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 0x3edb1a62594e89a1e7ae43b75c1d8ffe786198bffbaa7b7e2f50c9cdb0825db9. 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/aa3feffb-1523-4398-9436-bfe57d783e00.json and https://artists.proofprofile.net/proofs/artist/aa3feffb-1523-4398-9436-bfe57d783e00.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 0xcfe1d1790aa252f56897fba6b29bcf697d54da07dbb65999311ff2be64c24b49. 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/5lJB9KcIUVbDFNznw4fEts.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/5lJB9KcIUVbDFNznw4fEts.
{"copyright_id":"0xc1bb00ac0ecafa43c1005f0fdb3d9d8e8ea74e485ea6c495c6ddce557efcb004","isrc":"ES71G2243907","name":"Behe Klasekoa","registered_at":"2026-06-05T09:54:18Z","spotify_id":"3BKcC9sTmgqutBngcXIB1r","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bb00ac0ecafa43c1005f0fdb3d9d8e8ea74e485ea6c495c6ddce557efcb004. 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/3BKcC9sTmgqutBngcXIB1r.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/3BKcC9sTmgqutBngcXIB1r.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cd3f0d5edaf082f7a2bb85d694f38237fb79dbc2b546f4f915f8646268b9c6. 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/5ilIuIsyYtGgs0mtEOYaOF.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/5ilIuIsyYtGgs0mtEOYaOF.
{"copyright_id":"0x0d62a8e8db7efd3496120fd21a3aff406a1d98122e5adc48b24defe3cb71cef3","isrc":"ES71G2243909","name":"Zerua Gorriz","registered_at":"2026-06-07T09:28:08Z","spotify_id":"5khTbAYUPlacsLNvoCH5Oj","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d62a8e8db7efd3496120fd21a3aff406a1d98122e5adc48b24defe3cb71cef3. 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/5khTbAYUPlacsLNvoCH5Oj.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/5khTbAYUPlacsLNvoCH5Oj.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98484f09cfb2a35bfec2cad1101752d8a877ef305dfe6e2bea85b6a3904f420. 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/4lqh07nrTugixgPUnDl1rp.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/4lqh07nrTugixgPUnDl1rp.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d68b877cec4e177027ebedbcc0cb706bda73dfafb79a8f3fea7829e4d2f0fd. 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/6R29Jn9518cM7bZTsgorzf.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/6R29Jn9518cM7bZTsgorzf.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd935f8927bce7d1c549eb423c058141dbe559199eddc71a5f3c425c64fc61fbe. 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/2dd8fv4nONZBxSYwDVgn0s.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/2dd8fv4nONZBxSYwDVgn0s.
{"copyright_id":"0xa69cafc7af828604ab25918c6d8f8306e6986c834ed94b30947fff9ec64ed1d0","isrc":"ES71G2243913","name":"Xagua eta Katua Vol. II","registered_at":"2026-06-20T12:34:42Z","spotify_id":"6nHscrxkP6cGFMTWy4EUnQ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69cafc7af828604ab25918c6d8f8306e6986c834ed94b30947fff9ec64ed1d0. 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/6nHscrxkP6cGFMTWy4EUnQ.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/6nHscrxkP6cGFMTWy4EUnQ.
{"copyright_id":"0xa3ad0e3979e7ae77a4668bd67221d22d82503fc383bd56bf36d3aadc4f0a5146","isrc":"ES71G2243915","name":"Berak Badaki","registered_at":"2026-06-05T07:18:52Z","spotify_id":"7skZAxPzdamID8LePCquan","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ad0e3979e7ae77a4668bd67221d22d82503fc383bd56bf36d3aadc4f0a5146. 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/7skZAxPzdamID8LePCquan.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/7skZAxPzdamID8LePCquan.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce71a3c2370fed70dd5638d61b6efcba71947713cac7d4a77d153e784004c02. 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/27LNObFqH4zSyKeuRwso4z.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/27LNObFqH4zSyKeuRwso4z.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cd3f0d5edaf082f7a2bb85d694f38237fb79dbc2b546f4f915f8646268b9c6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4YrcwD1LSaHgIqdUWfkIHq.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/4YrcwD1LSaHgIqdUWfkIHq.
{"copyright_id":"0xb98484f09cfb2a35bfec2cad1101752d8a877ef305dfe6e2bea85b6a3904f420","isrc":"ES71G2243910","name":"Zure Mina","registered_at":"2026-06-06T08:35:20Z","spotify_id":"0zCpNPAKpoyFvmLP42kSuk","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98484f09cfb2a35bfec2cad1101752d8a877ef305dfe6e2bea85b6a3904f420. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0zCpNPAKpoyFvmLP42kSuk.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/0zCpNPAKpoyFvmLP42kSuk.
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{"copyright_id":"0x26cc844b1fbbcc05e325c148ae77d75741f7930ce298f8780a40537c8d58fe1c","isrc":"ESA082050520","name":"Zer Da Maitasuna","registered_at":"2026-06-17T10:02:49Z","spotify_id":"4ZGLGNUwpHDqy8XBqBYiVD","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cc844b1fbbcc05e325c148ae77d75741f7930ce298f8780a40537c8d58fe1c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T20:47:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4ZGLGNUwpHDqy8XBqBYiVD.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/4ZGLGNUwpHDqy8XBqBYiVD.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9b375f6bbc7540e00a0aa66d9980e6dba0d21300bd53b8f6602fba0f1094da. 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/22qMZznwqUyKcEI9jfM52U.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/22qMZznwqUyKcEI9jfM52U.
{"copyright_id":"0xcfe1d1790aa252f56897fba6b29bcf697d54da07dbb65999311ff2be64c24b49","isrc":"ES71G2243906","name":"Lehengo Lepotikan Burua","registered_at":"2026-06-18T06:02:27Z","spotify_id":"0LRLGbEPjyse7stawfYv7m","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe1d1790aa252f56897fba6b29bcf697d54da07dbb65999311ff2be64c24b49. 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/0LRLGbEPjyse7stawfYv7m.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/0LRLGbEPjyse7stawfYv7m.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7826a29c07549b90ca5012db8031cc9764bca5d6d24b9d4149c7eba539c57b. 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/6XTyrx3mTkWxdvZeL8KTh5.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/6XTyrx3mTkWxdvZeL8KTh5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79357161cc87ee02c005773d876d4e5dbd55f7c6f56c9fdd0097937a2380ed71. 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/2I3M61Zw5tEoC4VIQ4C1yw.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/2I3M61Zw5tEoC4VIQ4C1yw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d58219daa259dcb0323af4a36b66e6abc15a21c901dac6a6833c6a05a00550. 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/3dFfDTcUaXm32B66Soggd0.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/3dFfDTcUaXm32B66Soggd0.
{"copyright_id":"0x10d58219daa259dcb0323af4a36b66e6abc15a21c901dac6a6833c6a05a00550","isrc":"ES71G2508905","name":"Saldu genizun","registered_at":"2026-06-05T05:11:06Z","spotify_id":"1z3mrITiSsbbmBaidnMvjp","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d58219daa259dcb0323af4a36b66e6abc15a21c901dac6a6833c6a05a00550. 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/1z3mrITiSsbbmBaidnMvjp.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/1z3mrITiSsbbmBaidnMvjp.