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 0xcd62a2fe718f866345e3a1820a3c146c1967b394357a0cc43e4e6547f8a29bdf. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b58dc9f2-e884-40c4-b680-3dedaa8455bf.json and https://artists.proofprofile.net/proofs/artist/b58dc9f2-e884-40c4-b680-3dedaa8455bf.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 0x1470ca909e4bcff5d85e864ad8939eba525b0a5b0e6c6e7a604237153bb63ce2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US7VG1631838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a2c232fae618a609b1a7e741afaefde6a51bc3e110a56074504dff768a227c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:01:27Z), 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/US7VG1844116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a5d4bc86283ef2ac24c027f019f460c583f5da5c5e5ef78894e16b2f7730ea. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:46:46Z), 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/US7VG1844118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7404d5eeee0516d66a0c7b0f592ee02e10225309ff6bda88f1d2b5e96858547b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US7VG1844119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb205eb2ac85d21c8d312d75f3a20687525b73e301702eded04d2ad79d8970bf5. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/US7VG1844122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b663cbc1ebb57159a13f4d950e60ed003b271c49adb2ccaa55dff7e404a5d5. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US7VG1844123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1a0c2308618c430da624e974529ec8b4de7eb6a84d5ac0c0e424b6a862e241. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:28Z), 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/BCUAL2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17da9cb65d791f194d8e28a5ba9a0844a0b6471b664fb772bb49515ad3974073. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BCUAL2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981be089de1799e3c7563a72597bce9a7bf2f561481de42a36ce05d3ea7cc263. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:01:37Z), 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/BCUAL2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677f34b372503e7b77fa5f2ba86e1157917d8bd24674b7c96f3adb10bd84a5f8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:02:00Z), 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/BCUAL2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb452c8ded9eedab1d54c3464df04d4d34e5c21892c1d4da6c2922ac0321372c4. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/BCUAL2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d9fc29ab18b8862b9909675964520c424e13968257bbc92e37f21dd6b0c6d2. 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/BCUAL2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1e608d47a50be54cf7f3477303d41242652994a0239044db894b3fbfb984c1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/BCUAL2500005.