thumb|upright=1.3|Ludwig van Beethoven's manuscript sketch for Piano Sonata No. 28, Movement IV Geschwind, doch nicht zu sehr und mit Entschlossenheit (Allegro), in his own handwriting. The piece was
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x0e331894d6940408087419a55e52e813aab8ea1dc6c42a8ff1d42fe601dcc413. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f972d8c2-2532-44a1-b804-a84f52a2030e.json and https://artists.proofprofile.net/proofs/artist/f972d8c2-2532-44a1-b804-a84f52a2030e.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 → block OTSBitcoinBlock must exist at that height 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 0x19866c4a4de87c8d828a168fd5ce1afaa63f6f2a8f9cb4bcb4bd88bb4b9c69c1. 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/QZES62544941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb55aec7ad495577c1c6dee2879947e9ae89c98ee8e0609a1cd8dfa247146fc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES62544939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0499916cb9739443e7f00a1b58cbb801d708b9bb64bf0f486a1fd6637b16468. 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/QZES82581283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197d7eab609aa1e23656199d6f4b6c78b7840ce194c984d994ab4871f04739b2. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZES82581273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2feea7ac2c942079e23e18b3f5a468ffbb85af4b5f8a5a1561be81d79858816d. 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/QZES92536593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b1ae4f88e527a9b219464615ecf592ca12e7a68e48b1b32c8bcb231a3b3a78. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZES82578644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4a88605ac98058bd2474ba207c98fa75ff6b1a06ee1adf7f88c2dfa7bf98d4. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZES82581763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b1d171f53c756d4a79ee13dc4f07eab03e76db0fafd9a58fd88327a72632e4. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZHN42518352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd00fd870ec04a60bc7ca782ddafcbdd856e383d1cc57b3ae59120166977e5c7. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZES92533955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd0b31441becc49286876a609e6d9df27abf6b695ae40a4309a80a1de0d380d. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:24:51Z), 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/QZHN62596128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fef3c779dd93fb8ba66aa0f45c4ef28f839770124f97305d1a3c463b29199f. 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/QZHN62596127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9087c04fffa661ecfb9f4530b91f11cc56441c43c45686c8a0336e0b4675d9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:02:29Z), 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/QZHN82582193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1addee0876a645fea7d19db41eb2c3ae551b31de409a7474eaa5e4f6465be74. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:52:57Z), 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/QZHN82582190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139c0897893b712b52bf2dfa216e9c46e8bc9fb3bfd556c6037946e187ddac8b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN82582214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb81acca3fddca4100f93f3abdf5cf1914f610934a06f1242b31fe504b37fb7b. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZHN82579118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2793f7576addc8dd9e061069639b9f2d2780d7ec029cedc8b1b4b06c7933f4cc. 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/QZHNB2547798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2f8e6df05413375a89a8ffa4419ba913598bf5c753cf614882c6a3ca80674c. 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/QZHNB2583907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828af76c64a517b95900050310424d146c4c8040252a4dd368bce5b6ab58541a. 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/QZHN92546459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b35297fe99e0d54aeb4dae720e09adfdea74dbf3a7bb4fb2ea54f9bdf0fa43a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:16:17Z), 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/QZK6P2551330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaea4be4a555f2430eb38d66b53aa9d51ea2b3543f8b112157b3e4783344c6a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:48:41Z), 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/QZK6L2527638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecec96d2998c13c4e46279a07db4367e9232f832e99cd9f7b0e0d11eb1f8d896. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6H2505988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2890117e66047f50cb12718717d88895db2c4e7721eddf1616d719f2fc576ef. 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/QZMEQ2516201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c33b2d1781ce6d5931398ce70f1020f5df194dd19af1bf0a524abe133334fa9. 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/QZMEQ2518091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dadf196aa65ca6387d1b58ba406ad522d47d31568e9f21744d39f077781fa41. 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/QZNWT2522247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16873eea05e20d514bc4b6d63f14f16f4b60ef6923842d2c014ef0457baac6c. 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/QZNWT2522255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d7abe7f67610f76953dfe8d4af720f053cb9532165b2063e6c1dac476c0897. 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/QZNWU2540481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bac15dda0f96e16fc34125a457b8ff52219976f80747c11636bd29bd7c72d2. 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/QZNWU2538597.