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 0xeb8bc48e74545d3b1f6bb031308dd42973f172250eea5b85444f84350025ae5d. 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/586433a2-240b-4131-8141-7185bd5c0234.json and https://artists.proofprofile.net/proofs/artist/586433a2-240b-4131-8141-7185bd5c0234.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x4d3a6d9e497ab02fa279069d0d1dc9df49c75a02b8e7ce29f734434353fa745f","isrc":"GX3Q92364411","name":"Aura Freestyle","registered_at":"2026-06-10T14:43:46Z","spotify_id":"6TIaJMV7ZDAgzkTCcVdTSR","type":"track"}
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 0x4d3a6d9e497ab02fa279069d0d1dc9df49c75a02b8e7ce29f734434353fa745f. 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/6TIaJMV7ZDAgzkTCcVdTSR.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/6TIaJMV7ZDAgzkTCcVdTSR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff5243eb7427d6a0e34dddae881531ffde40fdd4d849cdf0d59996f9ddb0db5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5imBdGVQMVyxfsI4KPZFyy.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/5imBdGVQMVyxfsI4KPZFyy.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f0f315b75cfae4046f540c7adfa2487e2de558c6d7a76a38eb22ee3a8d6040. 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/7G6sRV5w1dXw8vJ504gBNl.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/7G6sRV5w1dXw8vJ504gBNl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff10f23f44fa10d52eb8f1ea5ed7f9431e8869f6acb478c69d47249751cc1279. 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/65T4nltZbgDSXnLq6Rj5so.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/65T4nltZbgDSXnLq6Rj5so.
Rondo x Ridla x Fumez The Engineer - Plugged In
{"copyright_id":"0xce62385aac97e99411ebbffd5ac85ef9419aa437f018a37fa57953fd004d6446","isrc":"SE6QE2215690","name":"Rondo x Ridla x Fumez The Engineer - Plugged In","registered_at":"2026-06-05T21:32:03Z","spotify_id":"6JlG8wIyMLw92sc4fpXM9m","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce62385aac97e99411ebbffd5ac85ef9419aa437f018a37fa57953fd004d6446. 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/6JlG8wIyMLw92sc4fpXM9m.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/6JlG8wIyMLw92sc4fpXM9m.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d69fdbac60bda167944e73bf1c5ef7e3557eabb73785c4ede4ef0747625065. 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/30Wsj5zDKIl0ymOs2d5kq9.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/30Wsj5zDKIl0ymOs2d5kq9.
{"copyright_id":"0xdda5df52e0de0b6271fb2d4c76eb91a32312dd7be8a6ecbf5db714a888a36f40","isrc":"USA2P2125571","name":"Next Up - S3-E32","registered_at":"2026-06-23T23:24:29Z","spotify_id":"5BKUjHaWHqYAdDcP4IMGfG","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda5df52e0de0b6271fb2d4c76eb91a32312dd7be8a6ecbf5db714a888a36f40. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5BKUjHaWHqYAdDcP4IMGfG.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/5BKUjHaWHqYAdDcP4IMGfG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8864fbc11d99acf6f5c00b1188b19de469dd3fedbc0a10e1943f007ce58a8664. 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/7xM1rLnO2dzuzZhbH8NVxe.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/7xM1rLnO2dzuzZhbH8NVxe.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe042d0b605d7953b44a2dadf39d9a3140963ffa2e963982a7a8a1139b4823530. 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/701ONEsNMngkoc5sFF1Ohl.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/701ONEsNMngkoc5sFF1Ohl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ef55992b33fc789bf26ac10739683b472f59814f4b8b49d972b3a488329104. 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/2Miq5IElJpoRhz9qdwkEGq.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/2Miq5IElJpoRhz9qdwkEGq.
{"copyright_id":"0x8f2546bbef5e7515c8519c8b6c309c9ab2e7d75dfdd2c241a0fca32ec81590a2","isrc":"US23A1554359","name":"Plugged In Season Finale 1","registered_at":"2026-06-07T20:10:28Z","spotify_id":"0dUu2uMIAzFfiuDwyF1Itp","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2546bbef5e7515c8519c8b6c309c9ab2e7d75dfdd2c241a0fca32ec81590a2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0dUu2uMIAzFfiuDwyF1Itp.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/0dUu2uMIAzFfiuDwyF1Itp.