thumb|upright=1.3|Hamada plateau at Tademaït, Algeria. Photograph by French explorer Fernand Foureau during his trans-Saharan journey in 1890. thumb|Hamada in the interior of the Cape Verde island of
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 0x94f398be4747d09a98091c1e778ff0e5441b2c0f1e41a63df696c5d25a4de0ca. 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/19c40ed3-c154-4a51-ac93-b9a164b937fe.json and https://artists.proofprofile.net/proofs/artist/19c40ed3-c154-4a51-ac93-b9a164b937fe.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 0x2e623bbd5af62eb59ed1adf6318b56c709813b3b741e088610153bf31ee3b495. 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/DEA622101455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39a33adb9a13a560a392103d73efff7b3d9b5cfe91c31fbd8274cad3a626916. 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/DEY472275177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62369e85869d0871558f47025e6bd8918d3d758e5fbbe8ddc2b45d9da295a43c. 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/DEA622000569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb634ff6c2c0739f35f37a580f1027554ab9edd3b1fc35b39f8ef2c176c6da471. 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/DEA622000570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c98f7ed5415a801c5d2e0138aaefda71c7f0f30bd07004dbd88fb8a2c0d5d4. 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/DEA622000571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd483cf01a838ff33b5956f82105629d03b1613a6bcb3e1a883869979e074cbf1. 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/DEA622000572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fcf786a22c133993627fd7a38254d190c19ced5f198185c88dfdcfcd2b9ac0. 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/DEA622000573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d74d6b85654464eae54293050042a3dbf2f19fa10371b0ba25b42b85239581. 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/DEA622000574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7def2a7797fd14d951f5eb299a9b95989d4756baa5a393626f1ea1303028d7ff. 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/DEA622000575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a24127b8cc30e9081041cd6ec53ecef8ad82c31a9340caa63f5232d7ef994f. 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/DEA622000576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942bfbf7bd85ad7f4aeccb7387c1b5d0d7911e9230bda8d90ab4f09eaff15350. 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/DEA622101461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d558deff586084a7b31669d1bee3aebed45859c9f6ca1accf9c8ea885596b5. 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/DEA622101458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b6f7864a623f2a33861f68bd9fb1b9a9c9d2df9584106b5fba975802a491e0. 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/DEA622101453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f56e5b3f88441268a9169d9437ad4e999eb8cb13c90442da7f2c70f78bfb6bf. 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/DEA622101460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e145effcdad36925b73eb0d7a8969998fc397100c83ef0303e07bbf2a22e008. 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/DEA622101448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4396fa8cc332af61d84fc4e4ff69dda4edb1744995d66f23b14509273c484d54. 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/DEA622100654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd483cf01a838ff33b5956f82105629d03b1613a6bcb3e1a883869979e074cbf1. 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/DEA622000572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62369e85869d0871558f47025e6bd8918d3d758e5fbbe8ddc2b45d9da295a43c. 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/DEA622000569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce723683ee67f5969dc1861dc932f0e40fb0846ce37bd6376d530cb2a3bf04c9. 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/DEA622000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768295d27254f0061be00c58e970a9f9b92500553386fbc751f5e557b5677e68. 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/DEA622000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a085a99f902b175602962b4eeb9003c0eb2162491abef862795abe98144e32. 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/DEA622000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac83754127dc05b4b24d6785d9e7d0f3ff01cc9e3c93383112eeadedbba4a8d. 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/DEA622000161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe190467f5ffcc8dcc20e9448f5212d2c60a8ddee525da4d995120f0ad8a525d7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEA622000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a7431e0c6c7a0732943800a2fc36ef334439f8a477796172d8e534c0488fd2. 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/DEA621901293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734d20bda639632edc6a0482482808ceaebf45f8528e84ef1cd4c4f3786c45aa. 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/DEA621900980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bc86eff5757729ef14e8539aaf2cf4c89d9445e8b39be27cc3e05c3879139f. 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/DEA621900406.
WIR SIND ECHT (feat. Hamada, Hemso & Brecho)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2e2c2ff9cdc72202424997147a2f872656bfa6557a590f33ce2bc749c43d49. 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/DEA622101093.
Vatos Locos (feat. Sipo, Hamada & Play69)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513660f65211b637da82b4dd4f83ecfa200d4f59e3cb7e3ae912347787e54413. 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/DEA621900341.
Illegal (feat. Hamada, Quantanamo, Dabbl & Play69)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5274aed516a548e280ec780d0dcee78d3cee5f80915553baa7aeac0f975550b7. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEA621800025.
Illegal (feat. Hamada, Quantanamo, Dabbl & Play69) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d124a2d55ab2bdcd21777d5bf1ee3373fb26d645b6d0b4b27b8cd5cd37cbd95. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEA621800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5274aed516a548e280ec780d0dcee78d3cee5f80915553baa7aeac0f975550b7. 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/DEA621800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d124a2d55ab2bdcd21777d5bf1ee3373fb26d645b6d0b4b27b8cd5cd37cbd95. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEA621800030.
3NG (feat. Hemso, Play69, Hamada & Brecho)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd181e5f3fdd543c88565d5a68382f09e74898a49f85f195f40c4438f6e1e353c. 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/DEA621900838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e95fac6c714eeed869a614c3611a3fc67d11ff373b0d091890a064aef5dd8bc. 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/DEY472377599.