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 0x2be45b0a941fc757da93b64c753884f9d77fe7ffa3f0100913cf250c607a3cd9. 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/bf2b891d-bbbc-4330-a871-e2605d039991.json and https://artists.proofprofile.net/proofs/artist/bf2b891d-bbbc-4330-a871-e2605d039991.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 0x91550e38b95fe4cec18d8c05033d493468f63c0a38f6fa64cd8b9198dc7401f9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/US79W0701401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e282f940066691282f4919b8ffc00e4578cf061df1e09fc3dd06ba342f87d6. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/US79W0701404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96bc8c1de60a8823d853fb2cba21ca3c306ec51961b7d942551565697f7de90. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/USZ541200721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c4a67e7e6af241fad747c72466022a453f1d966df3ef8145ed6a551fb4c8de. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USZ541200836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a62582039afd7b69b82d4ad7cbc8011d7851b52efceeb6c7b3cc84c492285a2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:59Z), 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/QZFYZ1978012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e69683b8ab03951202d94072a0fa0ea329ab2bce8c287fef1c7af69c73db98. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFYX1917555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92c948da073f99e93983a9048d071b439d4babd340e5b78a10cfa94841f6837. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:03:53Z), 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/QZFYZ1978014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406eeed35aef5b13b410d1073c3a801c681da5cb90f8e392dd128855ce3e4c92. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZFYZ1978015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3236eb949cc2d3a049dcbf5bef7436d2c60d9128d9da2810c4dda749b9b2a73. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMEN2245184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2946f547e67fd84be71b1b18be009819bc9532d9e95df4ce889d9c101fe583. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:03:26Z), 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/QZK6J2502235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6befe4ae6c57fc2cadfb38a380d6611045e59dbe0ed4234a7328cbae491f56c4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWV32568216.