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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fd54efbfbe047d3f0ea95582dc3e27b02bf95c8a97aa843de3243b5c868051. 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/fb3933d1-d1f5-439c-b682-7f2e5608a27e.json and https://artists.proofprofile.net/proofs/artist/fb3933d1-d1f5-439c-b682-7f2e5608a27e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f94025794fedb60e948b73a89b5ecab67bd6cf56065fb51ad1a6883abdcbd0d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4TW1605321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab62b66180bde83d7114e5df2f4b4adc908d69432e7d24c5c85a197085cd38b. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QM4TW1605495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524b0a559643eef448db0266e88e25a3f14de76b575fa7063bee1a88081d9ae9. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/US6R21504496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3a23139ec6b74af8c0d34004042e14823931a3f6e4c3d3506063f17c4f2a3e. 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/QM4TW1603937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cc792d89c095c0c6e1a73c1d737e876454e375decea435ba9974702a2d165d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QM6N21790466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4d544592edb32fb984e76b08f8213a1eef07146f2ae4a2d08f71ae73bdd952. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QM6N21790467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa206027b37c438e2b280dc4005575ac0fc4cc47149ccc33cb0a212873f34df. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QM6N21790468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3f529bf7b3b9c4729d3aa98d00350ce9c89f2cdb379cb151879bc08a4f9fe2. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QM6N21790469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934aa2cf6ba0013e0326db924f0312855d0f16445debb9d19bb2341d194e3bc2. 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/QM6N21790470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794dd46732605800fea35453e68ae45b2cea604af95ef59a55b3065186258314. 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/QM6N21790471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186060015e12a1cef6642139421583bb96019100bad054c08d9252dd4a29f2ae. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/AEA140702210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d89c30ca3afde5a7381ff5f386ac43d8b22e109de82a7a5bb2f53988f775db1. 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/IQA001000604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd39e1144d0e8e359cd9e994c5a793a435bc39672f181b2e760e9d725537e91. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/IQA001000606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7dd876fc209f90ecea2856833398007b164b2003b376b5e59322e526442437. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IQA001000608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a038747d4f4301c6b4151958a7acaf0e713669d0945a5136e400d644a54c169. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/IQA001000609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42095e25164cfc3c2a353f50a65a2972a578a228440d202fbbe2b1f5a150f02. 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/IQA001000612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517db56d901d5f699722e8f250d37ed7e9b63e3ab9a51362bd1acee46ccccf8c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/IQA001000614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb971b0d84f5d34efd8889e1125802ca7443fa470d415ee5afee4731daa57ee. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/IQA001000615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4c41eb661140fbd17769e8b2692de1aefd5eb4b6e3e97e64c3274c813f0c2a. 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/IQA001000616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ebdc14d0f3a145bbfec4ff3b5ca1d6fa346a6f1bbc2d302c05481961b022ce. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/IQA001000619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13d01754dd7349e412c8bc1c0af6a9fed886346b0b95ca6c2e8946fc9cacfea. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/LBA131903933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c371ccdc786983d971dfd77768e12894bf02b5424591313a9f825e95a544f0. 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/LBA131903934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665bc53777cf9ba2abe0c9672b64961e830905561d03c1e1927c0722ad28a86d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/LBA131903936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9619d975079386ad03266c4fb0df4511c3f2b76a5cc1315c0dffb3dbf39cb08. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/LBA131903940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa326fc20a82d1a31f5c65307bc69f8dc6534854025a2428471cbe1cb00bfd8b9. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/LBA131903941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7df1b8267422fb36fa29bbf541542e0a0eab26e6e76e843cd579d301876b8a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/LBA131903947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54870036235c9bc416facc2142f08d6ea9d4b1a84c7653f19922971d826dfd07. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/LBA131903948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f1fa4f89c41e1b43693ae38023c6cc663566fa44a30fb960bc518833305ad7. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/LBA131903949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9554654572da867bd51b94232ebfcc49f30ef00e21029671bfb3b99166cfc4. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/EGA251721714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d83a29f78be0fcb92a0c0ca7c7e1b91b6c867fc9a25e8ceff0b13673939adb1. 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/EGA251904601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5161c0ab02a1fbe21ba7795c10ccb430478dbcbd7c67e2a253a11782ef3304. 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/EGA251904604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b35d3a62e723cae66dd531342a27219364475039c66bde2989eaf37be5dc62. 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/AEA141703452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d6ce790059cacb4f5f0de0373e492e88d80afb5e25147144685beeac8f5998. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX201764612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d1575e88ff74270d5987f360f88fdc80411a9d602e0ad210b47f6d9eb46439. 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/EGA251721728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66769ebbb5826d16a2d41fc4577795fa1f650830c4275e4cfde4eef324be8a24. 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/EGA251721724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d15f317a93a61c34070b2444cc13f49f2be453a09bd00dad4c9dacf87998351. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/EGA251721702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a863d8a4e69570f19f8b3bb03bf24aa23f8e2410c9e4f2a9a8f11e2de5908c. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR10S1927407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456366bace5e2bccb35b6a5f1222a5f8b2406128818d9098f9b76f72af463664. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/LBA132301578.