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 0x56e12139f026e77a090772cbe832b9579bb96fc4761202f3bb5ceb2e025de584. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b97e3ca-c624-42f9-a45c-0d0e5f377162.json and https://artists.proofprofile.net/proofs/artist/6b97e3ca-c624-42f9-a45c-0d0e5f377162.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 0x3506d9e6100cff2225353f74a30bc33e279c38b4179c4a14a4e12627c46d420e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:58:32Z), 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/NLX9G2000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e1ed3646f2fc37cc1a6901588bbc9efd3c9c46be7b8a7d3a6d909eff2fcaed. 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/BCD4N2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7145156d90c7f7c8740a7606176f2ff00cea380ef4d64adf578bc5c03ad360. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/NLX9G2100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf054b5355acd4c9bc87b4ee4bafa1e29850ab50ffbd3be7e8c2c79e01db97724. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/US3DF2257013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef69ca1cbadcd76349be4aaa354ea1a3ffb9673ef24702ecc2205d8088f6999. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:27:58Z), 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/US3DF2257014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca1f920fc24f2b239a9b1c36dd0a98be8031bc68fe531f5ed3e65c1616e01ac. 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/USANG2211763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca1f920fc24f2b239a9b1c36dd0a98be8031bc68fe531f5ed3e65c1616e01ac. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:36:37Z), 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/USANG2211763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040185567f480aac0aa89ec1282d2f6228d3e55944972428fd880d04359524b8. 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/UKZGC2411146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9171767233ebe1d94bde02889c7f6089391bb7bd2ae2fa83827f45c5fe7c10. 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/NL4YD2100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc902b7a12d907c1b053d47aca04fd16657642013f77922efc5069390f1a817. 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/UKZGC2300466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d775938974374d37aece3b0499198964e4ba2c0275a02d2e3ffc94940aa9f40. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USANG2170913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e30379c3fa2a304ef363878f1923a61f5a636319ae7f22b18f6e90067f07ac. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLV62127949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c3f63c724712de9f0e42fec97174583df9e61be7849576ccd9bf1434fdf316. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZN882394963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e1ed3646f2fc37cc1a6901588bbc9efd3c9c46be7b8a7d3a6d909eff2fcaed. 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/BCD4N2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba47117d926d849e9c1a67d78e6a292d2d997adbfdb8ba57fc7589720d94ccd3. 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/USANG2248417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ba59af289f61b30f7f7704da1f034f05c3a0f4055432f64656431874029225. 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/QZMHL2080364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa991839a525808f63a63fbaeed99424dcaa388da779441d44711a3228683c346. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXCMR2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040185567f480aac0aa89ec1282d2f6228d3e55944972428fd880d04359524b8. 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/UKZGC2411146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec6e7c58c7f0e1203e142b831f0777fa2e0c76c35a037ed2c32d56b47aa355b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/UKZGC2302587.
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 0xf843fee0e5ead468cc5ffcdba7f499076d6adccdc7f509028e9033293910dd01. 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/US3DF2064236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1fbf09eb9a298ba4806e23959e569254e2e342c175d602bb66ea8d713bdc92. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/US3DF2243225.