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 0x8a8eda0196c2e962e289ca6ee489efbf32b98f98c84ef6f906d03f3516dd9710. 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/d78fe4d1-444a-4751-9776-14a8d4554c50.json and https://artists.proofprofile.net/proofs/artist/d78fe4d1-444a-4751-9776-14a8d4554c50.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 0x78353c2e10a522e1050bb51921c63c3808c6e0fb2f52c986a672f3d2d8cd1dc2. 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/0QIlgmnJBsd6zkH9u7MEcX.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/0QIlgmnJBsd6zkH9u7MEcX.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1332a131bc3d9a8d1d6169d9a107d56821475419a396bdece659c968b033a0d. 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/14kO9fxCfz4K5PXSMiOxJe.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/14kO9fxCfz4K5PXSMiOxJe.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cc36a6c5851aafe8337ecf590ca4e0148232f3bde19e60741644b61f363c47. 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/5oZm0cMtex4ENho0IRaJ5N.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/5oZm0cMtex4ENho0IRaJ5N.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1aabb0eacedc97c6ecec90d39171b86f07061a6483b85209065286697e2dd6. 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/14IE83oJcnAkmhOh72Yc9r.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/14IE83oJcnAkmhOh72Yc9r.
{"copyright_id":"0xc95b56a133ea7e5aca541092ac28e34a7b7c46fe4c5d51df56173f03de945b83","isrc":"USANG2472554","name":"Date Idea","registered_at":"2026-06-04T14:40:40Z","spotify_id":"0tvhwI8myExA6XkgIKyTSF","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95b56a133ea7e5aca541092ac28e34a7b7c46fe4c5d51df56173f03de945b83. 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/0tvhwI8myExA6XkgIKyTSF.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/0tvhwI8myExA6XkgIKyTSF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813f12868733d0a811041f0baa185e01b3785602c5ebd887eadbb225c98aff9c. 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/21tSMkNSejnQHHvusCb7KI.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/21tSMkNSejnQHHvusCb7KI.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11526d953301a2d3e71f03ef99e79374a1dc08af7a9eae3f83b28ebb6bd2770. 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/4jGI97ZdV6k48Z6RucT3Qs.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/4jGI97ZdV6k48Z6RucT3Qs.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4739a7d44a9c7d8e6d9db8fbcfe2c3a5ade02209fd48043db00356e92c660af9. 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/5MGq81Nt6R6WG1bhyAUahb.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/5MGq81Nt6R6WG1bhyAUahb.
{"copyright_id":"0xe31c2fefa594910dee99db03daaca19a68f02e2e104d6a8ac80405044c032d7f","isrc":"GBLV62025238","name":"Keep Friends Close","registered_at":"2026-06-07T11:46:38Z","spotify_id":"50hLntzwCRRts27GvMFYXS","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31c2fefa594910dee99db03daaca19a68f02e2e104d6a8ac80405044c032d7f. 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/50hLntzwCRRts27GvMFYXS.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/50hLntzwCRRts27GvMFYXS.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636532581816bb5ce78c857d2bc17b4a9c43fafe6a759001b42e4186d9b425c4. 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/4x3wCA5XZMlxoeTsQgkc3D.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/4x3wCA5XZMlxoeTsQgkc3D.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1aabb0eacedc97c6ecec90d39171b86f07061a6483b85209065286697e2dd6. 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/2IphLZJaUn0zoiAw5i6yBb.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/2IphLZJaUn0zoiAw5i6yBb.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63060e8710ccc8fbf4bfa1638346c16c610d23613c6aeec7245ab57feeda438a. 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/2NV3B6jw3s6zjCa1s53mR4.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/2NV3B6jw3s6zjCa1s53mR4.