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 0x3c26992dcc446322f9dbbcc7957769eb4be1bb480ab90bed120268292f27d632. 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/7a68e340-d077-4c1b-bad9-aba1476d189f.json and https://artists.proofprofile.net/proofs/artist/7a68e340-d077-4c1b-bad9-aba1476d189f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xb779559c0ed335d15a1f41abb8fc25537732450ac4e836289d1c046ccf57ee37","isrc":"GBCML2025008","name":"Elegy (In Memoriam Stephen Lawrence)","registered_at":"2026-06-07T18:32:30Z","spotify_id":"2NPERMJL4FtHLyM47ORbjx","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 0xb779559c0ed335d15a1f41abb8fc25537732450ac4e836289d1c046ccf57ee37. 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/2NPERMJL4FtHLyM47ORbjx.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/2NPERMJL4FtHLyM47ORbjx.
The New Four Seasons - Vivaldi Recomposed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f1c6324366e13541cc48a82b745891036b2cd7850968469aa7fd0ae0ef69c6. 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/3tRW47HHCob59kMVVpYF3m.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/3tRW47HHCob59kMVVpYF3m.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc835ed7f0fd68583e55dd4c837de63546857edb13d8c0137da6886b1e61a18b. 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/37bI12CYrLLYIeI8NtBp1k.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/37bI12CYrLLYIeI8NtBp1k.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9b3d73ba1ad9cc17a25106b1f56ff1e2e3887b13fdc484a8e42e59d02abb2e. 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/751ia3kYrAXlIe11Xrs10A.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/751ia3kYrAXlIe11Xrs10A.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d510f7717c3a2501f1498fa95140e32c0d6475f9606bc9d19db13af14ad154. 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/3ebpIjpsSZhIJQNYV2pkKG.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/3ebpIjpsSZhIJQNYV2pkKG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d12583fa9c690178140cc029431c5865acc3fef94e7c653cc034aa0fef3a665. 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/0N2CdaCWktKFbuVJ9Cmwxb.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/0N2CdaCWktKFbuVJ9Cmwxb.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7df2e9d9cc8b3d55308ca5ea9b1f9cfd72cdee96466aff697786d98dadaf95a. 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/6XBvMG5PihGZf0I604N6PK.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/6XBvMG5PihGZf0I604N6PK.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9972afec2f7b9592b897ed20bc589858d5c344a65a74992a57647c2024429fb9. 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/49C2DoPRXGGyjcE1hC3iOB.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/49C2DoPRXGGyjcE1hC3iOB.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b88e9be4461e5008dce630315882b9f49f5a15bfa80205e16473189adc28ea. 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/4CZXinINzPNUR5d5O1wbtp.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/4CZXinINzPNUR5d5O1wbtp.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cddd101e9c225aab238978228491db83a8876e94de78d9e74815839e3a3fef9. 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/1zokTGbBIxu4LCeQG3F9tc.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/1zokTGbBIxu4LCeQG3F9tc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05c3aa0bd9f81611a1b5ecddbf363b3ce88be6460292cba51fcf9944e0aac9f. 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/7wPPWL2wqsif8tsPG2WvlM.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/7wPPWL2wqsif8tsPG2WvlM.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d71703ef01922c18d7f35522a9a30ef842aad5dbcc7dd921cc7345c8384301d. 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/67jK5T6X9N5NFpfh23YWw0.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/67jK5T6X9N5NFpfh23YWw0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a0cd5b241514d7ef1473f451dffe4928c62034f8edc81d929dd95f80d782b4. 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/4Ojc9MyHIys2PgdWzkdKrF.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/4Ojc9MyHIys2PgdWzkdKrF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e0d9ebc69426dd50f0297ef0e78de3eed092c8485e605b333995ad5f66f990. 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/0dP8WfivmanmENjKXEsIfT.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/0dP8WfivmanmENjKXEsIfT.
Othello, Op. 79: II. Children's Intermezzo
Sussex Landscape, Op. 27: II. Lento e molto tranquillo