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 0xbdfd14b8acdac7d061566317069c4e5e68e0d05c9f2b66c0df3270ffb1823c67. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad06db19-f93c-4850-924f-c4fdf774295a.json and https://artists.proofprofile.net/proofs/artist/ad06db19-f93c-4850-924f-c4fdf774295a.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 0xe9b83313e592791a9f8ee06fd9bd50f8eb67818e52a3c9c137ab741426f3ce46. 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/FRX452421596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747b051c66675e31793b251818dc6eb36cdfa6c7001a3d99d0aa027842bea40b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX452421597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099e1028651e3ec39a89e174a4e268e3bf9a7263d951357922af8509f7953002. 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/FRX452421598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb966eb1f00670298265d690d5ffc1847687081eb39db2f0d6a5bec84a1d54b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRX452421599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda04a56ff6c80fb21cdd6ffd0f6865d34f1dcb434446fd2011a10c6a1fadd2de. 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/FRX452421602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408038adb663d9ac96ae85f489755dc06548f3d34a71a84bea9eab95a6fdd306. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/FRX452421600.
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 0xcd662ed9710fbd7714c9dddf3fecc27736be34b90596b12365b80752898b2ef6. 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/FRX452421601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805bb97ab415b1b38c53e5d5aaac66dbcf2f001a403d62f08ee394e83d488328. 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/FRX452421603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18880b96bf65a89568b031c732b4efa8c3c86e18a07734c5e77a08ef0368441d. 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/CNC221500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6b0977cb2dfd8fe7fc7c8bfa452f2413d32d9947e2864e34d9f0a531f8c393. 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/CNC221500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe945164995cc6ed7729878071130cbb80128c2bf508133c7e029c600f3ff92c. 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/CNC221500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb96387d9cf97db12ec3b0a93cd58e0644805ac1a16c5795c22d3e039d0bd0b2. 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/CNC221500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd859f78e2ab4cd5ddd71db5b1aafb928e8aa981dc20a44b410efc1ac21dfa1. 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/CNC221500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4c7e8f584638d4573b72598d795d5e247986ae9b6f9b21ccfafbbc688cd449. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CNC221500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a176a6291c60e4743e9f17724dd9fd6f1137e9d3958d6ee032e1e8f48d9671. 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/CNC221500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d743bbae1ea330405795660d791252aabc7911337b60e5d8abffb268ec3ae7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CNC221500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93384671da6b25f98b9b44ce194ba5fe3b362b66eb85a017080965e4cfcb4686. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/CNC221500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f146c6f0c1c6bb8dbf65e250b61fec5726ecf998e73b4c8c6a30a5c858f2b1. 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/DGA082310543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b8e4558fc71b2d99c0dfe902384011e106ce094e81de206fb9d6bdaaea7d89. 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/DGA082397001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384611c28d683286c303a54fde62ff9bf79c114e5b4edc8ae95f2af50cf859b3. 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/DGA082397002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bf663fa3c8681d269172148ba2bb6a2e9ad6868e2bdd9fe1b8f961dc4b34f3. 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/DGA082397003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cd2493d52252d456dd6db85980d7a2d507792562f055a35245e423bb3d7e9d. 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/CNC221600072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc478712507b0e2cc6d7950e88d47b24f3a48a861b53d208f6e915d7bfec516e. 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/CNC221600074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470478b081c7360638bf57a73c14fba0a6ad89ac70d5af9d9629cb5c1fc1c17e. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/CNC221600073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5f2b2cc18aafedbca652c8ac1448549ebb4e41df967dfa6da6c71059eca605. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/CNC221600075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815f67d61c2c55b4dc211c66aaddc3712cd73e1a9e5f9a29518aea114aab1d15. 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/CNC221600076.