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 0x31b5cae6633d7827252ef4415cdd161178183b694052c820faa209804e357a73. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ea00462-4fd2-4d3e-b9bc-0ca9b89821a7.json and https://artists.proofprofile.net/proofs/artist/0ea00462-4fd2-4d3e-b9bc-0ca9b89821a7.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 0xfd535729b866fcc659d0d06d51b5923aeba81cbb944cc9843c0a6722fe0c165e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFM2437641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55eba559a8432b4405604c7e51cfe7d1ebe9516ef3e998e7ce8245d8799d416. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZNWS2515848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e7b4d0eac5119918bfb3b75a4904a77799a91d431101c522c74bf5178ee6f5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZMEQ2531418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73de6571c48f25e5ecdc77206c8b91cb96330404896922513acf39bbfa2de5c6. 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/QZMEQ2531419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e414c7c22e094e8f77e486fe4ba3b520d266988792e1fe68108ed32c080708. 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/QZMEM2583002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276461228e1e995c18a158d506e5d297282fd2ab2e02d764108b1f1a342a5b3a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZMEM2585281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9b2c64c27417fdf3e1efa6535dac12ad6fda17656b101fbc2def00c90b8a16. 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/QZK6F2532651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeddadbbedf0d94644800f903002e2815b439699319ef3a6eb571c5721eca533. 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/QZK6G2510476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f7fd34e5d9e8021d58328f44f738d734859e4dc78b888789f45fb735889aec. 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/QZZ7L2458831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4493e12e12ffa28d595debc30934ddc7a3eb93be3eebf5d44390600a11795032. 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/QZZ7N2408351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87020d5ec45e08ac3bbc0757591f46a2e421e26234303f7d915e999508c53380. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZWFF2483048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f1e47e4d74bb63c4f55f51a721d9cbba10ea77c97fbd0f8502220a11aef7e2. 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/QZK6N2480326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4000cf501b961794cf5570a694595c7ffa15fc93407782d2d08ea56b4c0202ed. 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/QZK6N2481456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018d593a772a24346f808cb1c71b8bbd801f45232dcb7c0ce27f2f17ceb044ed. 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/QZK6M2409256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91dbf7c664c63e437de7ca5821c60d883717e810fbbb896cd04eb24645aafb7. 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/QZK6N2481460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d1ac3e8c6bead1a2797920f4ad4d8fab1ece08a2ced8eba1b858885c22175f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZES72485677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab59b476954ca05185eb5893dcb038de51f5ad2d7c0c73eb29920b07e58ddb49. 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/QZFZ62420571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14adad5b1ee5ffdc7dcc659b2d8deef5377f4432ba1ee9c7451be88384336096. 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/QZWFN2314848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb188096ca6443bb662620fccd7e09451379dec734de08ca8ea7fac68c23fb1ab. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZWFM2375854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa19943a05583102a034196c9baa48ba9859c3f9766a0422087e71f4364adfdd. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZWFE2382315.
Hopp for faen (columbuss 2023) [rullebonus]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653223a1b4137bcff04c6c220c87e4665bc5ad91886a5d6239468c326d0f5ba5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHN82321342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0ed0525ef7a4f8d87d71f52c6f1a25679b42c8e31044a34095c5a222598c3b. 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/QZHN82321343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167deebcd74816db7473312e8143c92cc8acbce69e94dbae29097504ea7b2ace. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZWFJ2539239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaccf0399251ceeb7b2a8f78ac273430729739a86ed267c9fc0375e96b352f7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZWFJ2539240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6baf513d96b486a79703bf07dffcff6ec24198f85e3ef53a82f210529e18418d. 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/QZWFJ2539241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f84557f378e1e9da40bae2cc2df409f7c915ccfcf10cb22292dd0c543b6314a. 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/QZWFJ2539242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63423980572cb7e4926219dfff8dbeaac8efcf269711b0a4a0c7057ceca79dfe. 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/QZHN62406120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2a6c2e849bb386de4319cef9a397a34bfd298f69cf43982754ec8d7e0ee773. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZES82493153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9503a1fb72fbe769cc3309c8cfe101fc01d4abb5859f96d3537f69eb86a6a8c. 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/QT3EZ2589703.