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 0x0a4c754084f29fdab02fa812675ddb35d758e6dff7f3c6c8e698d34985a28cae. 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/1abe3aba-a483-4a5f-abd7-e52899794a72.json and https://artists.proofprofile.net/proofs/artist/1abe3aba-a483-4a5f-abd7-e52899794a72.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xc54a9349f120419ce0c81cd141f01bc7edf5251832592efb415b6dea1a397c9f","isrc":"QZAKB2201662","name":"stranded (feat. angelus)","registered_at":"2026-06-22T13:18:39Z","spotify_id":"1FQOCAk4X7SsbEKRZ7TJsG","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 0xc54a9349f120419ce0c81cd141f01bc7edf5251832592efb415b6dea1a397c9f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1FQOCAk4X7SsbEKRZ7TJsG.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/1FQOCAk4X7SsbEKRZ7TJsG.
{"copyright_id":"0xc54a9349f120419ce0c81cd141f01bc7edf5251832592efb415b6dea1a397c9f","isrc":"QZAKB2201662","name":"stranded (feat. angelus)","registered_at":"2026-06-22T13:18:39Z","spotify_id":"4ybA4RmMlEjU83umFZnTVj","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54a9349f120419ce0c81cd141f01bc7edf5251832592efb415b6dea1a397c9f. 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/4ybA4RmMlEjU83umFZnTVj.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/4ybA4RmMlEjU83umFZnTVj.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088e9320b9f4db06aaaa1ddfa333482b0cf79fa2a4405caafe0535388480795c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0wA0I2CMFPL5joikwhKdUA.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/0wA0I2CMFPL5joikwhKdUA.
{"copyright_id":"0x7aa1070c93baeb5b05d66b65877f43de23b6073bdf9b7b3660328fd74ee085a4","isrc":"QZAKB2306753","name":"hate me","registered_at":"2026-06-24T23:25:21Z","spotify_id":"2enwgKXYQCqNLjmMHPuCsH","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa1070c93baeb5b05d66b65877f43de23b6073bdf9b7b3660328fd74ee085a4. 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/2enwgKXYQCqNLjmMHPuCsH.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/2enwgKXYQCqNLjmMHPuCsH.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad55a92223755dbee3e36900a4a39196f2e76da0b3089e1dec945cbd3d3df21. 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/2XQFj0w1UIJpsUs0OO4013.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/2XQFj0w1UIJpsUs0OO4013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088e9320b9f4db06aaaa1ddfa333482b0cf79fa2a4405caafe0535388480795c. 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/0S86k4AVVcmFqXglEgReVk.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/0S86k4AVVcmFqXglEgReVk.
{"copyright_id":"0xc54a9349f120419ce0c81cd141f01bc7edf5251832592efb415b6dea1a397c9f","isrc":"QZAKB2201662","name":"stranded (feat. angelus) - bonus","registered_at":"2026-06-22T13:18:39Z","spotify_id":"1MhPGWzhVU12iIfQV3n547","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54a9349f120419ce0c81cd141f01bc7edf5251832592efb415b6dea1a397c9f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1MhPGWzhVU12iIfQV3n547.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/1MhPGWzhVU12iIfQV3n547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb99c5381013d1244743fa8e5f201b003faffe94c1cb72bb1286a1bb10186542. 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/7cf3o0yzUsA10Azn0DEuqt.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/7cf3o0yzUsA10Azn0DEuqt.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9322d6d90ec1cf2db1298913821a56d6cb05d5988357ac0cc6305de73a53c2. 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/08As7ah3hrOGxvAaTJMATJ.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/08As7ah3hrOGxvAaTJMATJ.
{"copyright_id":"0xa1812f62fc6a4f4478795e2f8e33faddcdc8e7fbdc97a5594729275c13c34caf","isrc":"QZTB92210528","name":"wrong time, wrong place","registered_at":"2026-06-24T13:52:24Z","spotify_id":"3ySHvS56r8PEYjVnArwRmu","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1812f62fc6a4f4478795e2f8e33faddcdc8e7fbdc97a5594729275c13c34caf. 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/3ySHvS56r8PEYjVnArwRmu.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/3ySHvS56r8PEYjVnArwRmu.