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 0x065adf1743035d068edf8ab8132d117beb81a345698243c8c855f942b6cf72db. 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/159f8a6a-85cd-4437-93af-76682cd34ed6.json and https://artists.proofprofile.net/proofs/artist/159f8a6a-85cd-4437-93af-76682cd34ed6.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 0x2ba8fef75e04fa215ba8e5d3573957d20dbc655b493a6c54c76b16e4e6dabad2. 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/QZK6M2116168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f1ae61c190d9010ab315d808192f63b4d916336195c2d550561ae6f44dc321. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6M2116169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af34ab4c45afb261c33e939c42796cc2c0d3ddccd11fbcdb4c259c84036d904. 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/QZK6M2116171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7be2bd0fe6edf066d2e6bc340c686f33641cbf8bff27463bc42e87b36e474af. 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/QZHNB2181547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1207bbef9bc11da1a611e5d7aea458d9be9bbe948334fd535ae871bcfabe1ff. 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/QZMEM2058089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0210f081ab256cd8e6e2db0444a6e20af22c7be0f9e17ee456bbd031b1eb9ae. 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/QZK6M2116173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05770a92e5a70bef7dc4aa3db720ba0e349714bed06c3445f4ca5ceaebfb90f2. 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/QZNWZ2012558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc833d136081a17ad2ba7cbdb768668f1cffff90f426ef6a29415a5ff65cbca6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZK6M2116170.
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 0xc693af6a5c60d02f5310588dbfc58222e4919e2649ebad56b91ef66329a58b91. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZFZ72112704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cf930125360cd3052534b9627b841d716c0a0407a3bd3e344fc0a491b86250. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZNWQ2074658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b441cd4d0a74a30f447912940ce325d3cdd009d3efc60ba0846f8d2b56c89f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZK6N2147741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0517fc41a51f22942f4c35036f6c7f73f42f759b8280dd1a755ad333246f9e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZFYZ2104513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb81b24928fcde68ea541f3c7b8fda22c62e4ba2bbe9eb02795f849b90554d8d. 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/QT3EX2444579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8572dc453e5e5ac11525ac6df1e019b2ac680b9f636ecea386fd29a7f92b81. 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/QZWFT2447540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9cc8b924d354be81a0e982cae7371fecb8f0f0d1fce38946662cb5d2ea2b06. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWS2422448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c946515444f53ffec9b68e7d927caf26bc4ba38a4071eb4abf1d0a03042895a. 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/QZMEP2492041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453c0d64ec57760b02f55229ef3b0b004332fd50c2146f180fb1c2fb2abb78ad. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZK6L2436324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40fc71f5c85d7379eb7e11ad8c63b8e4c873023de39fb07ed459028473523b1. 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/QZK6Q2419628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefe54f06c650fce293e33325744cb7bc8037ee3e6fc7919f4be8a2f21b039f8. 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/QZTAZ2360789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e670b21e39f01115d96bcf59edf966ada1e19043da9e364770e3e56ee7deb54. 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/QZRP42381908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb7bed44cf0c911862d41353cdf8a9d2da74c8d348ea9aa2999176af299a71d. 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/QZK6J2310098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36272ca575a308b4c34c72859a8b8713343abd4601f8417efca6655ebcf1aa18. 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/QZHNB2334686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa46783b7cb2f42dc2820cc220060f8e24f2b7cbcc2cf0e6914a9ffed79072a5. 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/QZFZ62347953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3323ad693aae81534b07df8edfa536d8aeed96d661ade0b4dc1b2a242a6eebb. 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/QZFZ32388867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cad296d11a2ab8bb3b7974f349c960cac2e09a51a212a6646dd0c54d6733b66. 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/QZTB22212420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ee4d3ef9fa9c0d1a09f72b578cc71a0e17ba185195990c38f105b4f46e55ef. 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/QZTAY2256845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52927cd2cf1290477b956d2c995e5de80969c4bf19f0b0f2e6df31084071f3e7. 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/QZMEM2235775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8c6c50a18502e5f8bcca5babe712fa8dd28b1a45b67f72dfe568c2e24f5193. 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/QZMEP2255496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5936bdfc2edd547210a0ec65f54b186e3271f7e4d552c3e4903c19a37d763b2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN52207065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76493d5a659baaad4321390568442ac074984d785665c3ddd9e6fffbbb1b0294. 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/QZTAS2127357.