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 0x87db022372a1cd74823840e772b1811137d586a2ec2e5f71e974be6d8f3d50da. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb9bacba-b5d1-4332-a26d-21f3a4ed94fa.json and https://artists.proofprofile.net/proofs/artist/eb9bacba-b5d1-4332-a26d-21f3a4ed94fa.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 0x34cf16bd5e0c49f86b5f22b68fc7af1fea2d4317ce99cd2f258f77ce2320f11a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:32:34Z), 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/TCACX1701321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f70f70937cf792890bd386d264dd4a7b860161f029bf858d36ec01edd65435b. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/GBKPL1973455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec17cece4f164d125e4c13976626e0027fa6421e125de1260ab1022a259ce95. 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/GBKPL2008208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f901bd17a71bd047a809f3e464e86587cba3c3a3f41bbf0ddd045be7e69f28. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBKPL2019882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05421381164d40ce667341a518d40617c650ba7726c243ae91d82b796729e8d. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/ISV442304801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03feece4605b9afcda8cb3e29a1f2a395776a789917905a8c7b1e4c9cd7ea4d9. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/ISV982505801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abc004c70977178480245f6c7fbc4e07b9ccf3ef3f70b9838237fefc1f03299. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:10:28Z), 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/ISV982555201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1583ad31e509844630e8465cc1c19e241b68649ad54e30a4878b92cda7e424. 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/ISV982555301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028c7fb8f5eeabe587e1c60566d89040cf5c79a8b841e5be199e6fb6b92179a2. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/ISV982567901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028c7fb8f5eeabe587e1c60566d89040cf5c79a8b841e5be199e6fb6b92179a2. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/ISV982567901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03feece4605b9afcda8cb3e29a1f2a395776a789917905a8c7b1e4c9cd7ea4d9. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:22:36Z), 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/ISV982505801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93901586bd34c60217d0a9a2e09a8c8e828e2bbadca16233f24e448785b5ee4e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ISV982577401.