thumb|right|300px|Kurt Schwitters, Das Undbild, 1919, Staatsgalerie Stuttgart Collage (, from the , "to glue" or "to stick together") is a technique of art creation, primarily used in the visual arts,
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 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 0xf443f237b76e993baa6175b2f1973af8da1da3e583bebb8cd4c63a18b2aed712. 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/725267c6-a8e8-4ce1-a3ae-513736357faf.json and https://artists.proofprofile.net/proofs/artist/725267c6-a8e8-4ce1-a3ae-513736357faf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Due ragazzi nel sole - Ma che faccia da schiaffi
Lei non sapeva far l'amore - La notte era alta
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 0x959e7fdd61671c22b82888a0754a81f4483b3933873514c365b1cfbdb5c7f895. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITN731791001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea585c5551e14dcc0cd2dceeb16799d711ca0d8ea0c08e50959fb1eb292e56a. 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/ITA619713047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3594f0e56aabf8a180ed9ba7cd8c30aa6f7a2d33180619eadad463381da0a893. 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/ITA619713042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a0c597335034d6cf2f8e5023d9c54877a0789906a6a79c0c6cc2454f6c10f5. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/ITA619713029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e608abe71f1a478e39a703d02ccdf9757e9666a45a258c1b6af4c7e4278e41. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ITA619713030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7030f952206df405f666aa0a2524eab3de40d2c8cb4d6340dd5dcb4437f7e884. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ITA619713032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3d91f1682da3ae097cc2815acf5e193b271f456ad0de2d4c18a53eff879c7d. 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/ITA619713034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24a01fd87b4c4eed3056cc2a9fed8e624f78d49c7770240a714d3938b3f928a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ITA619713028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871348d3f14b1710e4b8217b457e9e5425e77414049db682fc070e874f29ec30. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/ITA619713037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554e2f80bb548ccedd34a89fa8a4889f8bf4111222a4cfcf456f62956a0ae914. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ITB008070638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076cd9681482519b907597326c76c9eb7d1e42916b434d0c752fb61cff6db325. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ITB007770562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a2c70d8b419898d8887c956f7542456b2b7a95e27164abb70047303c035d3a. 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/ITB007770557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac7e0d055f4a0a57d459a8018e9de8fdeb61c0d00e1883d58d287f68e021f9c. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/ITB007770563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec344f1300d79d3cad242e43cafd06c0e7c8569ec7e4ef32adfd6fc40dee1f0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FR6V81119352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27d1a692e1180cda52401deaa6773e20ed2b1132075ab62a76d79fa074e7236. 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/ITB007970527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c516e6634b953be542e455ec648065fe46940df4a67a0d1d55336e3d1a0517c. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/ITB007970570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e7cc5eb9f4ab90a33c6ce908d6c8dc1f62bc4d3f9e0aed1ecc069e3f3c5e30. 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/ITB008070666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbeafc507cc3fd91d0b28dbb9b577819de063cba96d6103508c75ff23aafb35. 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/ITB008070639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c3b4aa8d2885060aa17e1fc7995d57dca592c0dfd4a8e2c986f94f2500ece3. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/ITB007770564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43a3095c08cb0b479bf3cb2bd3434e162bfed19918acd718ac62205fea83e00. 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/ITB007870563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554e2f80bb548ccedd34a89fa8a4889f8bf4111222a4cfcf456f62956a0ae914. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ITB008070638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d4093ea8aa55cdaefb15f2da6ecc3d42b4a51ab0860aca74f9191d78970cff. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/ITB007970524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc805c0b920c3f08cbac1886789c99d34ac17e9d82e409c5fe0863b91cb58ba65. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ITB007970530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076cd9681482519b907597326c76c9eb7d1e42916b434d0c752fb61cff6db325. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ITB007770562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73daca851c5468935cfb7ac843232c2aeed6811231aee4b5ed9bd12f1c15934. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ITB008070731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0575ebc5a033e8d2096128131400439a96f735d64616217394261618b9f85436. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/ITB007770560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6683bf3f0211b0ff4f855c6844a3b33ecdcc7d30e4adfff59bee0d339b85f649. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ITB007970522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac7e0d055f4a0a57d459a8018e9de8fdeb61c0d00e1883d58d287f68e021f9c. 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/ITB007770563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5622621a114d2a815043b7fd5d628b20903b556da7328eb8dde8a54c466a9fd. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/ITB007770559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fbb300f37194d770e9547d720d3058bc39bedab0c11acb6577a64a921309ea. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/ITWFV1000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba38d08679850908b85151df8ead5af468aa325a0bfe70c635fab584af6176e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DGA052061637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e469382f70dc11991e95a2f13ba4f79a8a634ac3d5e232e30f81c1b9e958ab. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/TCAHC2398840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0016a1050eb09029a0c80c98547314268476400875d91c13cfad04880122931c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBWWN0801647.
Il meglio della musica italiana anni '70
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fce929bcefc0d94e5b05d5d78047705a03e536d4b0b46b2a13c0e1a663aa95. 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/ITB007870562.
Ti amo - I love you - Je t'aime - Te amo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddc85ab98ec4e4e42c80857aa4f7edf34863bada2f8d0eb10457f9430dd2bbb. 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/ITA619713038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185735d992adcbd06933eb69c234fb0118aaf02c4d302b08f89a5dd27e0f4bb5. 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/FR6V82326886.