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 0x4e65a3d764b066b5d1a98330b1c60185b29e98e279a557fb375c514927eeabe1. 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/547b2786-8add-4e67-8652-c344d2ac50fd.json and https://artists.proofprofile.net/proofs/artist/547b2786-8add-4e67-8652-c344d2ac50fd.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 0x7b2b09a5755f87d4222240537061c99d704814c1f180347ab4be00f19f27b48f. 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/45yEQI8UInqjLvfI0q7XhE.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/45yEQI8UInqjLvfI0q7XhE.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea78c795c3d6241f54d12e657c9189e9c5b2120eb43aacd68a68f7af15c9217. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6moxdoqCp0GE4vkdj66Uo6.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/6moxdoqCp0GE4vkdj66Uo6.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b53366b7322964236614a1833611c03ab7765bccf6d255db73b4fc9fc827ca. 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/18B3AG7KK2hSjL0UY6EjUB.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/18B3AG7KK2hSjL0UY6EjUB.
{"copyright_id":"0x9b54d9ee941db4db83ab5ba3ae861db1ba24b849f40e89075e0a25b8a3d5ca8b","isrc":"NLG661900395","name":"Give Dem","registered_at":"2026-06-04T10:01:53Z","spotify_id":"6DcVKNP56WQgkvYVp8Z5kg","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b54d9ee941db4db83ab5ba3ae861db1ba24b849f40e89075e0a25b8a3d5ca8b. 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/6DcVKNP56WQgkvYVp8Z5kg.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/6DcVKNP56WQgkvYVp8Z5kg.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3638249b6ed3129151400be3ed80a919a372bbdac718c407d967f229f84ef6. 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/7eCxBJf5yF68WOcQuy9pY1.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/7eCxBJf5yF68WOcQuy9pY1.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26831126bfea2fa20da47ec532c5c17c1f0c4d05e2e3851f2012824fafc810d. 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/586q653qWKRkvEe1K1iWbg.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/586q653qWKRkvEe1K1iWbg.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ad5d80af1957fa64383f1301c560c417901721aee981740d317caf63964909. 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/7L4a4WZ41X8ZFymwMqnRZo.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/7L4a4WZ41X8ZFymwMqnRZo.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0088783a01a5d127de2397e21c8c0d6192b9e3be24f77312b763037092f5cbb. 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/5xgo5sVonlCz7M2CTZgqZA.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/5xgo5sVonlCz7M2CTZgqZA.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153785dfdf4f82aaa523aaf0b4f9713295444819a295c5d699cfb6c2b147469b. 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/7aHjouatVlfS8InAEhRtSu.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/7aHjouatVlfS8InAEhRtSu.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b53366b7322964236614a1833611c03ab7765bccf6d255db73b4fc9fc827ca. 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/4u1F7FuNNI9cqY21ocIdcn.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/4u1F7FuNNI9cqY21ocIdcn.
No Borders: European Compilation Project
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a36de15481d1202886fe7372b19c9de937d4bb80df445a2dc129e084432421. 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/6qUpmpflJ60Hav6vPNDhsP.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/6qUpmpflJ60Hav6vPNDhsP.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a36de15481d1202886fe7372b19c9de937d4bb80df445a2dc129e084432421. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T20:34:30Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4KvrnGfrg72Go0d2N5X51v.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/4KvrnGfrg72Go0d2N5X51v.