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 0x45ab3ab1e29e83fc53177e40f675662f2e7feeb07772faaf7a84a8a02e9572b1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7798ed04-852c-4aa0-83be-157430f248d6.json and https://artists.proofprofile.net/proofs/artist/7798ed04-852c-4aa0-83be-157430f248d6.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 0xed0c8548e79a6a8d806945c22669b762b8a1ec34aea21275479744929843c83f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFJ2344633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0c8548e79a6a8d806945c22669b762b8a1ec34aea21275479744929843c83f. 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/QZWFJ2344633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72401b9ebf0db8874bbd9a002a17f70502e22882324d5c96068c69bb3809131. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZWFN2324811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacc2266019eb0c980d21808b22832c35fe8f0c58b87787aed326195581ead74. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ22404972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126122bb395cb7c21730f65801f935cf625d1f27b542697b01c144924075cb6e. 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/QZHN52440204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6854043901eea7411cf1e154b275e0ca30318272d492240cb5bc18574f5aa28. 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/CACWV2456216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cc5f546bfd06e6590007cbbe5f518e5f075d2a3701af6da4e3f6f5b898db49. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:57Z), 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/CBF8B2412540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429f03d1704a7ec819ac60fe5b7f17e9a24446d8f78bc41d608d02a2d7d15df6. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/CAENV2533668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429f03d1704a7ec819ac60fe5b7f17e9a24446d8f78bc41d608d02a2d7d15df6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CAENV2533668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3934719153289763ace30ff080bf7387d9716be6cff0006ea435df8c8e72f5. 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/CAENV2586498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e831c44f75afcc9951630c5a6bcee502ba6c117f00032709e95be42035b227. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:53:42Z), 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/CAGOO2565695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e831c44f75afcc9951630c5a6bcee502ba6c117f00032709e95be42035b227. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAGOO2565695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9fa9429da1f331fa363c5ee96c6cce10c211402df905f521f949fea54dc048. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAGOO2598170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc8e2b7e2b691784197705ffa7fe8aa32b713322740d7ae3c73932fdc859675. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/CALVP2570242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf61e34a1432ce1a399b90864720248214f3609d78bada0d10d002d71e9c740. 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/QZZ7N2545985.