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 0xfc48beb0bec3fe631586cfc42b4c327fd7b4174823afc8cc56537a05bcfd3fab. 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/b94eac30-36a4-420c-a5cc-e8798c947128.json and https://artists.proofprofile.net/proofs/artist/b94eac30-36a4-420c-a5cc-e8798c947128.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 0x637a015a789fde5f8a662dd9a20582433f9cba60d14d8b90acadf0cad2af8a56. 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/TCAGC2266998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2d6cd619204dcc68525db46a4f3e6a537ea0a3ce77e8a2c10d834b023585a9. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCAGC2267170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2981215ca259642499d6302924929e6113d06e9bad6dffbd0f99ae962a8f47d1. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:51:06Z), 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/TCAGC2267184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedf53017503924bd736638501b721dbc56c263c01a56965b33a925d9cda11a0. 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/TCAGC2267461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbadf0b8ff3de08518e500191126432599c87e060a5f09e32ba82fcfbdc5159b. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/TCAGC2267253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f6e0b24b760f6cf2aec26686b165f131369e1811eaa20a7dbf65b21ff584f1. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/TCAFS2163933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509af7d87286f5abbde86d48ebc724894a10f50ac5d763a835c1ae3cbcb363f2. 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/TCAFS2164024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb777561911a33fcf196c09c305a63ccbe43b981141fbb8f3a4550136d0958453. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAFS2164045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81c40b40a526fd0b32ab6c7e8349cbf8fe9d0e223209610baa120105df8cd4d. 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/TCAFS2164134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244a716ab04de205db77a9a755e91d477115249418849778e4ecae87880dd21c. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCAFS2164159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2fc79d908731a8c737cd6e0cbd52238bb5db8ac3e794dfa57b20aa09c6ec45. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/TCAFS2164212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7919e61ec1d125596ddce35dc6e5420475932ba8f28ea0a826c320819dd0fac5. 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/TCAFS2168056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fbc794da340faba8429cca9d9a2c9b383135209be2c3a9a193d904981ffc18. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCAEZ2052522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cad9d5aa5d8369682ec0273c0f12249aa65f379929af3e4e5a456af03646e6. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:37:31Z), 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/TCAEZ2052456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe239500ff8652c9aa8fba74710536b891a61785dda2813c98e69256d09e20ca3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAEZ2052476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f2b8331cfa049684ae2457a75e6263fa5c0f421ce4642d446e698fe978280f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:10:05Z), 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/TCAEZ2052503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db4d460ee05283a70351c3484f11d7a4d3ae6788fd3bd9c2fd75d356ea940e6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:27:40Z), 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/TCAEZ2052536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce211ffb719eb3e186e5de2de00df83e0bb212e4b20740beecd4732775eeae5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAEZ2052540.