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 0xd8cd0cab4bcb33a7cc5eea1e161f4d46fe2ee1d27f2bcae12d7f33b8fd450280. 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/2d399983-61ee-4c6a-8052-d6af60afad7e.json and https://artists.proofprofile.net/proofs/artist/2d399983-61ee-4c6a-8052-d6af60afad7e.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 0xfa081bb88d9fdc6edb3f73134bab0ed669d6b8c76b5f0992bf73d7ecd9be1845. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/US83Z2211547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664b70aa595116d2f198e567f41cf7b3697efae7e5a62bfe454d29907537fa5b. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/US83Z2482594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad1acff345bd96e6636866e16ead5474b6f35098a840d089f719d98ec506af2. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/US83Z2482595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8515243c66a642fa73cd508e70e09c5c361e877db8fa4502fa5aa11979514374. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2482596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9e40992c907d29035cfd0311e9849af5d2be1ebcf4c791c0e2c6d49ab8b3df. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/US83Z2482598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0759dba6943d3b99c2c6c31e56c9e5accf9a4f86f4097f6f46fc88a05f9a56ea. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US83Z2482599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2f68f61cf82629b8ebdc95d97de1015045a94ba6dff7066562fb7ee3534e41. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/US83Z2300509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd67a725ebe4d4d3a77ba20fa063043f9182f9e44cb226d43002e463a146c52. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2300510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371240a089eb39e8cb21b32c44fc4bc2c197825f788f3dd6fcf607b2fa270f62. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/US83Z2300511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9830d8c186fe9bdf5924b24d90eb3d3e94cf2d4055994d91c705caa2e2a7d3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US83Z2300513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3635d0d97c1fb27c29299f604bf57118e83b99d0f134b54ec1085a44c0e7ca. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US83Z2300514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72570b57abfa29138f7d4556f783824dbab621f9dcdd01f6214fd0e218d1d31. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/US83Z2477024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c976455e2e17a4f42155bcdcd475e559fdcfa448c8f090d9b26cfd032ead98. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GBLV62318250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ed67626348a599e91eede3eeeef40e2523d6f771f5dd71439c897008076925. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAHY2486462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756c42f864bc926dfa58eb38d15919cfa8c9e537c09f0ddd22e797ea0175410c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKQU2406981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064cd6baada175780ecd0addd046cec852a1ac9d36ca317c8e4874c8ea04f740. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2406983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3b71c6779e1341d8cd0cce2804bb85e5b911336b31f1428782cff4d15017a6. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBKQU2406985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71b974255a71f222d9238435dce63748430dd93a695e8a3dc4b2b4149f4f7c0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBMA22317938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa654de3faf7e2c714a5101ae63dde697e304606d54f70876638a8bafafcff272. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBMA22316732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecc06953aedcfa11f899fb88c6883755e9c1bd990302c5abfe23feec0a37b6a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBMA22316733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cdb336ed149c6f87d2d41903d6b1081610a4f6e326e0bd7ae817f4b1bc92a7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2345013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369880180d669d5d931636c5ce237ff61819216766a0ab678a0313eff1d2d608. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/US83Z2345006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefa1561a4d5794b909c201bb7411ef0000325e40d06eadd49c542c1d43111a9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US83Z2339581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cda9513cb072787e99e06427deeb4a357ecf80a2d8039451159c06e37f4df4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBKQU2288147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f60085dfe19afd2083fc8155588f3c504c61b7f26654ad1ddd6d21f45cae51. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/US83Z2311170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355288ad23a40b967442f396e8b31408e5c059c907501faf49057aa0c8792917. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US83Z2311171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575bad8d5bd3fa2a1428226c18cfdace947caf1aa84f17728188c92175d17a19. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/US83Z2241455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca33881b886303e6f12353a7e5eb79b95a160d634d56a8fb37e63ad215b2756. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2241456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3943590517e5ffacade07772fe5efdfc61ac4ccd51b49f6ebc34b5fdb48f96e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US83Z2033773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8212386da79151a5e1278612952569aee03bfe3f894c9b40114dc58c2b9f09b7. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US83Z2033772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c10c29ea5b81e959f42bfd40ecfbb0d5f5ab2f6087692387d07c4356737803. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKQU2052598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb39cfc0f92a40d14d3bab6e4473bd7b1eb14587aa3dc7d872288bea488e9d65. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2052599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefda83c40e1609814e48401027bed1ee77626526291ab5d4021ee73477f7a740. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2052600.
[URB001] Unknown Civilian - A1 (Snippet)