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 0x7f2d207b127689162e7a9e00cea5005b8af390b5b0813a9e2b6003314f84f921. 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/0a4368f5-9fe8-4a1c-b3cf-34e0fc372908.json and https://artists.proofprofile.net/proofs/artist/0a4368f5-9fe8-4a1c-b3cf-34e0fc372908.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 0x9f0e456e9d98ed0074e3e150a07e4ddda7212365ee7e8022a322df09d52408b2. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/US83Z2209837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b76af5f18340a4e508ab13fdcab59ff567967c4bf1e085a29f1d9987a14d257. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:03:26Z), 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/US83Z2219280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf294bef9027c4a726b941f41d0af83a9c2c1ed04cb658a747b2116698dfcae44. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/US83Z2220992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a5b9d75410226caa81d248e4c74d84a0c2c8df2274a504188ee364b97faddb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US83Z2224988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af52555d7498941049f6714c2974ec4b96017f296143a4fece6a64e7238574e. 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/GB8KE2301569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa770e97fed92dd22b21658a383695d5cfebf4c97c5cf3442a73a090aeb50f5e3. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GB8KE2303701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7d1b53798c3eeaee09ec3e4f575d3ae05ed739280616e569d1708da868087e. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:33:25Z), 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/GB8KE2310095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282fa5a1656082b7debdcd2ab1bd2dc23d3efbdb11097955f3d4345aacf7da08. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/US83Z2325700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a99bf51b3c62468c1fd1395f275842e553fbd746816b1d22df274406986b69. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/US83Z2334958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417501b4df8f215526bc0c6272f758e3777e23b8b7f2ffbc90c1bafd0a7664a0. 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/GB8KE2428525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefde190fa07671fc978c01551cd81af54855ded86b4977aecd74aca6aa535662. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GB8KE2510174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93345e43df7408b0c1fd2c45a0ea990e17ba4a0f64f272dd8442c78ca3dbd296. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GB8KE2514597.