Ralf Baartmans (born Roosendaal, Netherlands ), better known by his stage name Ralvero, is a Dutch DJ and record producer. He is a part of Spinnin' Records, the label on which he released most of his
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 0xeeabde52490a9e59144a7c89628e1487195bb4865d53eca142e6d6749a7b62e6. 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/ed36d4a6-6e9e-4926-b406-152cad628727.json and https://artists.proofprofile.net/proofs/artist/ed36d4a6-6e9e-4926-b406-152cad628727.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 0xb8b1a6f54de8669d683c90c923235bcfb57972f5472b4583edc93a6d32b4a094. 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/NLS241502060.
Party People (feat. MC Boogshe) - Vocal Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b3fe316c1d2b4281a2f7b1bb8ec6f0dd40b672c183ad628ab510d19c7c1206. 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/NLC280810514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5535cc10c5c31b7832e48867c0a283165b0a07a212fac598205d33ade50764. 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/NLBW51600138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e437402a2235b8df55c1a2d8d962c761b1a040a4d3a54dc28680b7fade4068. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLBW51600144.
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 0x83bb999499520a7f88e0b17cb095eadb00fd67721553b69ebb5fce29daa8d482. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/NLBW51600145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4802f6e2cf70dcc1e5b097a30a069c9536bdb76799ffa81c71a33a8e21f3df82. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLBW51600146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757dec4d27ad3f2fb5e95c29acf11e459bf37c307116dc0aa8d388d9a0cb1d54. 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/NLBW51600128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3f47d15c5bdaa9f37608d484a524f9f15c718bc845654490733f2465a03227. 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/NLBW51600129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c387d51706d577d384f8a061e14c2e3b2373c0866d637d5048cd843e577163. 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/NLBW51600108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b11595f2f6c6399cbe5e162190cbe2da6808bc9268548afadbec50e7fc79d4. 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/NLZ541600902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c5a3b0b0c8c44b8b2e1f04b5904c3161f832434b699ac85a83a308f2ac1cd7. 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/NLWV71500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7992919520f9ae1df75c4de3137239e1d655a6198a72c216e3732a011821ecfd. 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/NLS241502327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2d52a65d024595d21dc10c9c609f9f3f2848e64b155ce67ffbe439c524df47. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/NLS241502326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945f788df92705c084bf2a723f30a40928fc6bdb202a5e624e5756c47abc78c2. 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/NLZ541500630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f52fcd74b569e5667760c598a5d55d4a5b68cea39be514f43edb2480b4a21c6. 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/NLS241401670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d89639f517c4f0fb83a510eee76ee45e9a7fba1377e2d6a1a14fb7f58146c7. 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/NLXV51300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c6075c8a58f835ce7a8102851c56569d0ab43e8cab8d5976b8d5be0810d025. 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/NLXV51300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a9a82f19c752a402007e7575c8a2fb14a85351a0a241dd87f896d67e319712. 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/NLC281112327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586635be72241653e5bc118ae27720c01d8fa946504cb5a7d0437d3946d66bfa. 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/NLC281011130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef71c580bdadfffa8a988da9cc0622a74597429b86a73e378dfc63ad0bef9810. 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/NLC280910221.
Party People (feat. MC Boogshe) [The Remixes]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef63cb8e19a4465f8755b33dac9986cbcd279c312ba751dfb35364bb5e19e7aa. 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/NLC280910013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfa90c9306ee59e9121225fad1145b4e090e86d2c2c89bab9689da97962e750. 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/DEAR41880806.