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 0x17e3d0e410a88e64f4d7d93d02a33d89e8b4718d1e653a4e1b1e412111f019f3. 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/fc4540c1-c978-432b-8874-337ff6a6e57f.json and https://artists.proofprofile.net/proofs/artist/fc4540c1-c978-432b-8874-337ff6a6e57f.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 0xc725c98d77fb83b65e9bd43890667fc56614a1cf1a40acd6967328773a4e2fbf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6K2331314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5905b8f3990f97b9b490872c3a62ccb17e2b44e845a8e2581b2c3929531bbd33. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:10:58Z), 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/QZNWY2338122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea4e1062cadddc1b907342d9d52916db803957a73bb4a9e36e75c744090f491. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T15:41:30Z), 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/QZTAS2324286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e724e9690bd4900bcf5e124889e9ed88e1042e8105243873e06edbf8f0034d4. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:50:24Z), 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/QZTAS2324288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2353cc6c496a89e17001fb3f8193889b1efb5eb5a29117de36ed087739b682. 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/QZK6K2433095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4b4fd55ca49709790beef2f6ddf69f9526b26ac90cfad793b90d4ca4136a89. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6K2428702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df38eb5d2f374505a8c1725176159b833b7f8137f8f1c11d019ec2b883d4728. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6K2415625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2b4d9359f94f5ccac8683e102835918c06daddcb3702e885d8aff94b9c01ec. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:39:15Z), 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/QZHN82449024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40faef7670825160daddd5887de1d999ea6370fb41b4433dd898c2e181837cda. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:23:18Z), 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/QZHN32445518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf64c698b776c5f4e054969ba3de7c64887ac8b5c5fd8e2c9e73f4fd3e4224a. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZHN32446316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f02fe0d73b7d22ee50d5c5c596d11bb356258425865ce56722fab822612682. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6K2415626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4622be0b57faa2c8d9dab867c26e3141460a41cece42a5e377c29839b2e5dfbb. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZK6K2331315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48d9887b263eace4762a43715eb321e5c0bc46481ce89df1f2dc0669a7296ba. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBC2464990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3ba132d7cd8b1a035c75dd5b83d65466213844de413d8f4c1b27fbb7b921cb. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZTBC2460568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b02cf3ae24a85c0a85c5c4db28e0ab9cd2a99d3b86bbe8c6c4429ea14457a5. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:40:00Z), 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/QZTBC2460403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e1ca561db6df76ec75df58d6ea08c578e7893c6f73ac40040255bc26f17ebb. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:48:53Z), 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/QZTBC2453568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54110daf7215189f561b4d1f53bbc7f84770a6f1c605c1293ae3799c6d8248bb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFN2447096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131e8d664e92b31f1305a70f8d5c41f821b6e7abd776c98e6dea1d709e036087. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZWFN2447098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fec039c8fe618cccab574689770d058144c56733b7f3fd98da284773729f16. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWX2558975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9f0f8f9c9110e37ef304d4f50f06ce6ba4433dd4d662e0cf9a2c5a92ea5b8d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZNWX2558973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfc1db8b49377a811c2f6696a53bab0368fb2feba0e432c74fa198a685d87e1. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F72513860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000bdc7eda99ad1acb03f305963910df86ef02bdb77a10b76909ef857fd6ab2b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3F72513863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff77ebc5a1294e1a1c976e3fbc51592ecb3799499ed03bc14f5e804924fc73e. 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/QT3F72513865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0f9e248a7558719300f1504e65e97085948238b5d0058327b39b06ae813160. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT3F72511573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07321148256dba4e7c6a4ebb76454c92db5baa30581abf5e71f19d9fb56cb69d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3F72513991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e7a31a7c49afb6a4b249e40ff22197086308d586f15055ffd3a91d33db1fa9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:04:54Z), 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/QT3F72513997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1690116f7a7223e14abdd1b2588b9d304b1abe2b22de1f023ea18606eb793522. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3F72513974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3e0f7fc86543a96446e2fcd3eba6b9e3c57c418cc21da3212c3719b4a9f531. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3F72513964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1ea3b9143057d7776661ad86a8153eba6ef447630368af715d2aa18ed6add1. 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/QT3F72513961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bf246e9be73254348f7ffb0d56c3a92a4b7069763d5c2ea9575f38ffb6329f. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QT3F72513914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcc74e521c34ecb27596099cc95de91d8fa6c6c660299f881b973c39e1cf236. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:15:31Z), 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/QT3F72513970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd881ce7bd10701b40b35a88ee4b780b2dffb06df01f6908935dd6c6029c588. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QT3F72513855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d704004353a520da7230a29fc544f674e69f1482283820a7c94f110c00fe02. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QT3F72513853.