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 0x99a0c7660a424d0cb397fc5036412285531bbf4cbe05b7f166ee29dee4045944. 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/894e4115-67ef-42f7-9a30-bc85dc501892.json and https://artists.proofprofile.net/proofs/artist/894e4115-67ef-42f7-9a30-bc85dc501892.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 0xd8e42d262a9c4784672fbc9ccd8d1c75558754cadd73a67a854dc899d3132512. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFY2119588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabc418a073ad7d3bb866ae5d4d9832e1b1e161a6bc3e7e49b9f0ebeff02fc69. 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/TCAFY2119599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a4568db887d7e36246f7b9bef172d81f375ca4359edad237c9b6876765786d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAFY2119610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6350e233c77591517b1a2ab5c43a792239520421dd70f2bfbade70f893b53418. 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/TCAFY2119614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e7e99117f9e3d18d39f91ede260bc8f9061881c4ba3210b5de79f7deaa3044. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:51:40Z), 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/TCAFY2119647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb033eec37273f6e9522d96a440e92ec9c1dca9ce7247ca1442e3125f61968a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAFY2119693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008e5e38efcf5159adb8f2c29c9694042ea90d4e5d6ef166b26566603908d068. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/TCAFY2119704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ba54dc4a6ff952ef3a19293eca907a4f4a9b27c5af318bae98b5337790fa5c. 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/TCAFY2119721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd487678bfa619feb06ce7d4274e9c0537e6c1720d4fd78d62d68d354b8b68677. 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/TCAGP2246090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd84605dc9bc6a9e15f3182490c5e09ec2dfd0f3593a949da24e7e16753b6488. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHS2329480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46dc5cfb422eb40000fb06907618a590e3f24d715d8f06287cfa09f3e924b2d. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/TCAHT2485822.