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 0x4e0218b48af9e527e2920219fb8bb496b4f0c9de92a30eb0e4f57213db6ace9a. 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/c5524283-2c8a-4d4c-9f95-2a47df501aa5.json and https://artists.proofprofile.net/proofs/artist/c5524283-2c8a-4d4c-9f95-2a47df501aa5.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 0x751901e378301d6043db42663a5f42aa5713c54e4e274c6a894ac7022af8fc4f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZWFR2399521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226fd0e665b2c6a810ab0f7818e74abe3d4a7d26c0383576347b0302a2a2fca5. 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/QZFYZ2401974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a89ce47261a02f850f2448e188a10df0302d78e00cff411b55566e3389ef50. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ32412905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f6b794cd3007399f241fba8deb04f82f3862b378e069a561f3fca6027eae50. 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/QZFZ32413595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6656c16e8f4b14855d01aa554a7bf19b41a984f69d475f57154d23fe46446f2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ42541980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3d71f0bd6d3e65f8d00dd50a73c73860b2371a5ca1f5a0ab295785ae067889. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:26:42Z), 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/QZDA72523714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1966ef051846f00b7f03b1fd5fa376999d39c43b2f85dfaf620e1aef69329e. 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/QZFYX2568786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76340c7c7fbc174f0e46855181a7f3d847ae8f14561d7847c02f3003170d7130. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:36:48Z), 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/QZFYX2568787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a45b9332e2320fe30654facc5ccaebd2e317ccdbb07f136d88c222b6772a46. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES52574003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbac10d20235bd051d609e50c181cd9b4a7e07454ab16927fd64cbf17d5d2567. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:48:13Z), 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/QZES52574004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe268ef11a7895380763c2bd880791f9eb03ee9fa1392b39acded7615b9858d8. 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/QZWFP2366639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a183b2fff06b78518fd9392255232aa1db55b68023aebf1274ea0b4e66585d7. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:04:20Z), 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/QZES52574005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0345fc659434a44dd2fc7a8c6df2ded55919f0b652ab7f078a677b7b408e445c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZES52574006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bdd6497192cae1b9a7e67520672ffcf1b545b9a374980ecead565eb6ebdcfa. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHN72415922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa478587d85a7312c00d46dbaa365bec47e83d429546dd3dbfdae840dd83ed0f3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTAS2585895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28be073ebf3ec300587c51f071079cc1ef94c3da38723547c5c973c19e89c3e2. 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/QZZ7M2552171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8563c1fe577e2f849775fbae7dbc98b059e70ac915af3b72e40fa2d52ad77fe. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZZ7M2552184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef2f1c09d1e001e48759dc260e48de3cd282dcd1563ff591eb2984db6030470. 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/QZZ7N2558030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fba93cf85c78db5b5bb6bad21b0fcbd4ec8299db669605d687880b7a2a5c57. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7P2550198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57a0e504974edc3fc1ee2b91196f2933947431535648598dba8be2a3ac83b4f. 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/QZZ7U2519532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcb73f7e2d1b41814b2d60c4051c229a8bbab009906c2fabb150ea35beefa24. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:55:16Z), 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/QZZ7U2515489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2366c7b553cd37a96f604c3fb6bfeb86e0e05e987c7260460e08a2d450d1e9. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:45:04Z), 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/QZZ7X2556053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc275f2b9d62e64280fdd4c89a0d2737714bb40e5a88e704eb8bab8dd92d53325. 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/QT3F42598441.