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 0x96e21c2e64e2e9cc9de76bedc0b20281c257f52a2ac5f3c69d2306bcceba022b. 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/79e441b2-dff9-405d-b720-3b4bc53655f4.json and https://artists.proofprofile.net/proofs/artist/79e441b2-dff9-405d-b720-3b4bc53655f4.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 0xd71a9667ac6730ddd7a4636d6cb3cd85f90168965843e692c92620200d2d77ec. 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/1YLJVmuzeM2YSUkCCaTNUB.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/1YLJVmuzeM2YSUkCCaTNUB.
{"copyright_id":"0x8d5de68abff4bb6c786cabd1990524fb776a7eb6c35715182555ab6a91c0514c","isrc":"GBUM70903473","name":"Cosmic Love","registered_at":"2026-06-01T10:26:12Z","spotify_id":"0CSTvWUps1YmpQoXXay9ol","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5de68abff4bb6c786cabd1990524fb776a7eb6c35715182555ab6a91c0514c. 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/0CSTvWUps1YmpQoXXay9ol.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/0CSTvWUps1YmpQoXXay9ol.
MTV Presents Unplugged: Florence + The Machine
{"copyright_id":"0x7130235348674eb381958ff2eb6b3eccdfba5dde8b173e46ed76053036bfb0d0","isrc":"GBUM71201405","name":"Cosmic Love - MTV Unplugged, 2012","registered_at":"2026-06-06T05:40:37Z","spotify_id":"5pgW3hUOrf7LoAv1iW0q4n","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7130235348674eb381958ff2eb6b3eccdfba5dde8b173e46ed76053036bfb0d0. 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/5pgW3hUOrf7LoAv1iW0q4n.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/5pgW3hUOrf7LoAv1iW0q4n.
No Light, No Light - MTV Unplugged, 2012
{"copyright_id":"0xbddfb8de27b74c2ee5f20412e8c82be18f7d3ef7d0df4df4c9df30e40726dc6d","isrc":"GBUM71201410","name":"No Light, No Light - MTV Unplugged, 2012","registered_at":"2026-06-05T13:35:49Z","spotify_id":"4PTPbE3HvhxB9z3SYMBfz6","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddfb8de27b74c2ee5f20412e8c82be18f7d3ef7d0df4df4c9df30e40726dc6d. 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/4PTPbE3HvhxB9z3SYMBfz6.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/4PTPbE3HvhxB9z3SYMBfz6.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b2eb58391b20b7e99031fd6140838e8a6fd47788d578ee8dd052525111eb8a. 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/47YCLbdWctAmEDphy658VD.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/47YCLbdWctAmEDphy658VD.
What The Water Gave Me - MTV Unplugged, 2012
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83223a3cd72c010dcd5b4a0030425442bc24951d30614ffb018a29bd947684c4. 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/6CoVbl8bCxBj25ZcbgK8C0.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/6CoVbl8bCxBj25ZcbgK8C0.
{"copyright_id":"0xc23f29639afdf6ee29683d04d21d9560d51be780b6c4db44ac396a5770521426","isrc":"GBUM71201406","name":"Dog Days Are Over - MTV Unplugged, 2012","registered_at":"2026-06-04T09:10:46Z","spotify_id":"3pRRYcXy3Z0PsAa8griSoF","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23f29639afdf6ee29683d04d21d9560d51be780b6c4db44ac396a5770521426. 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/3pRRYcXy3Z0PsAa8griSoF.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/3pRRYcXy3Z0PsAa8griSoF.
{"copyright_id":"0x40f4fc7eb0966ab8c8b93b68635a857d36764eb50979e9d1b13becb7d8bd2b47","isrc":"GBUM71201411","name":"Shake It Out - MTV Unplugged, 2012","registered_at":"2026-06-04T13:26:14Z","spotify_id":"7eA8EGUwSdCtzraYYaE8ci","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f4fc7eb0966ab8c8b93b68635a857d36764eb50979e9d1b13becb7d8bd2b47. 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/7eA8EGUwSdCtzraYYaE8ci.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/7eA8EGUwSdCtzraYYaE8ci.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71a9667ac6730ddd7a4636d6cb3cd85f90168965843e692c92620200d2d77ec. 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/456WNXWhDwYOSf5SpTuqxd.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/456WNXWhDwYOSf5SpTuqxd.
{"copyright_id":"0x87538246b9abce84cb3d957bebedb9bc56d5c30c77bc53e4969959ba7ea7a7ae","isrc":"GBUM71107355","name":"Shake It Out","registered_at":"2026-06-01T09:57:52Z","spotify_id":"4lY95OMGb9WxP6IYut64ir","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87538246b9abce84cb3d957bebedb9bc56d5c30c77bc53e4969959ba7ea7a7ae. 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/4lY95OMGb9WxP6IYut64ir.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/4lY95OMGb9WxP6IYut64ir.
