Prezi is a presentation software company founded in 2009 in Budapest. As of 2025, they have more than 160 million users worldwide who have created approximately 400 million presentations. In 2019, the
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 0x7c462b9aabfcec931a263f759c38c0478fd004463db0bdcb2032c0bc1f88cb31. 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/85951710-ead9-41f6-815b-dbed8a970cb5.json and https://artists.proofprofile.net/proofs/artist/85951710-ead9-41f6-815b-dbed8a970cb5.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 0x186aa52fa5062a5175179716140c7154f61b053e322b3e1391181f60c820dafe. 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/USUYG1219828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8405f83f58abec2854d8d6196982dd4806c194d14b22088977468b165b3291a4. 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/USUYG1219829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcdc89e072a74b37a9d5c2ef522f8d9976d3cceca3e517999d3ec598fb1f205. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/USUYG1219831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d2026c5e5a74c78b576d4131e9c710a5728221380d8dabb2b1b21310b647df. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USUYG1219832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff5c2b8253c3deef2bc72775863cc1d8d88dcca0c2fd8ebbda9c03d7080fa3a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USUYG1220025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecd75aa309b8e563f593cf4b1c984e755d1c7db267053cf08e7198181dda2de. 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/USUYG1220027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd719700f835d038689189c0e82b88ff7c687e840b18b0319c07714af7865a5e. 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/USUYG1288919.
How'd You Learn (feat. Philthy Rich & Omar Kadir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185f44b91cd86c42ac3f12c7fe98b9acca4e2547503a3f0ee25f49fdc9478b16. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USUYG1219843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361d1948722b8689da6c053e2395620b787e55257dc1f71f29d6b1ddf88d8b24. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUYG1171148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41d2be117901fa1becbaedf01d2c0078121f3ed3f6eb117353f94510fa14865. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USUYG1171154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa5cbe7f3275af76d5b0ed7e3415c48c5ce59ada61a0e2da3a65bdc8c7ff731. 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/USUYG1171144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c52f3d763870de54a93e9ff9559258b7c854b063b2384ad36b2a919202e4f4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USUYG1171150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55acc22f97eeb40f803163f8cd61ec0a98924f68863105cbdee1bf65865d683e. 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/USUYG1171147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad910661420bc879f5536754ee50cfb9bba9e714982a18b75a6a629ffeda29a9. 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/USUYG1171138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a90da938a1d12b9125337f244cb80070e6bae247ef199a42cf5749b66e3273. 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/USUYG1171155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1a8b0af66cacdd3059d2a4d4b05f1ca84e11200dcf399035a5fa4c5ecbbc1a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USUYG1171143.
Do Better (Remix) (feat. Philthy Rich, OMB Peezy & Mozzy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb2d0b75066d443f624f11ca13d0dfa58c3eeaec50441e8993cbc437948c798. 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/USUYG1171145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97bfd11ad43d6cc67196debc082a81848c054364ccee0373cbacb131fd436d5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USUYG1171152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0600b843a9be0f8033a530bce85460d67034a8946c7f7be6e9f8eaf500f580. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USUYG1171141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc2044d264b4fc2bdc71143349f0da79058ca2257e3aa5918ea64cd3313c1a1. 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/QZPEW2468227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3276cffa01952d9d6268a5a2490f4d6340e6a6fddeb43f213fe927836dbf5254. 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/QZPYN2376769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7569772a1d21f6fe55a97c74b980fba1c443655519749132a7c923513e7a7822. 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/USUYG1436437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b3de3236220a7ce24612109e8426d940ca12bdbdddaa451a13a2a21c962029. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USUYG1398125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd719700f835d038689189c0e82b88ff7c687e840b18b0319c07714af7865a5e. 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/USUYG1288919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2c45770e940429b4d0c4bb932acd1e7c072c420ed3ae57bbafa98e2819187b. 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/USUYG1303722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedecb8877628cb4022761f2955171dcd5ce0b0059bb5a775875ea1f5aa78c3f7. 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/USUYG1229790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3377e86978eba53e723b50816eedec83e180cfa65b078526ac3aed2fa881a653. 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/TCADX1843632.
Do Better (Remix) [feat. Philthy Rich, OMB Peezy & Mozzy]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52ffcec7e8134c5e67aad536194ecd4ace88a2e6c10ecc4f65207fe66f5327d. 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/USUYG1171499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0034304c4ba91f665d758f55d64c35997312ea76b4a6340ba04298b8e75cabe0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUYG1152779.
The Click (feat. Zaybang, Lil Bean, KxNG LLAMA, Lil Yee, Prezi & Lil Pete)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b0243fec70de18543a61e213a59900eedeaabbba6180db8aa44a3ef2ed04e6. 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/USUYG1365370.
Anything I Want (feat. Zaybang, Lil Yee, Lil Bean, Prezi & KxNG LLAMA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496b2bbf80ee5187371fc6716c05e1d3b0001fd7f70f184fd8312b0e91618fa5. 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/USUYG1365373.
Bigger Picture (feat. Lil Bean, Zaybang, Prezi, KxNG LLAMA & Lil Yee)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc890dae50738371e148f2c9daaf2067e67c3ad177f9698787b450a5241bbc882. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUYG1365375.
I'm A Dog (feat. Zaybang, Lil Bean & Prezi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1998327d253f76922a648eec70c0f37aa079e88bf2b4d0dc97c372ba2d5e98. 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/USUYG1365376.
Frisco Shit (feat. Zaybang, KxNG LLAMA, Prezi & Lil Bean)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ad45640b8041eafaa9821d472adec64f19c4ebf2089bec74fad85d61c8567a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUYG1365378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257970c0de3c10cb348cdd40e9fe2427df7c6e413ab1e0fae5359df3237589c2. 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/USUYG1154483.
Pray 4 My Enemies (feat. Lil Pete & Prezi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759c6d26f8ff557b95ac1d8f30769827b6bbd314d827be50e2db58114f7c5c0d. 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/USUYG1187299.