Dirtcaps were a Dutch DJ and rapper group consisting of Max Oude Weernink and Danny Groenenboom, based in Amsterdam. They are best known for their song "Foreign Tongues" which charted on the Belgian "
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 0x85ef9f72f19692eaf004f3687d630c2ae5a3a05946a0f26bc54f0b6058d3c2e6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c77ef4ba-0876-4876-9a0b-593bb8d3a442.json and https://artists.proofprofile.net/proofs/artist/c77ef4ba-0876-4876-9a0b-593bb8d3a442.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 0xfcd83515c1a61b8ffed6c54d6bfceb5655271aae9387b7d5f65a919215e79912. 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/NLF711701431.
All Or Nothing - Dirtcaps Extended Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd674df6240053e6d6697e4bbd43412d1207d0e1db3280ee8bd2c84e630a1060b. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/NLF711701464.
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
Deep House Hits: Ibiza 2018 - Armada Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faba34ddcde4c8e43727fd7eed719362d3a9f1b1af658cd19b919a7dd0cad1d. 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/NLF711802677.
Don't Stop The Madness - Dirtcaps Remix Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dbd455246fa9a5e37b30344c78f865b88494237011374529ff29f6143aa571. 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/NLS241502448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faba34ddcde4c8e43727fd7eed719362d3a9f1b1af658cd19b919a7dd0cad1d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLF711802677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6998249cad9e990de6365ea4114530d4536a537430321a9eee7225b2290c3f7a. 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/NLH8M1800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c527fba393eebf94e5bce453b492b8a08cf10f988cafa0608199a2df76cc509. 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/BEB681600284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c527fba393eebf94e5bce453b492b8a08cf10f988cafa0608199a2df76cc509. 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/BEB681600284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01019d1c2e3fd4c4d7b40ca66c9cffac3bc42a290f68d3a6c0e655654a58d0ee. 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/NLBW51500147.
Yellow Claw Presents: The Barong Family Album
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d14d489efe7071c6cc80e7197d057a1fa734df8868a2fd4ef3a96a7b6526ddb. 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/USA2P1690194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21553be64ef87c0c6777f709556236c3675e8c9036f714b062a117df2d24fd72. 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/USA2P1690198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dd30d47a4471656685acc309a22f611b8634633822594dd57f3e069763d270. 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/USA2P1690199.
Ride Or Die (feat. Kalibwoy) - Modestep Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20af985656fda53e0e598dfa735ced41d51691bd1baa41ba0c46c7307ba1b357. 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/USZ4V1600142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1991d87719358c0097ad8763fce62d6d28e3c8bbb7701ed793d154ee261bc2f7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USZ4V1500205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa935f11ffc481a37b1c2e19567a39f35709552cf645153fb1613de5d71fe0d42. 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/USUM71703900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41814671e3901cbe334657535e706cd3fb43fa0088ab12bd298109831a5a8ab0. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NLS241502433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4af952c0053ccb283c030032786b77ceabeed5763cedd7e2fdb8760e99c60e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLF711700280.