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 0xee1d3eee0c0855f097c19cde23011d1417bce51376a39009ac63f21d394c9ec1. 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/796687ca-bfd8-4d6e-a3c4-6d50e239a483.json and https://artists.proofprofile.net/proofs/artist/796687ca-bfd8-4d6e-a3c4-6d50e239a483.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 0x2e9a891410a5787fa41817a81d2547cf8853af456fdc82e0d3513ae9d0b5c2da. 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/4wCCSBiXP2iYnXzfgMxhn2.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/4wCCSBiXP2iYnXzfgMxhn2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7996aaea010bb87992e2f7832c2a662f673558d5f15e1302cc4f35715be4f2aa. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/76bauuXo9GSkdrIAA3jZx6.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/76bauuXo9GSkdrIAA3jZx6.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea22fa778c23396848280edb6cf92be06b16a564ac5588fc5c93e3161a43dd8f. 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/4Ree0RSaQJHxnrkBAnsfXk.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/4Ree0RSaQJHxnrkBAnsfXk.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b47b6af50193374150fe99856ffeaa38f1819e5f5ab230c7d12ccf855feabcc. 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/3323a3oIR7eqlLAYgV6dM3.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/3323a3oIR7eqlLAYgV6dM3.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffa11d0f4f4d50cff169648418b10b0940c648e01199f91de259d74ed8af334. 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/4SsqNACutDVq1y2boCaXkz.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/4SsqNACutDVq1y2boCaXkz.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7996aaea010bb87992e2f7832c2a662f673558d5f15e1302cc4f35715be4f2aa. 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/6Vh7BT2SehZbItXijnETnx.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/6Vh7BT2SehZbItXijnETnx.
{"copyright_id":"0x705ee0ec0bab10e39971030cad302333bebbbfeb56ec47d82f4a067053e0902e","isrc":"BX2M52100005","name":"Rosa Dourada","registered_at":"2026-06-27T15:51:38Z","spotify_id":"3PD2icShHAyDAw8DVTwoHZ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705ee0ec0bab10e39971030cad302333bebbbfeb56ec47d82f4a067053e0902e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3PD2icShHAyDAw8DVTwoHZ.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/3PD2icShHAyDAw8DVTwoHZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695b46b48bca5ca8364eb39af500c93c4d6dbf324f93e0e7f563935354ff4067. 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/0upFJQ1NNo75l0ihFip5EU.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/0upFJQ1NNo75l0ihFip5EU.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9809a40df3daf28286ce05d2efdc4d00b83e30ff460eefe301dd6bb0dc3278. 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/4DGAE0CKNJsUV1yGODAFdh.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/4DGAE0CKNJsUV1yGODAFdh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe884864fb6eb684ba717b672f1c2aaf7327dfb5439cf099b900c295ef9f26fb4. 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/51FFY8aXKnPoQdHR8CwOj7.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/51FFY8aXKnPoQdHR8CwOj7.
{"copyright_id":"0x53070ba0f729a97a59b55be78d0b271d47c35a93e955a24ea5ce6e14f16fa0b8","isrc":"BX2M52300003","name":"Voar da Liberdade","registered_at":"2026-06-07T03:57:28Z","spotify_id":"2DDKgxC3WwYBFECgh6snFj","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53070ba0f729a97a59b55be78d0b271d47c35a93e955a24ea5ce6e14f16fa0b8. 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/2DDKgxC3WwYBFECgh6snFj.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/2DDKgxC3WwYBFECgh6snFj.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b7b7e5bb35d2d6ca360455ea41a7922579eae9daab7f8434874e276221c370. 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/5aOiA6gp0cLJpcaRJzwlfl.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/5aOiA6gp0cLJpcaRJzwlfl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb957e0275ce1d466b678aa9b4c525c086296351272451c2144b5a0c2f8d3fbd. 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/3Q8fJE9OBhxfKrXZq9CKJG.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/3Q8fJE9OBhxfKrXZq9CKJG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6227af0d4174fc096782850043fd39b9aba009b907428b57742f65ae2340a2f6. 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/3ongZ9v4ZIPvq93HceYTfh.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/3ongZ9v4ZIPvq93HceYTfh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f0f8c20652afeb31412a6f6f1e505e3330839957a12fe2b38dda123de2efcc. 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/0j5x0dtor9AAlvwNh0PIoP.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/0j5x0dtor9AAlvwNh0PIoP.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb837f0133778f4eece19f7f76288e1361510541fe21cb6e1e6c9a6903ca7ba. 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/4rs14LfPZDZHJ73msQDnNz.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/4rs14LfPZDZHJ73msQDnNz.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e32c8e14d6b8f2be848913bdb6d80ddde720138ca6f23f790de3f18d4230037. 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/6bQ5lCDSzobkalGO8FtXjE.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/6bQ5lCDSzobkalGO8FtXjE.