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 0x84d18c40916b697d5c563ed8c491fd92671fbb0526103105e0fa74133c31bba4. 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/9c312c50-b9da-4e6f-b5f4-3a6c22c673cc.json and https://artists.proofprofile.net/proofs/artist/9c312c50-b9da-4e6f-b5f4-3a6c22c673cc.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 0xf3de477d7c58726a23a0d2ca6483ea3b49aa1656d32d202a64559803dc6e7c20. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:46:54Z), 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/JPTK09903730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbbad2471ec848f2506f5cb8e6b4f1fae5746b7f26d1a0a489e71e71297c7b0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPTK09906510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef0a8eb7c2d645e74f666d47464785b7de01174fbb8e06912eb5ba147094a78. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPTK09906520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb995bda87c2ca397e947cfba35a85db76b6d15852c38b1adf1fe3f917658ceea. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:54:45Z), 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/JPTK09906570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc485513fc26a3aaf572658e98c8681cc056efe7006d616519813031f08dde8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:55:07Z), 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/JPTK00002180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53e3708b8b771ab0a419b51b631bdca12b13da9a3020af72d73395d2fe3a021. 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/JPTK00003840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f7f379d30c6f92abf0044616d9896a7f4a29182687ca8985821c5e51f0f786. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/JPTK09903710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca042d19ff43c35a0b242a7ab5104905a76241d83becdc8cd2487a51d934e094. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:41:23Z), 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/JPX602300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbeabac57e578108920abbb0ca088e407579eca209515aea0a69175879164f4e. 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/JPU202400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb266ab09c04759012a40582e5035528037b08de52703301ac10efed02e879a18. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCJPK2525722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb266ab09c04759012a40582e5035528037b08de52703301ac10efed02e879a18. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCJPK2525722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b065a370275a9294b45705c80c0a23468f45772b0be6f8d7dc8c3394973964. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPX602100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80288b83d154145d4aeca6c9d674f8644a08bc7da6b81da9d1dd6166e4747e2. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/JPPO01147842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdf792b6702517c0bf3c56c3d264475680f19997537ec72d7699957d1e013a4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPWP02201035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdf792b6702517c0bf3c56c3d264475680f19997537ec72d7699957d1e013a4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPWP02201035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639e8b045677393c775cbb621131921aa345aa6421dffcc9608ee0d89526f3e9. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/JPX601800069.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch