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 0xecc98ad56b5ae66f2ad6e1ab3ed14e556c2da6e7016cab6a66bc8eb582a15a4e. 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/f5e7bf93-0ea4-479c-a4eb-ee5899634a5f.json and https://artists.proofprofile.net/proofs/artist/f5e7bf93-0ea4-479c-a4eb-ee5899634a5f.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 0x1606e2d32aad5dfa71440a7c8df2b3b691555b6c9ad825d795573b711110a422. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GXD7V2512362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e81d4af8e717fcacfcec7dac908616d94954821bc3df9207a0d3d6b0ec8f351. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:35:47Z), 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/GXD7V2588488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03ecbf99644fa5e6fe75961f34747a5c5d4809e653894d7b6dec7bada2c1863. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GXD7V2553197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ae03f5c1091faf6f3dde102b7bd18e9b8c7244dfc38942f34b64716f54e18d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GXD7V2590334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dcf631910bdc0e9d279666ec22da866e83af1f4019575a29bdd972e4453bb5. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/GXD7V2512806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb87e1eb5b9f25e422fdcd86ab0b42b0bf1c2022e542216a412ab7166640133. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/GXD7V2520578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751bf25bc4a3f46a4689181289857f9231c2cb6ada59058eadc2681ecf270e3e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXD7V2503985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b46d80b9d5ae739e28febe65405b29ff99be7a101b83a47a5134607074c30ee. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GXD7V2567916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48803250ff3ae9e82e2b0b2057d209022946aded492022d5506339ffd9c22e22. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:08:31Z), 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/GXD7V2543814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0983126390b007832c1945249036ba915fa0294c1bbdde7be7abae8259344517. 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/GXD7V2574844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8b0e79c16d1e2eb94471d9d47704667f6008256e433979268154a9e7402c95. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GXD7V2538415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17835a054872d65ac22693e092ffa2d6fa28a4e4490c7823588798978f1c396f. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/GXD7V2543555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3650d1b82612e07822efabf98aefb74ad3dd65c4a48c5bf7d3add4db672a566. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/GXD7V2537770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2247e4752c28754086c399871c50257c3ce7169f9ac6c328b36c892a40fc5004. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GXD7V2531273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb829b0fc2df29f7a84ac7a5fd9cd6a8a6e9d3cfcf4dc0307ef1bdede60f7b16. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GXD7V2513265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8d9d6e8eac36717de4c582b6d525ba53654fab558abc695ed08fc1d81ffcbc. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/GXD7V2530262.