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 0x0155c588be90fb86bc6eff43877f19a6a3766c6191f63b83b4dac0ffefe1669d. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fb045fb-2471-4062-bb6b-6d571f7652b7.json and https://artists.proofprofile.net/proofs/artist/7fb045fb-2471-4062-bb6b-6d571f7652b7.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 0x5eb10dd48ea8a7a0adfade232192cd2898b35bf8207f6a1dd6b690818c5923bf. 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/QZFZ22375752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644c1c13f7bc302cacd7b9cbdee863e8f2284caff8bf803ab88b844d8bd6d08f. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/DEZC62379233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb142c97b2bcf5eb0f30aa40cc3b5a897e8c005cd1d6c2d7cbb5cef1b14107480. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEZC62379235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2350ea3f96050a0c091fef85a34393c27adb6597aa65ea0b4b3b72cd91407be2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEZC62416031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9dad4c96d076179b26e7d88f7247d75620b808eb5d865a43bf3f71ada290ac. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GXD7G2272169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613e2b90ae6e5dfcaf680b25010702f87c9989b0424a358af0a1ee186bf657c9. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/AEA3A2233458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdee3c14012721d6650d658dfd22985a3dc6534027ab7e99c859cc52cc1c993. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SGW502223656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2350ea3f96050a0c091fef85a34393c27adb6597aa65ea0b4b3b72cd91407be2. 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/DEZC62416031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265d7137f65c2b6ef5f4a610d0d79fd6379dd0289260d2da4c842de93367881f. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/SGW502221432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b4d92c530fc64a413911934440b6691dcbada6c1a0bcc17aece5d289997875. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEZC62508104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c97b0cbd3755c0aebb893142cec0525461075d62740fbb4c08f7b842d8caa9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZRP42421006.