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 0x647f6906f4afa26a4170b543983ab8ba15c203f3f1202484103f00c4140a6983. 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/49c21717-1dd2-4f13-9761-ad0758128ff2.json and https://artists.proofprofile.net/proofs/artist/49c21717-1dd2-4f13-9761-ad0758128ff2.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 0x63c47bbcd6a019328a57e02e923c7222eb614783ec4210173ac6760d82a1f8bc. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:09Z), 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/IELOI2275652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02e5122c94574bef8552eca3e8e5dd646a4a915eba9235e36269f5b2b3b22d7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFYX2340447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0925c1fadcbfd5bded8ead77d37c32aad4226a457f89fb416b32f31a2db7e936. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:01:43Z), 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/QZHNA2326471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00fc58189f68bac8b50b5df7889e4f1cca9706ef5206e7f4066f953ecc5c155. 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/QZHN32428222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1713f03cdb60d184e1e7cda00890d0b6f3d383b5fb428dc705d27a30c16c3764. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/KEA9R2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad8de62abfee6d9e7cc8894e42ea781b75ea49893a66e4906237698ce308101. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/KEA9R2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c4e8325008f7086976a16b967d670bd3d1e96f91c2951688f337877cfc0dc3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMER2480118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15199adf0af72ce6eb5d08d2d7bde877a7ff3f37fafe29d94a16593c2d7b5955. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNWX2414477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fabe64739b70f56a48f3c7e036953134201045aece6bc0d2e0937fb3ddc922. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZRP52432413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabfb043747f919cf765e41a27759ae02d1d27ae3c8350b64dd76f5db7d292ac. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZWFG2440572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68ef78a2621c5e5f0201a347b4436b9d0712b82efba5685dcc51e4186e33bb5. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:33:06Z), 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/QZWFN2483725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdd98ae84f7e485d68a50689ad5ab71edb378e378812d320b3c065ad37919e1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ762493686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc7dc63bc387c7d4e4637c5ea6adc7cc68712f3b5bc51a16826805167d9d3c7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7T2441544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa027b478a8db60b256d155e7562e9801bbf26b0c552d5ad61d8abf88516aace2. 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/QT3F42417000.