{"copyright_id":"0x881dd0310992f86d1b9bf2f81b5db4f2c35da541db30029699cc653884e54c15","isrc":"GBUM70913862","name":"You've Got The Love - Jamie xx Rework","registered_at":"2026-06-01T22:39:26Z","spotify_id":"59Y2GLn55BVjX3UTMUDtTP","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881dd0310992f86d1b9bf2f81b5db4f2c35da541db30029699cc653884e54c15. 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/59Y2GLn55BVjX3UTMUDtTP.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/59Y2GLn55BVjX3UTMUDtTP.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90bcca22fb671eeea55b83c6c39d3cd3c4cabef66447a40fe69624688d1e1a4. 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/7efTNoBgYZ3IsB8wpP1f7R.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/7efTNoBgYZ3IsB8wpP1f7R.
Florida!!! (feat. Florence + The Machine)
{"copyright_id":"0x227da56e8d32ac51bbc61e21c55d543d873c49acd9ffd1d1e9388d8c2c0bfa5c","isrc":"USUG12401035","name":"Florida!!! (feat. Florence + The Machine)","registered_at":"2026-06-01T05:50:20Z","spotify_id":"3ZVFcD8Wlw9T9klGqmJf9F","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227da56e8d32ac51bbc61e21c55d543d873c49acd9ffd1d1e9388d8c2c0bfa5c. 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/3ZVFcD8Wlw9T9klGqmJf9F.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/3ZVFcD8Wlw9T9klGqmJf9F.
Reflections Laughing (feat. Travis Scott, Florence + The Machine)
{"copyright_id":"0x8ae5fe4ccb9104ca5ba0dcd83681873457f232e0b186eeeb3fba84226ddd976c","isrc":"USUG12501135","name":"Reflections Laughing (feat. Travis Scott, Florence + The Machine)","registered_at":"2026-06-01T03:09:45Z","spotify_id":"2gyHr9WqZeMtzJOpWGuGo6","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae5fe4ccb9104ca5ba0dcd83681873457f232e0b186eeeb3fba84226ddd976c. 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/2gyHr9WqZeMtzJOpWGuGo6.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/2gyHr9WqZeMtzJOpWGuGo6.
THE TORTURED POETS DEPARTMENT: THE ANTHOLOGY
{"copyright_id":"0x227da56e8d32ac51bbc61e21c55d543d873c49acd9ffd1d1e9388d8c2c0bfa5c","isrc":"USUG12401035","name":"Florida!!! (feat. Florence + The Machine)","registered_at":"2026-06-01T05:50:21Z","spotify_id":"5ExOm0dh4NyRyAdSAO9hyM","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227da56e8d32ac51bbc61e21c55d543d873c49acd9ffd1d1e9388d8c2c0bfa5c. 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/5ExOm0dh4NyRyAdSAO9hyM.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/5ExOm0dh4NyRyAdSAO9hyM.
{"copyright_id":"0x25b0c956d50cce59836284ca58f6c0bf84ddf2388daef9cb7066f2a62d891c73","isrc":"USUG12401051","name":"Florida!!! (feat. Florence + The Machine)","registered_at":"2026-06-04T09:58:33Z","spotify_id":"0UMNsgVC22IulXGKvnMyDn","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b0c956d50cce59836284ca58f6c0bf84ddf2388daef9cb7066f2a62d891c73. 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/0UMNsgVC22IulXGKvnMyDn.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/0UMNsgVC22IulXGKvnMyDn.
Spectrum (Say My Name) - Calvin Harris Remix
{"copyright_id":"0x984c683751c06a00a4c7757a1667ca5ac7eb564b47c5e973c60427cbaa7cd53c","isrc":"GBUM71203723","name":"Spectrum (Say My Name) - Calvin Harris Remix","registered_at":"2026-06-09T17:02:03Z","spotify_id":"01X4D95MClLCZqPCED71mY","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984c683751c06a00a4c7757a1667ca5ac7eb564b47c5e973c60427cbaa7cd53c. 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/01X4D95MClLCZqPCED71mY.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/01X4D95MClLCZqPCED71mY.
{"copyright_id":"0x87538246b9abce84cb3d957bebedb9bc56d5c30c77bc53e4969959ba7ea7a7ae","isrc":"GBUM71107355","name":"Shake It Out","registered_at":"2026-06-01T09:57:51Z","spotify_id":"6NFl4bQgUP5ySJ9UQyzXyb","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87538246b9abce84cb3d957bebedb9bc56d5c30c77bc53e4969959ba7ea7a7ae. 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/6NFl4bQgUP5ySJ9UQyzXyb.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/6NFl4bQgUP5ySJ9UQyzXyb.
{"copyright_id":"0x984c683751c06a00a4c7757a1667ca5ac7eb564b47c5e973c60427cbaa7cd53c","isrc":"GBUM71203723","name":"Spectrum (Say My Name) - Calvin Harris Remix","registered_at":"2026-06-09T17:02:03Z","spotify_id":"0EDmZThnWJodJEjSvDTKt3","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984c683751c06a00a4c7757a1667ca5ac7eb564b47c5e973c60427cbaa7cd53c. 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/0EDmZThnWJodJEjSvDTKt3.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/0EDmZThnWJodJEjSvDTKt3.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71a9667ac6730ddd7a4636d6cb3cd85f90168965843e692c92620200d2d77ec. 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/6gpq0SaDWrIG586UYSP26a.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/6gpq0SaDWrIG586UYSP26a.