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 0x50d304a8cd16dcc8e54c84ea0d8d53d5fdda1ab73d8b75bbdffa883e10624c9d. 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/b1f42f36-45e4-415d-873f-c1a4c47a91bb.json and https://artists.proofprofile.net/proofs/artist/b1f42f36-45e4-415d-873f-c1a4c47a91bb.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 0xa2e3b5ab06455048f2ca11722cd9dd4024fed3988ecc433652b1be32999e10da. 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/6T1FGOC96wa0vaZ6qIz8VK.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/6T1FGOC96wa0vaZ6qIz8VK.
Do You Like the Way (feat. Lauryn Hill & Cee-Lo)
{"copyright_id":"0x45de1f27d37bad97123797f530cf03381b83320783b5ffc4237d8fdf93e516ef","isrc":"USAR19900034","name":"Do You Like the Way (feat. Lauryn Hill & Cee-Lo)","registered_at":"2026-06-04T13:26:46Z","spotify_id":"6I0vPQwTPcgXCP6eR7v5gE","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45de1f27d37bad97123797f530cf03381b83320783b5ffc4237d8fdf93e516ef. 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/6I0vPQwTPcgXCP6eR7v5gE.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/6I0vPQwTPcgXCP6eR7v5gE.
The Harder They Fall (The Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b175c9cb09fff931c4605c9175f29275c918b5e3bb1a9f375d77c248d99d9a. 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/1Rqp7SOEpvw0MmZOhElumw.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/1Rqp7SOEpvw0MmZOhElumw.
If I Ruled the World (Imagine That) (feat. Lauryn Hill)
Hip Hop 100 Hits - Urban rap & R n B anthems inc. Jay Z, A$ap Rocky, Wu-Tang Clan & Nas
{"copyright_id":"0xeceddc90b517d5c00ff5a388d5ceb900e9f44795c748097ac00e1a10e00ee6c1","isrc":"USSM19601375","name":"If I Ruled the World (Imagine That) (feat. Lauryn Hill)","registered_at":"2026-06-01T06:53:25Z","spotify_id":"68EAYewaNNV0qCkJv3BSVm","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceddc90b517d5c00ff5a388d5ceb900e9f44795c748097ac00e1a10e00ee6c1. 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/68EAYewaNNV0qCkJv3BSVm.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/68EAYewaNNV0qCkJv3BSVm.
{"copyright_id":"0x5fdc938939c982aef60295f9aca7afee1c8c7db3972d3a67288b70abfb79097b","isrc":"USSM19802337","name":"Doo Wop (That Thing)","registered_at":"2026-06-04T11:20:03Z","spotify_id":"5FB6PyC4u2b6jNez7L1laB","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdc938939c982aef60295f9aca7afee1c8c7db3972d3a67288b70abfb79097b. 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/5FB6PyC4u2b6jNez7L1laB.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/5FB6PyC4u2b6jNez7L1laB.
{"copyright_id":"0x14766f19b1ca5f810cb622e96461c7eb15e8f509816db34c5391b0c0b7a69533","isrc":"USUM71916226","name":"Coming Home (feat. Ms. Lauryn Hill)","registered_at":"2026-06-04T13:35:45Z","spotify_id":"0TGyMhttuNwKab2XJMJ1rl","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14766f19b1ca5f810cb622e96461c7eb15e8f509816db34c5391b0c0b7a69533. 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/0TGyMhttuNwKab2XJMJ1rl.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/0TGyMhttuNwKab2XJMJ1rl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa888403d24c6e0f93924702f015a0d0484cdf51fe1f219010af59e71b7764bed. 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/40cayr7aVuRU8lXVn1PSpx.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/40cayr7aVuRU8lXVn1PSpx.
