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 0xf1404641cb8195c0f129110a3090424177c6691e840e0a13bb64a5461438cafd. 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/bac527ec-e86e-4863-b6ed-aad63e57e1a9.json and https://artists.proofprofile.net/proofs/artist/bac527ec-e86e-4863-b6ed-aad63e57e1a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Johanna (Act 2 Sequence) - 2023 Broadway Cast Recording
Johanna (Act 2 Sequence) [2023 Broadway Cast Recording]
{"copyright_id":"0xe4539afacec2a8dede8f8554c8f2d7594ffa239b28091f4af6a9d1d04f19f6f2","isrc":"USRH12301850","name":"Johanna (Act 2 Sequence) - 2023 Broadway Cast Recording","registered_at":"2026-06-05T12:17:58Z","spotify_id":"6XkY7xaHnpKUirsCJC2fk8","type":"track"}
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 0xe4539afacec2a8dede8f8554c8f2d7594ffa239b28091f4af6a9d1d04f19f6f2. 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/6XkY7xaHnpKUirsCJC2fk8.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/6XkY7xaHnpKUirsCJC2fk8.
The Worst Pies in London (2023 Broadway Cast Recording)
{"copyright_id":"0xe4539afacec2a8dede8f8554c8f2d7594ffa239b28091f4af6a9d1d04f19f6f2","isrc":"USRH12301850","name":"Johanna (Act 2 Sequence)","registered_at":"2026-06-05T12:17:58Z","spotify_id":"0kcZoSJ5Pxtal7zvitS5tb","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4539afacec2a8dede8f8554c8f2d7594ffa239b28091f4af6a9d1d04f19f6f2. 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/0kcZoSJ5Pxtal7zvitS5tb.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/0kcZoSJ5Pxtal7zvitS5tb.
{"copyright_id":"0xfb0a56f9de728afce958216e812f83f72052d8e451da62b6a6f49b93a6715679","isrc":"USRH12301788","name":"The Ballad of Sweeney Todd","registered_at":"2026-06-04T14:01:07Z","spotify_id":"6yHiLeNr7ad2P4jjK3d5Pa","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0a56f9de728afce958216e812f83f72052d8e451da62b6a6f49b93a6715679. 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/6yHiLeNr7ad2P4jjK3d5Pa.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/6yHiLeNr7ad2P4jjK3d5Pa.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf51888e6bb1b3179a76f868feba75fad3848217e08298d8ddcb70d4af824f89. 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/4akggFNrmdp8biTMRmVTsU.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/4akggFNrmdp8biTMRmVTsU.
{"copyright_id":"0x588eda5b7313edb0d208f572a78fe67c8b59c735bd254d8f24f16a78af5bd2ff","isrc":"USRH12301863","name":"Not While I'm Around","registered_at":"2026-06-05T21:21:29Z","spotify_id":"3dveWnSTUuM1GyQLNoIhl9","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588eda5b7313edb0d208f572a78fe67c8b59c735bd254d8f24f16a78af5bd2ff. 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/3dveWnSTUuM1GyQLNoIhl9.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/3dveWnSTUuM1GyQLNoIhl9.
{"copyright_id":"0xb365cf7c0320f637cf21a8727d93866ddf11a8276fcc0b5c9eaca89b12ca00a3","isrc":"USRH12301833","name":"The Worst Pies in London","registered_at":"2026-06-05T06:03:03Z","spotify_id":"7xMxtzwKAaRJ9wiC14aR6A","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb365cf7c0320f637cf21a8727d93866ddf11a8276fcc0b5c9eaca89b12ca00a3. 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/7xMxtzwKAaRJ9wiC14aR6A.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/7xMxtzwKAaRJ9wiC14aR6A.
{"copyright_id":"0x7c9b8280de5916d9a324cef9bb31bbbc5c5cbc78eb4f8db6b55da8c06d3e2d59","isrc":"USRH12301866","name":"My Friends","registered_at":"2026-06-05T16:37:56Z","spotify_id":"1DabpDepNADxxrEzGihRJg","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9b8280de5916d9a324cef9bb31bbbc5c5cbc78eb4f8db6b55da8c06d3e2d59. 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/1DabpDepNADxxrEzGihRJg.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/1DabpDepNADxxrEzGihRJg.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f18f3197bb4f60fae14689310a6d1fe1a69b4b18d670c05a410801864208b76. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7zCr8nnTYW5GHzUs5rppAH.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/7zCr8nnTYW5GHzUs5rppAH.
Sweeney Todd: The Demon Barber of Fleet Street (2023 Broadway Cast Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0a56f9de728afce958216e812f83f72052d8e451da62b6a6f49b93a6715679. 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/43PoJ73nz44Jb0aEUIby2o.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/43PoJ73nz44Jb0aEUIby2o.
