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 0xf5adae6b3f1b457574d7a705217deb2670825a0fae6f1fa10214ef7f8edb5a96. 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/1a70a84d-75ca-4656-b639-e553925d157f.json and https://artists.proofprofile.net/proofs/artist/1a70a84d-75ca-4656-b639-e553925d157f.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 0x0254b75590d10fb154b132befa816c7a783cba84b338479678bc5c8b721e2033. 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/07Cf9hPzc1Wjxr8W26SGl9.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/07Cf9hPzc1Wjxr8W26SGl9.
{"copyright_id":"0xebbf4c0e66d4e6afd61e11eb03c4b5fcca3e8cfc39805b1568d8cd597f00e4ee","isrc":"QM4TW2351017","name":"Zaza (Chimbita)","registered_at":"2026-06-10T20:47:00Z","spotify_id":"5oVdxjNUUjf9Q06LnPYYay","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbf4c0e66d4e6afd61e11eb03c4b5fcca3e8cfc39805b1568d8cd597f00e4ee. 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/5oVdxjNUUjf9Q06LnPYYay.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/5oVdxjNUUjf9Q06LnPYYay.
{"copyright_id":"0x4f3e077cd5d6c3e1597d1b9d256ae14e3c1a899de9e6dc5acce457d1080985bd","isrc":"COA6W2000967","name":"Viernes Social","registered_at":"2026-06-07T02:53:31Z","spotify_id":"1hsP0RKI7VDOsO4xrJ9BaK","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3e077cd5d6c3e1597d1b9d256ae14e3c1a899de9e6dc5acce457d1080985bd. 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/1hsP0RKI7VDOsO4xrJ9BaK.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/1hsP0RKI7VDOsO4xrJ9BaK.
{"copyright_id":"0x018fbded1c7493bbb09f981289b9503538be52d045770d09dd05c9b41a54bb4b","isrc":"US3Z41501450","name":"Bailame Despacio","registered_at":"2026-06-04T03:49:15Z","spotify_id":"4OaTpLJIa2harufGxfOPUu","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018fbded1c7493bbb09f981289b9503538be52d045770d09dd05c9b41a54bb4b. 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/4OaTpLJIa2harufGxfOPUu.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/4OaTpLJIa2harufGxfOPUu.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d758408ed0fe916af434d0ecc42b346369659a859a0cb20d61259893672edba. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5utrRGl3m8Us1S5A3s2YC8.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/5utrRGl3m8Us1S5A3s2YC8.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e16c193b18c69e445ca8c3058ef3c125ea950f216a7837762e1e3bbe8b46a34. 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/1uyMdCN3bj4wDTicr0eK1q.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/1uyMdCN3bj4wDTicr0eK1q.
{"copyright_id":"0xe0ad97cf6dde17e426cc1327ed76435a67d21aae7933b719ce36f8f234aabc0e","isrc":"US3Z42400104","name":"C Le Da - Merengue","registered_at":"2026-06-21T08:45:48Z","spotify_id":"6Sl0DR9e4nCmxHCp3XdaNJ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ad97cf6dde17e426cc1327ed76435a67d21aae7933b719ce36f8f234aabc0e. 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/6Sl0DR9e4nCmxHCp3XdaNJ.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/6Sl0DR9e4nCmxHCp3XdaNJ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf88c9fb37115e2c73fb6ef9f5c5e5dbf7ff1e35c2aa3f73e1db1c0ab7eea0e2. 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/6ZFnse2LtjvVbp1lxBdIx9.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/6ZFnse2LtjvVbp1lxBdIx9.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8a7d9d21040cf42a2e802f53cfe94fccc8168dd136009b22151799f539eab3. 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/1N100ZbFAWwo6ZfaHx6mnn.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/1N100ZbFAWwo6ZfaHx6mnn.
{"copyright_id":"0xfe7aef5cbbfebfb3cf18e1f8058a93ea7b80fe32682e2914ea6ea4883424a9e0","isrc":"US3Z41900182","name":"Mar y Lili (Enrola)","registered_at":"2026-06-24T15:31:43Z","spotify_id":"6qOKiQKhZ9Iprwy8BGOleV","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7aef5cbbfebfb3cf18e1f8058a93ea7b80fe32682e2914ea6ea4883424a9e0. 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/6qOKiQKhZ9Iprwy8BGOleV.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/6qOKiQKhZ9Iprwy8BGOleV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7c51b7c5c06f35cea5a6b1dc31eede7c9ac6a92a034240f745b74a047af097. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5DUuviuOfupSYhpnLTMkTI.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/5DUuviuOfupSYhpnLTMkTI.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7c51b7c5c06f35cea5a6b1dc31eede7c9ac6a92a034240f745b74a047af097. 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/6KVpCYgAYeaujfJtw5Wpjj.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/6KVpCYgAYeaujfJtw5Wpjj.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e704b3a63c803f1b8121bef13c2f6b00931d3ead73d8675d98b2c8c55e61e16. 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/1vJxPaXsZUXqSIBVFgtebF.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/1vJxPaXsZUXqSIBVFgtebF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f0f9c35dfe4917aedfd570f7f8156eb26be57711af28bcc96c134e40a6034a. 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/5RzyuU8xbape0taVZ7NvEN.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/5RzyuU8xbape0taVZ7NvEN.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f0209a9105ccdbbb3b9fe0b1371ef443c9a6b6bafb6f0294e743589cd7e80d. 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/626oKECly9hSkRlT1UdxGk.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/626oKECly9hSkRlT1UdxGk.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d758408ed0fe916af434d0ecc42b346369659a859a0cb20d61259893672edba. 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/5tQDK4Dx1E57uAy4bLdW6a.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/5tQDK4Dx1E57uAy4bLdW6a.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5342393b390a992e079c04b9ac57102c971f33e4ea4700ae6e80bb52c1059c27. 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/3Cldh1P3O0ksmFSJcjzO5K.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/3Cldh1P3O0ksmFSJcjzO5K.
Versos de Neruda (feat. Xantos, Fonseca)
{"copyright_id":"0xf25bd3ba4defa4baf44cf6f4fea9edd0a14ce0d1627fa74fc3fba5bcd9263f6a","isrc":"MXF151800124","name":"Versos de Neruda (feat. Xantos, Fonseca)","registered_at":"2026-06-04T12:28:49Z","spotify_id":"6t0pCukYcCbSmGBX2qeIHB","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25bd3ba4defa4baf44cf6f4fea9edd0a14ce0d1627fa74fc3fba5bcd9263f6a. 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/6t0pCukYcCbSmGBX2qeIHB.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/6t0pCukYcCbSmGBX2qeIHB.