1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x362fc9a231829f108dd93fde647ff40be560a7640e028a3adf14bd9241e9a1ec. 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/57a462c6-720c-402b-a393-a0c1949f2ffe.json and https://artists.proofprofile.net/proofs/artist/57a462c6-720c-402b-a393-a0c1949f2ffe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c4578fea8631f98040cd9275cf5d7f71c48dd9a0ef637f7b43677e2c11ee34. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5Ru9OjtEw5htfnVKpYsIcv.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5Ru9OjtEw5htfnVKpYsIcv.
{"copyright_id":"0xa521aff098ca70548d6474e60b6c2fad45a0f509a280a5ca2cb3eea697b37ee3","isrc":"US2R20500384","name":"Travellin' Man (Remastered)","registered_at":"2026-06-04T07:39:49Z","spotify_id":"5BAwVGuohBVscZWyoLCkkG","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa521aff098ca70548d6474e60b6c2fad45a0f509a280a5ca2cb3eea697b37ee3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5BAwVGuohBVscZWyoLCkkG.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5BAwVGuohBVscZWyoLCkkG.
{"copyright_id":"0x67da49b2a82112795a7ba8c4c854c6fcfd3729b017fb9a2b1b42dce85b602507","isrc":"USRC11500813","name":"Back Home (feat. Mos Def, Acyde & Yams)","registered_at":"2026-06-04T07:34:59Z","spotify_id":"41FxRrhwqe2LvFcU3WapS1","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67da49b2a82112795a7ba8c4c854c6fcfd3729b017fb9a2b1b42dce85b602507. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/41FxRrhwqe2LvFcU3WapS1.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/41FxRrhwqe2LvFcU3WapS1.
BREACH (feat. Ty Dolla $ign, Wiz Khalifa & Mos Def)
{"copyright_id":"0xa449aeaefa632bcd3b7a63e20bfed794225a533984cbe46e968536c5dec5032b","isrc":"SE57V2412151","name":"BREACH (feat. Ty Dolla $ign, Wiz Khalifa & Mos Def)","registered_at":"2026-06-08T17:32:11Z","spotify_id":"57cDrEGSRqV2Fn3wcA5rPu","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa449aeaefa632bcd3b7a63e20bfed794225a533984cbe46e968536c5dec5032b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/57cDrEGSRqV2Fn3wcA5rPu.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/57cDrEGSRqV2Fn3wcA5rPu.
{"copyright_id":"0x432bd6b215d561b0350cbae3476d579f5ed44e158d42971dca0c79f871f8ac80","isrc":"USUM70749097","name":"Drunk and Hot Girls","registered_at":"2026-06-01T15:37:46Z","spotify_id":"7DRuzSlhjKadgdsQRYZ0tr","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432bd6b215d561b0350cbae3476d579f5ed44e158d42971dca0c79f871f8ac80. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7DRuzSlhjKadgdsQRYZ0tr.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7DRuzSlhjKadgdsQRYZ0tr.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed1f010dbfb3ce40e4f35fb753765581a07ec057d0a3059efc85f0e56b31a0f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3bhyo2ED5Yd4RLydQBDtD6.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3bhyo2ED5Yd4RLydQBDtD6.
{"copyright_id":"0xede0ba3ffaf6ccf32ec52da1d43a330a741224dff0f9e910abf32139d991718b","isrc":"USDJ20300915","name":"Two Words","registered_at":"2026-06-01T11:15:49Z","spotify_id":"62wtttQzoIA9HnNmGVd9Yq","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede0ba3ffaf6ccf32ec52da1d43a330a741224dff0f9e910abf32139d991718b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/62wtttQzoIA9HnNmGVd9Yq.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/62wtttQzoIA9HnNmGVd9Yq.
{"copyright_id":"0x19d520f775b3bc1d7b9455fba2528f6defc0d1dff0c7226732a577843945bd7d","isrc":"USDW10300643","name":"Wanna B Where U R (thisizzaluvsong)","registered_at":"2026-06-08T09:34:49Z","spotify_id":"0zTCd6n7fB71WhuMnvmjIS","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d520f775b3bc1d7b9455fba2528f6defc0d1dff0c7226732a577843945bd7d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0zTCd6n7fB71WhuMnvmjIS.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0zTCd6n7fB71WhuMnvmjIS.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88d124eccc601b5abe5915c862d5b528e97d8172419bd427957d9ed4ed84135. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4rGZwGoaTjF3XeO66EO2gM.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4rGZwGoaTjF3XeO66EO2gM.
Jay Deelicious 95-98 - The Delicious Vinyl Years (Originals, Remixes & Rarities)
{"copyright_id":"0xce37364f50fad6c543a9e19ee8fa105d5223bcb3642fa8b9a695acd696548de7","isrc":"USRW50200035","name":"This Means You","registered_at":"2026-06-06T08:46:20Z","spotify_id":"23QOOlr3qphVsucvoXN5h5","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce37364f50fad6c543a9e19ee8fa105d5223bcb3642fa8b9a695acd696548de7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/23QOOlr3qphVsucvoXN5h5.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/23QOOlr3qphVsucvoXN5h5.
Sweetest Fruit feat. Mos Def (Produced by Anas Canon)
The Day (feat. Mos Def & Jay Electronica)
{"copyright_id":"0xc82b77fe2d4b88d33182ce56b235ac81c1875b84dab6b59a4c05ae42b1a347f2","isrc":"USUYG1141489","name":"The Day (feat. Mos Def & Jay Electronica)","registered_at":"2026-06-06T03:50:36Z","spotify_id":"1mmeFNd0C1DIWc2shOO7Ht","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82b77fe2d4b88d33182ce56b235ac81c1875b84dab6b59a4c05ae42b1a347f2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1mmeFNd0C1DIWc2shOO7Ht.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1mmeFNd0C1DIWc2shOO7Ht.
{"copyright_id":"0xa63454379f662173e1b08923512f9311f512da989d0581c03c3ec1006a67c268","isrc":"GBAYE0903021","name":"Stylo (feat. Mos Def and Bobby Womack)","registered_at":"2026-06-01T10:13:59Z","spotify_id":"6LUfuyLgvgqrykiTE6sJHY","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63454379f662173e1b08923512f9311f512da989d0581c03c3ec1006a67c268. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6LUfuyLgvgqrykiTE6sJHY.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6LUfuyLgvgqrykiTE6sJHY.
Sweepstakes (feat. Mos Def and Hypnotic Brass Ensemble)
{"copyright_id":"0x17896d44a2ad8ee6a9316ab8eba7a6d5579aceea5179b5ecef5250084960817b","isrc":"GBAYE1000016","name":"Sweepstakes (feat. Mos Def and Hypnotic Brass Ensemble)","registered_at":"2026-06-04T10:00:31Z","spotify_id":"5SM5amC17V4itA5jxIICjS","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17896d44a2ad8ee6a9316ab8eba7a6d5579aceea5179b5ecef5250084960817b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5SM5amC17V4itA5jxIICjS.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5SM5amC17V4itA5jxIICjS.
{"copyright_id":"0xea737764b185f7595c9987facfeaac8057cd26bb98ab803243dea1cafac3dc31","isrc":"GBAYE0903020","name":"Stylo (feat. Mos Def and Bobby Womack)","registered_at":"2026-06-11T22:54:59Z","spotify_id":"5CHpwiiISYdU7r3RBe2Sol","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea737764b185f7595c9987facfeaac8057cd26bb98ab803243dea1cafac3dc31. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5CHpwiiISYdU7r3RBe2Sol.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5CHpwiiISYdU7r3RBe2Sol.