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 0x8e1c659bf8c4c4688ae827eeddd326e5eaa7da25c9a66bfba1ee5a5f7b91f29c. 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/13831067-a012-422b-94e7-68bc0e341acf.json and https://artists.proofprofile.net/proofs/artist/13831067-a012-422b-94e7-68bc0e341acf.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 0xad9365947c77aed605d4b70569b27f5a4e5993415a40a147852498087fd49787. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GB8KE1755729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86df1bb4f51136fd6360267f19f1e45284decde456c40118845d1beebbbee52c. 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/GB8KE1755730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3dc29441e01686a96720a1243f71f236ab60e45ec4fa5ca74eeb062e37bf86. 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/GB8KE2411880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb3b40702aa0c125b0d032fdabfcaaa997c9d4c701361bd7c5c9c8cff4b4fee. 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/GB8KE2406575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6a11c92ceb554548816b2d7d0ac2b0d41919a5496f952fa6583d2fbffbad39. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GB8KE2406577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f4019d97a7150efb9f071c82e192c855892983bd3be95cfc5eda01487a57a3. 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/GB8KE2403293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51373a36c77ac8b34177d0f7d7d9363e7b89f060ae3cf54b3a3920cd514dd9e0. 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/GB8KE2329482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a405ae22b544b3c5669f276c548a791997af76d6331d2b1efc68383942ad15b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZTB52348898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2c5d95ac4835908d565f65ab2346189eab4bed450da78e6d212efe2b7afddc. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZES72328162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a37079d7a652b19f2b26623f01dccb8fa50dbd654e7930d11f76bfa031349d6. 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/GB8KE2215739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0f0b308b8e4f274718fe515596406bc4c3c1b2e32ebfde43794c3bd1e380cf. 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/GB8KE2215738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff2addd36ef7c62d4a267d1a77b62419f0770e6f1e1c1369af6495c90bdda18. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/GB8KE2215740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d5dd5006edb59ad73c75990f232afc7fd3f2fde56000dee4317e3acec18c46. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GB8KE2205774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1caa4d244df29cb973228c0a459e1bd4293eebe0c5d056c50575d59e021fde4. 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/GB8KE2205776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960fa49fe4dc71f511bf311b436ad90b1bc700fdd5210f40115b2d7560ea8f13. 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/GB8KE2205777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e10f80ddbe1f426a84ac95413aaa64866e9c442a9381194aa99b98c8619edd. 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/GB8KE2205778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a2049cb35626dc49ceaa86f0f6ffebb04b258864a319b55b941353b8ce100b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBLFP2273338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957610e48ca8a3989f26836d39c4ba6c5a44f921a52283cfc8ebedac6aea1029. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBLFP2273339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e6bcf3f2ecc5fe50eee047c223ade52a3ced94c936b5a4bcbbe09b2e105e79. 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/GBLFP2273340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508954cba34848c64f3d83411bfe77d95192901fe6ce1cc1cec012de937cecf3. 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/GB8KE2203013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f817b31f693780bed85fd37984e0c7663f3967f6d3143fb5cc38e5a3a3f3df. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GB8KE2203015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa523074bc4915b3910482b78c8f64d5e5e471456864919f90a3039950bfd43f5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZKDK2254499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697e63edf8accc1a28916d5db0b87f1aa31dce0ba8899553cc59660064eda3f3. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GB8KE2162330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed818b7b968f8916e18ad7894fc3e50d20e06064eed3659d231fd432b1a4064c. 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/GB8KE2162331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8893ce536f4361345c84579128fb22ca2dede2ef6a2640df217dec7c1eafac2. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZFZ32158800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796d07056fb8bf55861ce4bd03d4edf047f1c998594152089374092d654bfeb4. 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/GB8KE2052149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dd162c533370486ce65fe68e2f2626f886c164c39cf577a4ec5012d7e3ae6d. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZES52026631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0677536b470010aeca251b1ee207d90a46c8bb3ef5b67f9d047452344d716153. 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/GBRD51900246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ed45b867b25e368f4c5377d0b74123a02619c46bb495c6b80ace1da929de22. 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/GB8KE2516799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567549cbae8c253603cfb6ce5e757fd96183449e452e2badeca198d53c341fdb. 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/FRX282529809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b34d5a8a332ab127e521976874491dd2310417a0ba268453728392228ad8ce6. 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/QZS642547751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ab992ea602455e16ec48746c4feab7f17eeb1689201eab88c4d56539bbfa39. 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/GXBNP2402734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777cd9772613081434517ea2effbc2e11c54b9a0f771688e4b6aea1b57bfde28. 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/GB8KE2425318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dadd0eb1f30fe00b70f176a53b18b9e9c4a2f2465eb0fb763b2424d7c8fde6a. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/GB8KE2425317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ddb3f4888053749dbcf6106e45c2a2f17bf27441ad26ae0f76897f1d1a44db. 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/GB8KE2324204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40799298da126c5bde83aed314331d4b27e486274f93895d2a760627b09c602. 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/GB8KE1952830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17dc5d2cd8aaf9c9d0a3f20fad390ff39b335dd2bc7b7ccf4ad1a017cbc4e169. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTH92109996.