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 0x5ac21abf7a1cd693f091bc2607afa9a4fa7134b2a4e6e57079d7b60a0541cd6a. 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/28a531cf-c4a7-4466-9e47-d413c675077e.json and https://artists.proofprofile.net/proofs/artist/28a531cf-c4a7-4466-9e47-d413c675077e.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 0xe8c1b6b1e9fd02fac9a2c2ded4fc1b3bd0494c52450d68eb7dd6600e9020846a. 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/2FRFDTFDdbSFQdRCtcNgp5.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/2FRFDTFDdbSFQdRCtcNgp5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f78af2875f6ba6b6c630adcb612e21de41a01002629150368759d88b3a5c2c. 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/567moJLhTSiIivWwdUKIZa.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/567moJLhTSiIivWwdUKIZa.
{"copyright_id":"0xcf437df8c1dfb34ed4853690103a739bb4cbbe6440a73fc16174ed925fa33df7","isrc":"IL1010001834","name":"היום יום שישי - שבת","registered_at":"2026-06-17T20:14:50Z","spotify_id":"3K34lrTPhf8tWEwleVIEjB","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf437df8c1dfb34ed4853690103a739bb4cbbe6440a73fc16174ed925fa33df7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3K34lrTPhf8tWEwleVIEjB.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/3K34lrTPhf8tWEwleVIEjB.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f78af2875f6ba6b6c630adcb612e21de41a01002629150368759d88b3a5c2c. 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/2TQbOK6ewEGYVkVeNWjIpm.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/2TQbOK6ewEGYVkVeNWjIpm.
{"copyright_id":"0x7cb51633fa00ddb80ddd61133da422bcbb624ce2af1d9285cca345eab21c88de","isrc":"IL1001088661","name":"ערב עירוני","registered_at":"2026-06-18T05:52:49Z","spotify_id":"6teGY6UkeQUTnxQQEfuXha","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb51633fa00ddb80ddd61133da422bcbb624ce2af1d9285cca345eab21c88de. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6teGY6UkeQUTnxQQEfuXha.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/6teGY6UkeQUTnxQQEfuXha.
העיקר זה הרומנטיקה - מתוך ערב שירים של יוני רכטר
{"copyright_id":"0x7cb51633fa00ddb80ddd61133da422bcbb624ce2af1d9285cca345eab21c88de","isrc":"IL1001088661","name":"ערב עירוני","registered_at":"2026-06-18T05:52:49Z","spotify_id":"7AqVAUw3NScz3cCh4Om9cF","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb51633fa00ddb80ddd61133da422bcbb624ce2af1d9285cca345eab21c88de. 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/7AqVAUw3NScz3cCh4Om9cF.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/7AqVAUw3NScz3cCh4Om9cF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3502d70b8152292f50a4ae5d1916333332548ce72d06dd2115e1ba29a6d4141f. 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/0KS2oUw3nsXBUcLcR9Sacb.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/0KS2oUw3nsXBUcLcR9Sacb.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cf40db91a152637867ab173a09542f4cd72c5a6b1d2353e1f708934c561e6d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4j9CmtaBpLFg8q8Grzl3Nk.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/4j9CmtaBpLFg8q8Grzl3Nk.