Save The Day (with Ms. Lauryn Hill) - 2020
{"copyright_id":"0xe05f81360e7d9f890246542fbfb0f9bda6f9f3d2ffcb7576aceb4456889becac","isrc":"USQX92003605","name":"Save The Day (with Ms. Lauryn Hill) - 2020","registered_at":"2026-06-05T10:39:17Z","spotify_id":"5aO54UchLksSDWRLYtvbqg","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05f81360e7d9f890246542fbfb0f9bda6f9f3d2ffcb7576aceb4456889becac. 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/5aO54UchLksSDWRLYtvbqg.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/5aO54UchLksSDWRLYtvbqg.
{"copyright_id":"0xa888403d24c6e0f93924702f015a0d0484cdf51fe1f219010af59e71b7764bed","isrc":"USUM72000387","name":"We Got Love (feat. Ms. Lauryn Hill )","registered_at":"2026-06-05T07:53:37Z","spotify_id":"1i92FePfxg1FGAuC6fOpvz","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa888403d24c6e0f93924702f015a0d0484cdf51fe1f219010af59e71b7764bed. 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/1i92FePfxg1FGAuC6fOpvz.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/1i92FePfxg1FGAuC6fOpvz.
{"copyright_id":"0x45de1f27d37bad97123797f530cf03381b83320783b5ffc4237d8fdf93e516ef","isrc":"USAR19900034","name":"Do You Like the Way (feat. Lauryn Hill & Cee-Lo)","registered_at":"2026-06-04T13:26:46Z","spotify_id":"7dP57u5hv9TqZnfTlklyrt","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45de1f27d37bad97123797f530cf03381b83320783b5ffc4237d8fdf93e516ef. 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/7dP57u5hv9TqZnfTlklyrt.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/7dP57u5hv9TqZnfTlklyrt.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e55cc431abb1623ea6e268b17b038a45279544574949093b043b963461b3a5. 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/1W7gmQ7AgRMIUthrV0OD0h.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/1W7gmQ7AgRMIUthrV0OD0h.
{"copyright_id":"0xeceddc90b517d5c00ff5a388d5ceb900e9f44795c748097ac00e1a10e00ee6c1","isrc":"USSM19601375","name":"If I Ruled the World (Imagine That) (feat. Lauryn Hill)","registered_at":"2026-06-01T06:53:25Z","spotify_id":"0mfnMZ0cHh1YFLyqjBj6ld","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceddc90b517d5c00ff5a388d5ceb900e9f44795c748097ac00e1a10e00ee6c1. 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/0mfnMZ0cHh1YFLyqjBj6ld.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/0mfnMZ0cHh1YFLyqjBj6ld.
{"copyright_id":"0xeceddc90b517d5c00ff5a388d5ceb900e9f44795c748097ac00e1a10e00ee6c1","isrc":"USSM19601375","name":"If I Ruled the World (Imagine That) (feat. Lauryn Hill)","registered_at":"2026-06-01T06:53:26Z","spotify_id":"5PQmSHzWnlgG4EBuIqjac2","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceddc90b517d5c00ff5a388d5ceb900e9f44795c748097ac00e1a10e00ee6c1. 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/5PQmSHzWnlgG4EBuIqjac2.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/5PQmSHzWnlgG4EBuIqjac2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f74cfa17558996df4857424f01511b758b500bfd26d21508e43ed92450c747. 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/36aOJqvtwWMey2Esokbzq4.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/36aOJqvtwWMey2Esokbzq4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f74cfa17558996df4857424f01511b758b500bfd26d21508e43ed92450c747. 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/7MfT3vxWlHT4VgwxuUUbLu.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/7MfT3vxWlHT4VgwxuUUbLu.
{"copyright_id":"0x0bda263614cd211ea9704c8795db6e8b145c576a58fe5977abe0f4dbc0181bba","isrc":"USIR29905024","name":"Turn Your Lights Down Low","registered_at":"2026-06-01T12:41:26Z","spotify_id":"7IekFttZwgopH8VwDT0R0R","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bda263614cd211ea9704c8795db6e8b145c576a58fe5977abe0f4dbc0181bba. 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/7IekFttZwgopH8VwDT0R0R.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/7IekFttZwgopH8VwDT0R0R.