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 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 0x17c4336c90c1714c27317f92fe02de4a625ed350e41de64cd57ad46793cbe5b9. 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/cc9b3808-84d5-4bff-8a89-cbe4c8679f69.json and https://artists.proofprofile.net/proofs/artist/cc9b3808-84d5-4bff-8a89-cbe4c8679f69.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 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 0x34f1986f50354ca43e3eaccc9d7a65d7bf67650113b111f3a35359c832a4b5e8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USWFQ1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8038d2a1416219c0b579474daf97566fc9450309113a7cbcdbbd0025255084be. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USWFQ1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844507687cbb81ef7f86b850436b96af83741c78d1bbf654a18a9dbd7f849f60. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USWFQ1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2e403024eb3e9f8d646a169e5c9370b392cbb5e66b3e7a0d7d5294a9f9dc86. 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/USWFQ1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8511c519b6cfeecfe380457a1debdba0832ba12f314832f43c8844b4ecf812. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USWFQ1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8154f72c46c1771a1254046b1d55610cab0f8141b83e52d8e07e77becf5d753a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USWFQ1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadb77afc143e387a8b1f269a0b37df7b4d0770e416d65939555b829034f4f24. 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/USWFQ1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd879f661446cddb7f4b116936447a7f9f83ff88680e3177a5390e1d946a44cb6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USWFQ1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbc74051987ef3bdaebc84be5ad0f6165f98358d7f460a52abb035852066afe. 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/USWFQ1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46910c30f625dfadbacecc498f6c8440fe57c3d17bfebcaca4277ba8e7339887. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USWFQ1100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c6a5c2d192ef4458be45855370c7e419e74131a9884856f8b7366d96acf8cd. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USWFQ1100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042c9f118d3a0a1ffae98c11ed628187398792c3204d7a7b78f2c0be2440a786. 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/QZTBE2478154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724bc1a4c137cec4764c318063a7ea61acb84bd471a9b44416c28ea7bb62d604. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZTBB2461049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5187c429d99de7bfd7496ba5f9fce5127be839d2b56d21915b4e9f766eeee014. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZTB92420581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf5a13fd5c53de38865666398c36199787d5617b872a0b0748b00b5a956f430. 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/QZFYW2056678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d48c6cc03416f7b4d13fea5d233c16e2842100c1e55dcef56df00dba174087. 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/QZK6Q1996129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73da5f90b9aef2b749a8c9284bb04545be8f4d429f31343d1e99735e5efd8669. 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/QZHNB1969637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab28b3b693496492e6adfb9679f6162ba25a94b1dda65303600a5362af25fc0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZDA71908710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce63873ebc6c45b98310d308f15935342dc4b5f85d66e12b2b6bbcf8e24e859. 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/QZTB72301774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa727cb8a8b6817be387836c2b291643c2729f792f2f4cd3f1b5ed8c8a3e4b820. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN31959925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4923e220eaed491237b10dce93a92d78abcb2a4103bcbd9b2dff6b0bee6f072a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA71916840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b334d5b4a0e99558393e852617d706be08d63ca00d2a08cf58029d57bf9161c. 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/QZDA71916073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4a63b62a8d4604684e2265c8169b29ceee3d466943915f60b60149328289a6. 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/USHM21398357.