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 0xac7685b438b66fbe6a4bb56297f08673bdb25f2aece842f91efb0c471ca5fe4c. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52db0985-0f83-461d-a54b-0001051f528e.json and https://artists.proofprofile.net/proofs/artist/52db0985-0f83-461d-a54b-0001051f528e.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 0xe26da97a7720ffecbf9eb0e72b62189fcc7ad9abe798722cc62e5c44226ca122. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFQ2312765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70771b361bb32cf44f6b95940d4e9871a3d73d3dd4e57884635f890247c43215. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/QZWFQ2312766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b0a036c251f4a461bd56741fd92f6f966a54e640a1e3f610b43e368c5eda99. 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/QZWFQ2312771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6beaa1a3a41b644ae1839c575d325275e42f2b73c3ac8fe5aec887bc55d237. 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/QZWFQ2312772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4abde17ec6f206f273b68bba66e7934b88caf2a495faa833e16858c41b38c9f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZWFQ2312767.
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 0xa3f77c11fe2cd86074f9a338d8e60e2a38e3ca24db5614486b449522fc473cb1. 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/QZWFQ2312768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52f4beea5f17dd4c50eddacac84770765ebd90dae212909d4779329487bef71. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZWFQ2312769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03888b8456809af05b6d052dc7b2bb68d1e53625ba48e5c5a76692384466f11b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZWFQ2312770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea9617913df707654621ec1ef31d6cf631e488ef678da32da1b491d43e84c37. 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/QZWFQ2312773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab6282d1889e4cd3d20573e9b16732c845285497ac553216fd7e545f0258d65. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZWFQ2312774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354afbcd8e77a3ec0e71a19c2667432b0f685a03a320af52f75b21f90bcc9e90. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZWFQ2310823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c4fbd508cf7d29b6eb909ab9809a6c158e896f7ba8bb506e7065728bd39017. 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/QZWFQ2310827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d44b368a901dbde412c888dc6229121ea6f3f6a4514601d752ec069d4fcade. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFQ2310828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4171419921b59035ecd25fbd216c7008206f3543266c7264d4f92856879e32b4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFQ2310830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c1826b29a4fee650e9cabd88e3b0aa6d9dcf3f958a6b93b9610f5a384704d2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZWFQ2310824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398efa31ae7d6ad7e88f304f2151b064694959fff91e4a0feb922d1062229070. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZWFQ2310825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb522525677e02d91fe2ee4e09aed08e53f4b9ee14ab4abe8245759fa1892992b. 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/QZWFQ2310826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507e61a2af6a6f5e0cb8d768f655168a71ef2ba3cba57d953dee8b1bf496a69c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZWFQ2310829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe766637d911036be9b98bbd517fcdce2a497e274c751c154d4768b13d922c42. 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/QZWFP2348028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80eb1e9ac6a6fe0bba39788480456119eaca70cf0cbba7f0e64d527ebba7a01. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWFP2348029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c7b8747d54edbb87ffa375bf72599b9d21062e5a13c6a9ba37eaed53a5b006. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFP2348030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc250572542ab352afdb3c72826d749bc936e5b3616ae18ea45c1b47fd565b5b. 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/QZWFP2348031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9beabb375a436619c8f491038c2b165a7cdd428e08de7f62b135c704c87fcf07. 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/QZWFP2348032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70452895ed82cfa5bc339ce374309a27e754976e991dc3095555dac21f4cf173. 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/QZWFQ2311678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8b26fe624ee5f815c7a18039e9c80906bb5e49bbe6420aa962fd66fd3a9cc5. 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/QZWFQ2311680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba8e957f02c76536a95db99b3dc180851dc130deea8c7ec7ac35e64e9beae56. 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/QZWFQ2311682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3587345a3cd49647200b19e60f7398867d34ad4386acc4ac383533144bfc3ee. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZWFQ2311679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90af2c1bb0c506106b12a3b7239eb011ecbcb2b2a063cec1b6e863a6d0daf8b8. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZWFQ2311681.