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 0xe89160b91cf1fdda444f52fd172e6c148d581f4763d1930911862b225f7006ca. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab7ab01f-a332-4900-a898-3d1f39fb4fcd.json and https://artists.proofprofile.net/proofs/artist/ab7ab01f-a332-4900-a898-3d1f39fb4fcd.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 0x5b5732ab71a3bafd7cc8eb48bf6c407127b49125c9f129f051022ce5bad92e1c. 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/USA560595058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bd938a5aaae3783e7b1386d984ceab094888a45585722c1cfa1c5bc989095e. 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/USA560595061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2d7d4d8d24389fa3a1b435867a0647f15a0398c7900e1ce572e35a2be3b2e6. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USA560595066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adbea2f16abccdc381b9a3ea2b3974aea1ca9ae4501eb9abd541aa7b6b35550. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USA560595069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0507b43af4cd5420f4b4e33b607a92c5aa0632e2d3edb61defee7fff1314959. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CZA490200272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5918e6121b6b28400dae2c3bb613ba93767adbaed2d4585ab3ba8db0c0cd15b6. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:03:41Z), 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/CZA490200278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f2ea894cec56ebc17bf6de31bb36c3f6a714c1a59c892e56a33ca71a972795. 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/CZA750424603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8175ad8fcb1070cc491c109a3b5c00ed2dabfb624ace1cc080e44ba05ad811. 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/CZA750424604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fba2ce65573f2d3e5b7c2d4a8d4604f06d38bc9b08384dfb590732bf1fc005. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/CZA750424607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29644ddef90421868e3f4525e5d45a8ba0160c65f7fce6608c8fec0f1b0d3f3d. 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/CZA750424612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a0ef6263545b955ce33b25a716ded77165eeca602eebecacfa885b535a14b8. 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/CZA750424613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9690b5a621b4cf78770b51ad1ef90102ea19537ce955c704dab314e12822b1. 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/CZA750528002.
Leží Dáma Na Kolejích (Lying Lady On The Track)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdae5a7c082920725dd2fc52bc02eef1b97495be8ed882ca44ca7311c170da0a. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/CZA750528003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3029e66855a7483a1bb2892b05868f4be7d7beac8db2635353423888ee3a2035. 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/CZA750528005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e9b94e1b5a230a10f973b3821d78302fc26672ddba6ce71e14bf06dbf150bf. 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/CZA750740504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0f5031382b73d7bf7daed23ef3e4a1ccb9f75f15b3abd73206e8d7788afc4a. 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/CZA750740506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c138f03e38cce19f8a7f341b3cce24f0ff151f36554a8e6028b776488ade49. 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/CZA750740508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7ca52783defedb2806b075cbb9aecdfad4000e5620a47f05dd95a1a21ad9c5. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:32:36Z), 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/CZA751046001.
Pálíš, doutnáš, nehoříš / You scorch, smoulder but don’t burn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf216d5eed92995840498ace1afc100a27f95374f607633529574542387e80e77. 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/CZA751046002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb680a4190b3eb55dda404f9ce8689482cc4a75a97f28e410fd95cb5d8c622a42. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:24:27Z), 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/CZA751046003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bcfbe5e565d94c6b0b5557e9c92105f46655131957c8b61ec1219158575444. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/CZA751046006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a29d1e785738e338aa8e54c2d9ec81535c96344c7bedc948a9f5ad43a51875. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/CZA751046007.
Obešel jsem horu / I went round the mountain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d41f885c45ab1c4ddc7d624d93cfb465f93a02295eb6ec22c1032a0f9705cc. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:10:38Z), 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/CZA751046008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399c95ead40c6bc2b3672b635d07bf08d3bb80c70129a78be1b9e21cc1792f72. 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/CZA751046011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cb6e47b0a05896641f481600eb66ce28144c5aa33c46bd1304ebf59ada3c9e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CZA751149008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ad8dba55ad35d9b297ddafc214ec90f09ddb576f77679919b9158213a7c123. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CZA751455004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7722e4cb0e72001576f43ce624b9ff0c7566cd04ac52145ab63dcae60b831d57. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/CZA750740501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f624475592f1b3ebdf9fa93bebe135b1bc95d4f78063c3e140ab0a840d9cdc. 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/CZA750740512.