eddbb40d5da35a4e136ad247ca06739d38688be848960. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GXBAV2504442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f5df9bdffe152681ba78de5cfef8c27c0128012a5da2b15eb49bfba3dafd03. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GXBAV2502448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3036ee2a835faa5339a09bcb4512cf2ee719a49c4ab4393e06dea6ce6a724b. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:34:23Z), 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/GXBAV2520129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a82e7c0c06c5715aef7913811c77552160cd0b3e6f3d4b37ae954f82db52192. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GXBAV2564428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4d5a7ed485a64c507c2e217537152926bf888cc65369f4c21102da8c8482cd. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:36:35Z), 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/GXBAV2558399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4d6b9d52ade39560af05cef460eec971fdb5b8dc9f4526db57f92e64b527aa. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GXBAV2512228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf292471104eb53ea42b9dfab3744b2740a625104d6e01397c724ec05f6065f60. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GXBAV2512371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d9404a542e70a195b45e950beb7e71d469e28f18553bcea5320f7801f306a3. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GXBAV2551861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeca40d1cf7ba95f9084c313037ab427b13eb62d3e56d278c78e074d6b65174a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GXBAV2501740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166e385cc8725fba41f9b1d33b766d9f6c928e4494dff8dd5023b4b8faa55311. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GXBAV2515581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532b0890a088671a44f67e33c14c17948112acade271f2e650b2758fd31193fb. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GXBAV2583151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff46c2f4e3b0f111486540af592bed03893a0baa802a5f0cb99547626bd71ab6. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GXBAV2542448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59895280cad48e55c113e01f295ab84072949d9f04570153cb90846d87507b2b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GXBAV2587232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e15aa6971651201e2fb738765d1465b0232e4fb5b2c58b19a6cf2e4d2c1f562. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GXBAV2501126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e964c20e9c005a73f44cea12592321fbebc8a8895449aa1b8085d96e9acfc2. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GXBAV2536016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0631a7bf7d60018e880600d88f66bbf22149b62193d5d3fd2fd3955ad0408c7. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GXBAV2512553.