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 0xae77bb3f863931c3e16e638d27beb7279a57acc03f3a7779741e5c7e8c0cc90f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f3513ab-c568-4b1a-bb7d-8d2ea1d323bb.json and https://artists.proofprofile.net/proofs/artist/4f3513ab-c568-4b1a-bb7d-8d2ea1d323bb.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 0xac2ffe01be363538934555c642d71d74c62780ddc3b31351987c8b0875a8d434. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AUBM01100618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2ffe01be363538934555c642d71d74c62780ddc3b31351987c8b0875a8d434. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUBM01100618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe3d9372328bd98fffc725d2c8e7658e23f2e37df81287a37326c273b19573e. 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/AUBM01200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52c651934a2d2239ed25135280316b64dab5519541435d2c9be2615835e7729. 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/AUBM01200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d90ea952423c55adf9d82ad1f925868ad5ea03140e44f78708ed1eec9af6de. 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/AUBM01200193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e75744bb35cc44cc7446dfcc3cdddfc6a3f13665dd2b4d7f8d15f58a64bc977. 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/AUBM01200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccc088290e661ebedc56311f38496e30a1f8a2059582300563aba2beea883b7. 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/AUBM01200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6e0e3e21313360a7ee4e0cca1a97f2233017e0292205590c4416ff1a716e6d. 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/AUBM01200197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9ef310f05367da1e948e2ed4ca5d645d5de4542446792c5e8c5ac28a4819e9. 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/AUBM01200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ded8909171930a5fc7110cc7d467f5e73fbe4239a0ef038249852c8681331cc. 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/AUBM01300674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e4571e2ec886107825a63aa4ca2fedf77a2ad137174011e11d6003203fcb9f. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/AUMGB1700207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf726363072bec915d8ca4ba61558d37c13cbbc27ac8b29cbdefdee575b714870. 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/AUMGB1700304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4298096dfd57186764b2e698ed9fa612f9d5c1613093b6b4d0b0fe98439a074b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:34:21Z), 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/AUMGB1700396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb82a3464b6c229b1ad11f9277d779cb01a391f5bb393ab82ff90b75bb88b1dc. 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/QZK6P2098280.