thumb|The Supreme Court of the United States is the highest court in the federal judiciary of the United States. thumb|The separation of powers: legislature, executive and judiciary. The judiciary (a
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 0xd08f8ebc03d97c235b4f442222c8772db4300dcd06541b90731520611606e269. 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/7040044e-4ff1-4530-8965-806cb2be23e6.json and https://artists.proofprofile.net/proofs/artist/7040044e-4ff1-4530-8965-806cb2be23e6.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 0x701270cf8ba75f2abb3af73506fd54f0003be2437324156e0c9ec268be700299. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM6N21885013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9b4bf92537ee46fabd8d0138197e07eb9efccfa44de473548b4b6f318f5377. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QM6N21885014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5265d02768e4c10b788f187fb3d4d2952072bbc9b357cebf2e6b33d6e1454641. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QM6N21885015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21377612f4daef40cf22957d7b3f9d9c0419c0e5171d460e54acdf245e857fc9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6N21885016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f01a2b73e7ffebdd74293f19d5548ecdf430d4ecafcc9fd8a43d68c995d762c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6N21885017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cc2db1b8a87469e0d504c75777375462465a15cd1c3ab38382be85dca8b6b1. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QM4TW2222044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1445ef028924b42c354c4d99d1f14076903b7c609ac68c85b76c3e03fb7bae2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM4TW2222045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae25ce235fd6978099a0488c8221c05542145d7f0776221ac2d2188bacf07cc7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TW2222041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cc2db1b8a87469e0d504c75777375462465a15cd1c3ab38382be85dca8b6b1. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QM4TW2222044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1445ef028924b42c354c4d99d1f14076903b7c609ac68c85b76c3e03fb7bae2. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/QM4TW2222045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3b6944790a7e2625709533481101e49e8a1edd6088c8c46dfd27328e54f8a2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM4TW2222047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb81b3c552f032e27ec6ed41fd675e5a775771972833dbb813e6001e24a3fa86. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM4TW2222048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2e08ce22ce4fdfe980e37e03c41a115dbbd46b3eb4efeb1f54dc1f86b584c6. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QM4TW2222049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2537d64b3e58b1a1e0919c3f6a35ab9977b2834fd7ae75e3ac567e0820a0535. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM4TW2222050.