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 0x3da702f3c427625adf9fb882297e1da438bd1beef2f6d78c9110ad4aaaf1ca09. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac750f71-216a-4ce7-9088-3fed320b27e1.json and https://artists.proofprofile.net/proofs/artist/ac750f71-216a-4ce7-9088-3fed320b27e1.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 0x61783bcf51492372a0a481296c093b0142d46f6acd3305c07f153998fe177fc1. 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/FR0Z42101060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ccfdc7c4f9f153d0365246f054d73b60da065530dd7978a4ef72a154f20e98. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR0Z42100500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d44eda9900c9c0a21d6024df32a5aafb4a50414c1effe2c2a79475faaa050c9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR0Z42100510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61783bcf51492372a0a481296c093b0142d46f6acd3305c07f153998fe177fc1. 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/FR0Z42101060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495cd2a21134730539880f7f74d9da958732ae95b24f520b021edcedb75fce7c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:09:43Z), 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/FR0Z42100520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8c3f802d839365be14841afae3ae577baf098f3d27ec17f777cec216ab8f7a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:16:18Z), 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/FR0Z42400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b48b9fc38db4378deee06e8f52ea6a57facc7867686a2b950cf0a3d2ae4cfe. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/FR0Z42400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584475e8371a15394479ec510412eefbd1e380784c881fe921dfe9c133f2d116. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:15:37Z), 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/FR0Z42400180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1177bff36896624418d2d87a4f0aec1ecee5fe741fe2863b6c958703dea96966. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR0Z42400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3943b42e0f199552a02d095deab622e0abdfe9642827542d856b7d3347e6ddcb. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FR0Z42400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03883875a780f8dae91abc5b1829591d7768a8254bd6d316439a2e0075d1b835. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FR0Z42400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a8eb80ea6b45ccdb1a462e27b9230fd099910b6fcdd5925e037a71e59579f3. 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/FR0Z42400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1593199f24e02ba7909bdde966c84174e9c22f3b156fd92e4984f877a0cb7816. 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/FR0Z42400240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b81ed196ebcccc312a1cf2d873226ec1a8cf53f76b45ea81602e9761caa8cbf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR0Z42400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e97c8617e94821d670c1957bd26345ef34a7d58b5c82039a9e55da677b24ae4. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FR0Z42400193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100256cdc32bf2f78e8e71eb5d11840cb601ff3cb4914dc08bf5c3c8bb506a16. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FR0Z42000823.