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 0xf0905908a4c28f763d9bb3eac92b9994da6263cf195a12309d0a354fc4a2692c. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9edf9bec-efb7-44bf-8b78-73f51a1eadd1.json and https://artists.proofprofile.net/proofs/artist/9edf9bec-efb7-44bf-8b78-73f51a1eadd1.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 0x5e58e9dfae72c69c5185596b77f1bd0a44a17c752637cdf2b65f32d6854c537a. 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/CH6541630030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0cc4ddf84a6eacf18be6edb2e1acfc4ea7ca2f4d2725b0b87a874b07d6f0ba. 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/CH6541630032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e0dafe0db1a8121e1a51259e1ee88a9952556e8cd34b3214e4f52ee9dcf14b. 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/CH6541630033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486c104718c06bc17723d3a1240f0666017e6318c1f77c81410c9a81c42c69b8. 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/CH6541630035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5a38da1350315f9ae092832ce70ca45d6031e377746fa18c6871a06ceba72c. 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/CH6541630040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4eaff9292385a6e8f877166e38aa921e32b14f851cc230aeeaca87cace8a0d. 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/CH6541630044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1241cfe1e85fe193e36f62c8ef69937ed2e96c23ef00c8060009b48aad52ef31. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/CH6541630046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c13c2daac02a0cbf8f837e20247d2639f6d87789eb8cd6f4ee3f6c3147233f2. 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/CH6541630047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0815a941c48c2f39f1ab56d960e1550c4be6345c47d2f843525aaee26614d4e8. 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/CH6541630050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42a47379beec3b51088c9f2e4ab48bbb3b7468019cb39e1a0b087b1595d6ff3. 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/CH6541630026.
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 0x7bf53f4cc71982d31dc35783a538df2a48d759fd082bfb9ac7c7b8a0a487916e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CH6541630029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d95a11a5ce237cdaa176d5df6e8ae95a27b17f5af1c6a6c9b102feaee6ba027. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CH6541630038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63a1d6b96d84339652c0de72db1281d584379e80facdf2baf37659e1f9f868d. 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/CH6541630039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8767a1f132feb4f3e0fe6c4842f9cc59360e8d986b15915e8acd4f33cc0ac2. 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/CH6541630041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11773dc33eff41bfec3ae6cc8fdadbc13827b4b48796d835054515180ed0ae99. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH6541630042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38908087cd8d5f4cc54639bd2172c66a30b13f94f9a9f7ff24772354a0a0d9cf. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CH6541630043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4487ad1e7c640fa1384fe1cb8b7962fd08ae616dd8314abd21632a9e9421214. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/CH6541630045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c4e85259c731b5ba096a5048672e51dfa1626502e8f979b42c785a519753ef. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CH6541630048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b02dc694ddc004bf28f04fa20bcd4f4d523d70a930f4b252666e9a9715bd24d. 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/CH6540821575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe765f2301eb168e6e2c789cf6b8ca2204528d08a179e0ef502edaab16090214e. 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/CH6540821577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298e5096f6d26aa0713aa8f8ce5ebaa3ad9f1fe96c576461b629391959bd1d16. 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/CH6540821578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb539838da815250b601a3d679d628cbe437e49e2810fafe2084122ec42f23e1c. 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/CH6540821580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24b52bd199e87d0d86a1a6c09c08d840d09a9acc38ceb5b17422ff858a67ff1. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/CH6540821572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65d9e99078f100648dc303651887051fd0ed04d0f93a082e851002af66e0257. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/CH6540821573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfd2e7082a927429b886187b890e316829d8a43a373f4fea509f65395b59ce5. 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/CH6540821574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa15a6f6de50f982c8851fdcf94a8870699f913433bac9a3aa8b69c4be525c1. 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/CH6540821576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9814eb0d041c70a26778434cb839d4f223037ca2a485806d43b093aa6907372f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH6540821579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c10877cad66f30429c6309c4d3c6f290224cdc3a9c7c4ec0e63e16f875cb9d. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/CH6540821581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e46825c1bd240eeb9305828fc0f94d27b23965ac4964d1b7b616fd7c30f9af4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CH6540821582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983ce93d3c134b7ae8dc9a56546084ed5054ae1921120ee9c376a20e10852d82. 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/CH6540816902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b82b2b7a6b9c994b1759b1045071c0e8e859854548e47dc8a3cf2f6e489b8a. 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/CH6540816903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea6861c663ce02d3fbabdf3a57a12a1b7b9af6dd7a2e3350fd31d5114ec6672. 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/CH6540816904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0018c1316a48fb91036b74e76cb029935e3fa26b594e14c5bafbc1c0b607f45a. 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/CH6540816906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626580dbddb6840d0966a1530d34c2eada4478094659c135f53a661762be7b46. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/CH6540816901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17c14379fece5651be43c94048dae066f16a88271fd2c95c7906c767db0a281. 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/CH6540816907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d62ce93da7c4f669d573d83f91cb6ecc47442cc77d649d39e16f79bf6e8fa27. 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/CH6541739361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13453d247ef3d6c0d6d98494dd834661a6d7be48f8b19bd06897a81dbbb43ec5. 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/CH6541724266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef922f6849d5c309308dd31e314bf1b43743a4628fa65fa7dcd1045b096f024. 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/CH6540842863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9225b265703ca99d9cd07c1c644d6fd68cee9b0e6f315bf6f829e57818afc950. 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/CH6540834415.