Double You are an Italian Techno and Eurodance group founded in 1985 by vocalist William Naraine, keyboardist and producer Franco Amato and DJ Andrea de Antoni. By 1992, they had sold more than three
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 0xaa6c90bc9291f1c24e1f5acfcaaa142a4c48bcf286f7a1ed8329e6107c4d310c. 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/69234b56-57c4-4ec1-a41f-a53f4dc39ab7.json and https://artists.proofprofile.net/proofs/artist/69234b56-57c4-4ec1-a41f-a53f4dc39ab7.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 0x825a6306f28b14cbd58d47ebcd3770232a4542ef619da865ffdb60ab082d6884. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/IT00C9202002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52536b28ba42c7110da3eab9c93688f0e1c25f3b185b6b36484c79adb13ef722. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/IT00C9202303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cea548bb61b610468f04165961133f1944c8cf82c9d05d7467beb769d8d357. 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/IT00C9201501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167578a0f3aceff70a07170bcff18e29b7bf14810c61c64f1ef5f59f9a3a7d6a. 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/IT00C9202101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd074bb60f8d7838ecc81b8dab2f2c3582bc942c7d2d30341d1f68e114235536f. 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/IT00C9202201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488c906c21846ca2e2639fcea9b0bd991d647d09f50cc618d698a87fa4bca0ed. 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/IT00C9201801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d693b680d7ca01d2b5c5509607632b4ae1ee4299042bb59055db9962e51ecb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/IT00C9200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf69e9376938b941f12ab97b4a5edb3b3232c8a52839cdff9582e5626dca15b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/IT00C9200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab809744c6f5d4029621c16560fb5e76ba0d629f09ef20e965b7d64aa7d3274. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:08:20Z), 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/IT00C9300804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74c9906e93426cf117e9fd991345bb94586ec204effd244056c77ad91ce5767. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/IT00C9300801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9c920c22f3c0c9a41018c7be9435f16e01b0649e33502782b4e9d3181dda23. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/IT00C9400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5025ad14b6755352f191648ff89ddb80896c7086caafb6d8049dd4b7ca40ecfc. 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/IT00C9400701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43579a911c8386299fd2631b963d7e92ddbe0445c442953466b006feffc79551. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/IT00C9300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb3a493fb3f82f937ac32fd37be6fc897f24b14d596ba46bc94c6a77b4f5947. 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/IT00C9401201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc645fe982fe536366dd88073ec979195b23c3ab3e8905b0678e9f151f3909c2b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:50:26Z), 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/IT00C9401301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8b85a20ad5827b4c4d49f81cd076f14901dcea02382d5167ae1200097e8e4d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/IT00C9400602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab809744c6f5d4029621c16560fb5e76ba0d629f09ef20e965b7d64aa7d3274. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/IT00C9300804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e6ccf328ae8c4041e34be307da1eb2c73b9d06264e9c5bbdd8cbc6317a2718. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/IT00C9300602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe56719ab6be67e2634c08fdb328c6f97c327f32783651f60aa09458cc19613f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IT00C9500801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b2eb09351c19cd0ec6d958d897947e6a538f83d9a2c4c4faa8390f58434f0c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/IT00C9500805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fd2331bef06cd7f3388ce2981d2777ff543071e9ee1542f3e74a85eeb94a58. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/IT00C9500401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937c4b46c196f257ce5e70e25650c3f5b310cf6b29bf91a686a9896da0f0d11a. Chain 2 (Bitcoin): anchored in block 957839 (2026-07-13T10:06:30Z), 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/IT00C9500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba3c51e61ee115b7e48489b7b7efcbb62ea41d99d7e3c3d05d2b43ad268fef6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IT00C9602401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705ac573494166c79833bbeed6ad50e12aa53ecc9108f6fda09ab78708001b08. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:04:39Z), 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/IT00C9602502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71333605c51368646bacf442d87d8039334f1bbbf0e18e23151af2d3dd483f0d. 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/IT00C9602701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f95d03ad981529c9a5a652035f1667456f7a6d0cc8def3af83a30a1e6444a4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IT00C9701013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9c920c22f3c0c9a41018c7be9435f16e01b0649e33502782b4e9d3181dda23. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/IT00C9400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9622fe1353ef187ab9d399d50e517fc1cc54ef75c5c4630b39617fdb16df08d. 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/BRUPP1000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1a772348dad7608a69421847f2ab6b3f8eef2194f63351a8e1a68726b919f5. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:43:24Z), 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/BRUPP1000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb992a4ae2085e0666599f6e836cb7d4fe42591b037751154f00000515f54e36. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/IT00C9400603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80553c8e19b1d4eb7fb66f296777f3c8decb5623419712d4211ee90bef58cca. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:09:30Z), 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/IT00C9202403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678ab96785ebf9d29933998c9c07d704dc0d9172eb8a2d0bf85e73ba7d11737d. 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/IT00C0000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb9924d6e6427a359b74770a4e1d54fdc33a196c1e311e3ff859b22125f8527. 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/ITS132200191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1547c6f410f2ce8843b77303b2e81fc1fbea237cc3c6bb5142b5c1d1f5c25f59. 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/US5PM0910015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e9ba47b67847738b82f0b9a1110849fb4f61683724e21b22090b9d857c4a37. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRTSC1800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02ae681ef447e605b6431841fe6d8d95b44cf5e4b26456233d6469885876ead. 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/IT00C9500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02ae681ef447e605b6431841fe6d8d95b44cf5e4b26456233d6469885876ead. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/IT00C9500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb533df82f384af3744f691253d59381eebefd9bcd147f7f2af27d7b03a5652. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2524596.