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 0xd6f69f1557ea75201f8e91b21eeb251ce45a9a4a91c1b83e0035681bf68c1121. 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/c1f5f527-51f1-4919-a8fb-0cd18c2d95ab.json and https://artists.proofprofile.net/proofs/artist/c1f5f527-51f1-4919-a8fb-0cd18c2d95ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x7ae4e3fb5ac6535ea0f3cb675a3704d0834adcb6091f74bfa2458812f63c3ed7","isrc":"USRHR1123413","name":"Last Goodbye","registered_at":"2026-06-28T20:42:06Z","spotify_id":"5VbKEzJp2nr99ihuPsEW2M","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 0x7ae4e3fb5ac6535ea0f3cb675a3704d0834adcb6091f74bfa2458812f63c3ed7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5VbKEzJp2nr99ihuPsEW2M.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/5VbKEzJp2nr99ihuPsEW2M.
These Times We're Living In - A Red House Artist Anthology
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ac14da5c59ae7d481f5424780ae7a1ec11d748206131650a96c2284051b0b5. 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/35oJ1S7u6GtHCixr4z11ix.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/35oJ1S7u6GtHCixr4z11ix.
{"copyright_id":"0xab02fb6ed388ea299fd5504a1451aeeea6f6693caf26a42a9c124b8e3df32b1c","isrc":"CAF420600206","name":"Barefoot Floors","registered_at":"2026-06-10T08:15:45Z","spotify_id":"68EdFW60AwheykmIyj6PLo","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab02fb6ed388ea299fd5504a1451aeeea6f6693caf26a42a9c124b8e3df32b1c. 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/68EdFW60AwheykmIyj6PLo.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/68EdFW60AwheykmIyj6PLo.
{"copyright_id":"0x5d0ca9d353ee4ab9e6d655be20fe5948b32ef6d53622eddc64a7a9c99ee929b1","isrc":"CAF420600212","name":"Trick Rider","registered_at":"2026-06-07T22:31:11Z","spotify_id":"1506oCdCmc1eSlkrRYqSDF","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0ca9d353ee4ab9e6d655be20fe5948b32ef6d53622eddc64a7a9c99ee929b1. 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/1506oCdCmc1eSlkrRYqSDF.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/1506oCdCmc1eSlkrRYqSDF.
{"copyright_id":"0xd9b58bff7efa0e696252644aba60f2720167996a7f740d064144eb197bbec83c","isrc":"CAF420600216","name":"Nothing But a Child","registered_at":"2026-06-10T08:07:19Z","spotify_id":"5olE2LShiEzlyrw6gKnZhy","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b58bff7efa0e696252644aba60f2720167996a7f740d064144eb197bbec83c. 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/5olE2LShiEzlyrw6gKnZhy.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/5olE2LShiEzlyrw6gKnZhy.
Long Time Traveller - Swing Low Sail High