1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 0xd08403ed52686bdd20d00c4461dc4e41211716e0dcd68470cf0411dded6392ea. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b971eb82-eb31-4cce-bf8d-525a3d621e09.json and https://artists.proofprofile.net/proofs/artist/b971eb82-eb31-4cce-bf8d-525a3d621e09.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
David Bruce: Caja de Música: I. Energetico
Caja de Música: II. Nocturnal, Seductive
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cd8e36fc4fd864a6edda68ce3f966fcb27067f4d3edb96b703a049f657e196. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422312002.
David Bruce: Gumboots – Johannes Brahms: Clarinet Quintet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349b17160d73e5b120e388a9cf275370e83832db4468ab3e431c7eb5c8501dad. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH1644803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90467c04286b52b739fef88d60ba2cdca632725d3e83905435d5f4c4358370a8. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11303617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dff466008a26134954e7df26a341a141072b055cc6fe288dde492a447fbe1a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11303618.
"Death Is a Friend of Ours" for Mandolin, Harp, Harpsichord, Theorbo, Guitar: I. Inside the Wave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9b4000fd38397cbdc49d1ef66cb616831d814ae5b634c0f5bcb0beece6f739. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962000581.
"Death Is a Friend of Ours" for Mandolin, Harp, Harpsichord, Theorbo, Guitar: II. The Death of Despair
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccc9a8896a8e59b07d2c3b18cec313472e793af1229d29e44920c935a2cac94. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962000582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5892722d5d5c4816d822b8bc5c05690290672936b1e718c814bd108ff105c698. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422312001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52826a237278927b05aaa6009d54e6b93181ab935cc440fdb8bfcffd6ba7fca. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH1644801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98148126eb79639a967d720feda5e45bc7ecc4d36f81783ff9a06ef8b57f54a1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH1644802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4085359d05e9513ae300b61160cb7fc7a55d0fc0b6b74d4bae95d92dd1dcc4c. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH1644804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcf3091c8e40770a99a3757e9346e61dd45f389c608432e9b08470e94800a14. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH1644805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1592f3d2e627ee374d568f3991accd11e0043eabeda909f5d0edd6bf14b435c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH1644806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7989482bd50d0356ab5c00a2c8e197c88959e93e080475be448db69895389b0a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11303616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f00fda249b8488d11e5f03364656c00eb86a05e518e855e575312a4762e81b. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11303619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc47a105c4edf518b8fc8039f53e22a38a82b52e7cb44a50f725f02d22c3321. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42054116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c5482dc95f19210ddf5204ed90e30f3ba0695ff03ef3bdcda59db898761e30. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42054117.
"Death Is a Friend of Ours" for Mandolin, Harp, Harpsichord, Theorbo, Guitar: III. Death Is a Friend of Ours
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e07417dcdc1f549d6d6625644c0fc7e2ff4e209faae70832e25e8d8371ba1a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962000583.
David Bruce: Caja de Música: III. Tempo di Joropo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb958adf8818321a1f00b2099b8721274814980b9c02098f6ea2ab30568ca1fc3. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422312003.