Ulrich Schröder (born 1 January 1964), known under the pseudonym Praful ( ), is an acid jazz artist who performs on several instruments including tenor and soprano saxophones, Indian bamboo flutes, pa
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 0xe0eefbb548df37fc6450eee984bb558358e6bee53bc6a54b0db1e6aef3d6dd03. 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/0a40f985-d1f3-479e-a8b9-ef62404f13f9.json and https://artists.proofprofile.net/proofs/artist/0a40f985-d1f3-479e-a8b9-ef62404f13f9.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 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 0x5ac79cfd66fa5894bae9eb5f04f7bc01dbf8a6fd5da575452115994a71b41604. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/NLEH52000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a070b895eaa19bf0bdc24ffc9d974fe1423e8b71ecbae8228bab227f5a3c350. 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/NLEH52100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0ca50da10351579921ef0aec62382f69de00ee10c188aac19a822c912319e8. 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/NLL8M2002067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d015fce97657325a8bab7b5ceaefae64967a4e76c5001004a83c83d86a8080. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/NLL8M2002071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7f5eac642d650bca5f30edf6fc131bb93d076dbf0f3bb94efc20de219675bd. 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/NLEH52100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91979f83c1cc3778de3794abe10510edcf656e6aa29e822b3d36e1e6a8f3cb16. 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/NLEH52400016.
Danza de la Tribu - Kareem Raïhani Remix
Danza de la Tribu (Kareem Raïhani Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb343f35325fa5b4d63fc7f44b587b028634082edd165190bdeff2be256da58. 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/NLEH52200018.
O.A.K. / Arabesque (Kareem Raïhani Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e082f6cfe82c05fbd1544ac400f5abfa7b0e17fcdfb8c7bd85591c8b3191c4c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLEH51900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76635ca90d323de17834752521d19cf7d381effc5ebeb0ec3b0f16024215f110. 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/NLEH51900009.
The Eyes of a Miracle - Kareem Raïhani Remix
The Eyes of a Miracle (Kareem Raïhani Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2327b8d210f591521cb37d445ea6f3a39f5d9064a5807c66d1ace71f1cc7779b. 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/NLEH51400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719c1b4b640dec35f7539c0dab901a119d22fd9555a91c8d2d58fe29ceedd367. 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/NLEH51400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855edad795f1b0e42ce76d83dc0e7f6e102039d7afcb9c6c5a85a3cb0735a694. 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/NLEH52200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb7b0659c7f7d3bcee627385edcbc21cd4249a2c2e4cd67a6b7442e6c045c11. 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/NLEH52100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf290594db4224eab9157b554e942c8c3ee8a0c103d3cb5ade2ce79356f8a109d. 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/NLEH52100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e31335caeef43008b0900434ab46222aa5adcdb6af790d75fec6433c566fa9. 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/NLEH52100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94661fd4ad270cc26a9e46cac66a6ce161d46ad61c557efc8ee9be3f6ac797ad. 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/NLEH52200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02e0c6aed02a5b719bd1282f3bd2afeaff478747ea878197062f0f719e2dbdb. 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/NLEH52200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20f5fdc4f4db5fe7e25b5dc81e89c67209bc78e2cf7d00660a38e350d39774b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLEH51700001.