thumb|250px|Four aces from a standard 52-card deck An ace is a playing card, die or domino with a single pip. In the standard French deck, an ace has a single suit symbol (a heart, diamond, spade, or
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 0x5d66c900526ba9b0c536c2ec26825d0ad4b1f4336efe7771bf433b2bd5e1f2db. 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/1e5e2194-ae79-4356-b690-58f3c71c91cf.json and https://artists.proofprofile.net/proofs/artist/1e5e2194-ae79-4356-b690-58f3c71c91cf.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 0xb4251218ce4a251ee4fa682d784b5f11a4989e6fda2cdafa852cb7ca73f12b97. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITA871166012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d5a52753c65fc828cec2cc0e5a60d086423c3d06db2f21ffa6a0fa74fbd777. 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/ITA871366004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe55b3203fc9751671d9eed9f7123f517cf7b03b4674b118300c465e5d04a4b8. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/ITA871510901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c8be36cbdc7017661e346b89fa4c4bc29021416303e6d2ad6053a065215b21. 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/ITA871601011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccb129ea4cc975dd3cecabc6beceacb155a0e539b6151c68773fe7af71769b7. 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/ITZE51800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca717a9501cba4e1273f8ef82f19a615538e3a59322dfc37255c5444be9fba6. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:42:51Z), 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/ITA871510401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23c7180177b49a3c1480e166d85616362e32572339ac75990a50217f565402a. 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/ITZE51800339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccb129ea4cc975dd3cecabc6beceacb155a0e539b6151c68773fe7af71769b7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITZE51800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d257107f5142f1b2a6f356f6d299f46bc245ffa83940ae0855bc2a5f038a74. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ITZE51800338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360e4ed813b90b49610a906bca6198d881d984e8b3239a3101357a35942f9913. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:51:09Z), 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/ITZE51800080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207e244e61fa5d387312d75afecfbcfab70636408810627b9f85c1d3be2c4236. 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/ITZE51800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920be7c49364eac6c146f588d5fc04020f032095d1ad9ca1b0adea6f1c8a394d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITZE52300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf7902c64deda1ea61ce1a71d64e2f64d9e585a151d2cca181164dd1f47c3cd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITZE52300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4471b8dde2ea8e0f0fa5628f08e442a2f6dd52f0318b931fcccf9d613cf1cbf5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ITZE52300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198ef0f837e81f8297564fb59d32f22f6454bc608e2f918849ffcd170e107e98. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ITZE52300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad8d0b178481b84e5fea8d19227e085d68d15685d1ae1e69ad7f642f724444e. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/ITZE52300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b85903a2bc6e912789f8d679338f543e7409aa3f8433db3667328cb236f0fa. 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/ITZE52300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe176f3bb7dfc2fa42b42c191812f1a5bdb4e7618b525863d318b98fc6ca8b876. 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/ITZE52300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc7b66fa9dc6a658dc06f1b70c16769fa4814c7d555546731c1e3689cb26045. 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/ITZE52300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585c857cf8c7c993ba3e5025658b978b5023636a53187a16d1e2187870f1aab1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ITZE52300047.
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 0x2f1fcb03fa0347435a66c7d3de030f83d1cc8b2f03595ddb7431208b0e01f98e. 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/ITA870700538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf53c7f9328a7a8ce1cc2dd432785e407eea5b8fcc72b312e8ab2af82243233. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITZE51800255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c2de29899352ec7d8a8e10b099cb79b4c2d0d9e2c675f3840ad60c8224b911. 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/ITZE51800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d257107f5142f1b2a6f356f6d299f46bc245ffa83940ae0855bc2a5f038a74. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITZE51800338.
Eurobeat Kudos 2020 (The Kickstarter Project)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b752d3d7f2ae9b66be07939c2582f0400a998640d9df902a3416f4bb3c22e6e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITZE52000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb22fe63357e6a6b77a778ed422b0d8abdba2a389679ba4a999c4002fbb59518. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ITZE52000084.
I Won't Fall Apart - Ebk 2020 Turbo Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bf00cdc3a3cb08ebfd11dae904f95ad0590d8f3797cf99775ea453935fa912. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITZE52000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3647d7c2aeb8a36841944b099a0988db142d27e4b1b65629207fb8b73efdfc. 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/ITA871610310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f8e26747bc974d92e11ea7703ebc3b58a1e4fc3f160d88527eca98ef4bd443. 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/ITZE51800215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae56299725d933f4588c5a5a6ae8e705a964959e43a59712875b51668d08b33. 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/ITZE51800254.