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 0x63662537991caf56ae0139d6182d4c9b4ce9955de7059f62f02424eeb81b0c86. 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/31a190dd-01c4-473f-9a7f-14b8fa2f8fb3.json and https://artists.proofprofile.net/proofs/artist/31a190dd-01c4-473f-9a7f-14b8fa2f8fb3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xae9fd1f8901b609bebfb0cdbf2be7095700e0b3588e08a0fcc857ba6c8ca8364","isrc":"ARF411800063","name":"Hold Up - Reggae Version","registered_at":"2026-06-27T09:12:28Z","spotify_id":"6E9SLrhbvpxZfVnnjQgJWH","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 0xae9fd1f8901b609bebfb0cdbf2be7095700e0b3588e08a0fcc857ba6c8ca8364. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6E9SLrhbvpxZfVnnjQgJWH.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/6E9SLrhbvpxZfVnnjQgJWH.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2fa77031cdf5c038468b849a5cf96fe2e371b9ed91f84e614f214d53017522. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0BdMvfGIhjP4TEIG3dOBY0.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/0BdMvfGIhjP4TEIG3dOBY0.
Total Eclipse of the Heart - Reggae Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa10d42986183c8d40eca6a6ed325f08cd8a8101adcd2a899aae7ccfe199b84. 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/5Ao22sgwiHjZA7Wx9Pb6aQ.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/5Ao22sgwiHjZA7Wx9Pb6aQ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503ef74d42e7640533c3b0745392917ab11e11745b74032db0d3df306ed06a30. 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/694Kk7GUNm7EdB0bWwTWPB.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/694Kk7GUNm7EdB0bWwTWPB.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc73c467d19396b66f34aa28432806c37a92e93aa8c40264d09e39b2305efbb5. 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/12SkP96w9XZmrkThrOkk7I.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/12SkP96w9XZmrkThrOkk7I.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc73c467d19396b66f34aa28432806c37a92e93aa8c40264d09e39b2305efbb5. 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/0AmhVYsOkrfrnDLm3TRkA1.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/0AmhVYsOkrfrnDLm3TRkA1.
Vintage Café: Lounge and Jazz Blends (Special Selection), Vol. 12
{"copyright_id":"0xae9fd1f8901b609bebfb0cdbf2be7095700e0b3588e08a0fcc857ba6c8ca8364","isrc":"ARF411800063","name":"Hold Up - Reggae Version","registered_at":"2026-06-27T09:12:28Z","spotify_id":"21IgsihbtrYK4bRC1u7CgA","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9fd1f8901b609bebfb0cdbf2be7095700e0b3588e08a0fcc857ba6c8ca8364. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/21IgsihbtrYK4bRC1u7CgA.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/21IgsihbtrYK4bRC1u7CgA.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc73c467d19396b66f34aa28432806c37a92e93aa8c40264d09e39b2305efbb5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2FPaOupYdQFA722l10i4AT.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/2FPaOupYdQFA722l10i4AT.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd36db967ee9d7f2b6a9b87d65540c3b72150ce70ef03f02c23d95a756eacb72. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/433aPJ86sBAfRkfYR1a8r4.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/433aPJ86sBAfRkfYR1a8r4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc73c467d19396b66f34aa28432806c37a92e93aa8c40264d09e39b2305efbb5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5zocerEAMrVuBcMEmC3Vgw.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/5zocerEAMrVuBcMEmC3Vgw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2713699e02f08de9acd9adedc950251d037e123ac8e8f76672b78648bb973c22. 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/3gA2grJuMdoprIzuA2b0fI.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/3gA2grJuMdoprIzuA2b0fI.
Vintage Reggae Café - the Definitive Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc73c467d19396b66f34aa28432806c37a92e93aa8c40264d09e39b2305efbb5. 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/3aaCLitQ9ROY8T5gSMRvKb.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/3aaCLitQ9ROY8T5gSMRvKb.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd36db967ee9d7f2b6a9b87d65540c3b72150ce70ef03f02c23d95a756eacb72. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/322jQqgfQWrpIZ9H07Y6RB.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/322jQqgfQWrpIZ9H07Y6RB.
{"copyright_id":"0x81a21d1238dfe8c75bce92c5b6095ff1797b0edb16476d17a9a73db1c3f50ca5","isrc":"ARF411500979","name":"Girls Just Want to Have Fun","registered_at":"2026-06-18T03:31:44Z","spotify_id":"0BaRB7I4rifsK4iLTTvnf5","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a21d1238dfe8c75bce92c5b6095ff1797b0edb16476d17a9a73db1c3f50ca5. 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/0BaRB7I4rifsK4iLTTvnf5.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/0BaRB7I4rifsK4iLTTvnf5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503ef74d42e7640533c3b0745392917ab11e11745b74032db0d3df306ed06a30. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5HUqTyS7gouo3Jr36dduVV.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/5HUqTyS7gouo3Jr36dduVV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc73c467d19396b66f34aa28432806c37a92e93aa8c40264d09e39b2305efbb5. 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/2Xqnn5Wsmu8TRmPt21Q1P6.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/2Xqnn5Wsmu8TRmPt21Q1P6.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138adcfaf65d33519589c9ad6dc62b877f56f354d15b41dc2765ab2aed826912. 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/0oq2fLjTw7aqkVl48UrzQd.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/0oq2fLjTw7aqkVl48UrzQd.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503ef74d42e7640533c3b0745392917ab11e11745b74032db0d3df306ed06a30. 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/5yDu8UcSpm6UWZ7a89aAbo.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/5yDu8UcSpm6UWZ7a89aAbo.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2fa77031cdf5c038468b849a5cf96fe2e371b9ed91f84e614f214d53017522. 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/6ROrmdjawB8YJPuZSns86B.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/6ROrmdjawB8YJPuZSns86B.
{"copyright_id":"0xdd36db967ee9d7f2b6a9b87d65540c3b72150ce70ef03f02c23d95a756eacb72","isrc":"ARF411401092","name":"Good Feeling","registered_at":"2026-06-05T17:33:40Z","spotify_id":"1iytSqwSQpoIKg9ZqlrdX9","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd36db967ee9d7f2b6a9b87d65540c3b72150ce70ef03f02c23d95a756eacb72. 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/1iytSqwSQpoIKg9ZqlrdX9.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/1iytSqwSQpoIKg9ZqlrdX9.