{"copyright_id":"0x699837e8a31db7f55b7213cbbd5e1744c77a0fefb15834359fc65c4ec1f38269","isrc":"USRH12301831","name":"No Place Like London","registered_at":"2026-06-05T15:24:17Z","spotify_id":"0AOXX5Qthzsq60OWwpgCLf","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699837e8a31db7f55b7213cbbd5e1744c77a0fefb15834359fc65c4ec1f38269. 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/0AOXX5Qthzsq60OWwpgCLf.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/0AOXX5Qthzsq60OWwpgCLf.
{"copyright_id":"0x69ec5fea4c14fad09ec4135725db0fb741fa589cb3705c52d3dba0ee0a032966","isrc":"USRH12301832","name":"The Barber and His Wife","registered_at":"2026-06-05T21:20:25Z","spotify_id":"0jpFWfTT9D25mVPFrfA3tw","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ec5fea4c14fad09ec4135725db0fb741fa589cb3705c52d3dba0ee0a032966. 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/0jpFWfTT9D25mVPFrfA3tw.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/0jpFWfTT9D25mVPFrfA3tw.
{"copyright_id":"0xb365cf7c0320f637cf21a8727d93866ddf11a8276fcc0b5c9eaca89b12ca00a3","isrc":"USRH12301833","name":"The Worst Pies in London","registered_at":"2026-06-05T06:03:03Z","spotify_id":"46JOBh9p07f5Qq8xkRvOVH","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb365cf7c0320f637cf21a8727d93866ddf11a8276fcc0b5c9eaca89b12ca00a3. 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/46JOBh9p07f5Qq8xkRvOVH.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/46JOBh9p07f5Qq8xkRvOVH.
{"copyright_id":"0xc6d5a99132edd455630880e8858da1fcdfffbfa3b80d26973f7c1d4942ddad75","isrc":"USRH12301834","name":"Poor Thing","registered_at":"2026-06-05T16:38:50Z","spotify_id":"1ZYcncEn8z1jnIbCoSkEAE","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d5a99132edd455630880e8858da1fcdfffbfa3b80d26973f7c1d4942ddad75. 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/1ZYcncEn8z1jnIbCoSkEAE.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/1ZYcncEn8z1jnIbCoSkEAE.
{"copyright_id":"0x7c9b8280de5916d9a324cef9bb31bbbc5c5cbc78eb4f8db6b55da8c06d3e2d59","isrc":"USRH12301866","name":"My Friends","registered_at":"2026-06-05T16:37:56Z","spotify_id":"4HlAKD8tW1xXzgOtgvzCQl","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9b8280de5916d9a324cef9bb31bbbc5c5cbc78eb4f8db6b55da8c06d3e2d59. 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/4HlAKD8tW1xXzgOtgvzCQl.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/4HlAKD8tW1xXzgOtgvzCQl.
{"copyright_id":"0x71e34289b3835e266bad87811a350f1df63e0e2785bdd2d0434ef07e5ff24205","isrc":"USRH12301835","name":"Green Finch and Linnet Bird","registered_at":"2026-06-05T12:21:12Z","spotify_id":"5tdoF1SB8xH53wiBYJYleh","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e34289b3835e266bad87811a350f1df63e0e2785bdd2d0434ef07e5ff24205. 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/5tdoF1SB8xH53wiBYJYleh.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/5tdoF1SB8xH53wiBYJYleh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c15725603a871274cc61810f9b26083d45b81bddbabfd9132e4110157aa2713. 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/2reTK7rBtMT1xSBFKVtnqw.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/2reTK7rBtMT1xSBFKVtnqw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495da04f649e735a5e3c65d2a3e611e12f5916eb06c2f75927e1d67bbfa4a2b4. 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/1mFmf2aQfYSJ355B3hZ2Yl.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/1mFmf2aQfYSJ355B3hZ2Yl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122346a040436bdc09d51d0a778406a184e0d40823ca26b94f261b3c5b0e2165. 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/0qhD3BeZV8YvW4V134SY4J.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/0qhD3BeZV8YvW4V134SY4J.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813e0f2e93b373832bacd127df2319125a01cb8f6f5154dcbdb0e090e9295f11. 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/0yfEBHhdSYlLXSpcf0bLu3.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/0yfEBHhdSYlLXSpcf0bLu3.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3175d9eec6bdadecd6e249521b93664b37674a285e574491ab8197e27e874114. 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/33TneBVrNQq2uYkFABc0E5.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/33TneBVrNQq2uYkFABc0E5.