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 0xcb325ef5f8fc054f59eb41200219afeb832994c836a21e6f891de74ad79530be. 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/e8688335-a4b2-4d47-ad3d-24186f16288f.json and https://artists.proofprofile.net/proofs/artist/e8688335-a4b2-4d47-ad3d-24186f16288f.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 0x0ef3d00c6059d90e79ecb5588779a41c30f9c7be9b024db1c1ecf845f364dd02. 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/CA5KR2007898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07252831ebb405725e1886626fdc8e6a1a7664d7ca01c81e8bf54ffdb28a9a4. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/GB5KW2102368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99064c4073fc5086cbefe9d1c7f397d62bd0f301a7aebd85b14c731bad88580a. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/GBK6Y2251111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9ecf7b02300457e9372c95ecb325b222e40905a3309b1ca802462027ae7e65. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:33:40Z), 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/GBK6Y2251113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04a88ad90d4140ba18e97d782594ada6e4bb1fb880288e82a77f8d77dbab330. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/GBLV62306101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d407d89c019b696e232d530769e9f81f5f10c7f8c0f6005cf29ce5194af11e. 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/GBLV62306102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d94c54849181662068c05e4518a7f744e92c7d972bd5d12d6942a65ed51cd8. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBLV62306103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7777f07d3adf551433cf4ea6f159829649ec8fecd39e0cbf7216a4594307bda2. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:45:27Z), 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/GBLV62306105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4200a2af3dd81f62a33b47e3e56a277b126ff68659ef41fd2d792949dcd5ef. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:42:57Z), 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/GX3Q92402473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b6f83fba336be65251f45aced2de57bef7524407ed8b83f7b79f69f5dd82a5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:03:03Z), 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/QM6N22467543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c94da1f029e3639a8ac75b97d34d4a2971d55fde500413e7f059b84c7ada503. 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/CA5KR2493872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51509dc9aa122edd8d7fb5798e604ba7ae70c4d2a4067737701cbe23b9aa04e9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CA5KR2493873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62171da8454edafbf6e119781e912700b9b61a193739620661febf4d8bc3eb1e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GXF9Q2582913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae1e0253576cc4c737ffd1a01a282df95477f242b9716d42daba1486fad179d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GXF9Q2582912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00a3e735f543709a7969d28acefde04c205cc2f8ae92d85cbf51a499d1895e7. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GXF9Q2582910.