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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f3b833e658610b694987e92141153497a9814e409908fd225cc806d777141e. 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/05a2549e-3436-4762-8d22-2e4818ba6474.json and https://artists.proofprofile.net/proofs/artist/05a2549e-3436-4762-8d22-2e4818ba6474.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaadbe97a398ec24b3ea18bf5725e175bd4d0544d40383cc70537f97a774e0ed. 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/CH6542406403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b351e6fba4c943910674b83afef9b8d55b7834241311ced8caa8b2ea4eadf2. 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/NLCK41025815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417c3d6de3cc5e5f6e3660c1caf0e6b8b997db7099156447b382af6042d6dbea. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB8KE2161559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb8b908e9092de97aeb92d39674b35e759993e7b74ab5a5d0389fb904f078b0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2161560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010a1aa576821b92fbec9b8393a3f7eee41281f44a3e779ebdd239d243eeef7f. 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/GB8KE2319095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded08e2ca63d6a09c35894cf8f7b865ded40fd896f3f8e8a4b44bef7b845aef6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2415519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc04faccc6cf29fc600fc65a6f8a45472decb10fa3cd093b02772b998c68bb1. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NLCK42215518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769e61f75ebd2031160ef118a6822a3ede7d6d931db3a1c9156e71caeffce0a8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLCK42215519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc650748c88233552a383d50dce6043c0865f5a95725db117caa3b4eaac06eba8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLCK42215525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17a6e529fac08f9fd6ab54e9820cd1376bf90ce671e47988377ed18a6129f20. 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/NLCK42215534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdf6f88817e2d5b5a3a1d041e8a78c09e4d76d32d181722fb6ea5573e65d7ce. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLCK42215542.
The Sound of Drum & Bass 2021 (Viper Presents)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70e179a36ed730d2e34580754f2eb59bf3de7eaed3fd851389811eaea38fa33. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB8KE2205193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0407493129b0b54bb6ec8bef7965183f0043dcec59e9e0dbd98b7c113fa3b1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB8KE2205197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ded10afaa054749cceb9eb413f179d53262770fa8419eddc245f4d13719ae1b. 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/GB8KE2155143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf9fe3c6ff733363358bd6c93dd930fa3c207cc5497a3b4fc31c71e82232a69. 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/GB8KE2155151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904968b6a5bb33ccdcdf46bd15afa2169dd326a1cfdd0456092bb24f2d4d2bb7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLCK42419219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531fbff0a7b176c228bea0c52bccf46e7dd822e0814d8d9600505b7189e3861d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2421700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d29f7e24e0a21abe706b98d1ef3d65f1559144b369970bf7aee09d4c00e364f. 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/GB8KE2421701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eaef21c5acce648917ffb67f213706d5e5e5652294278a0511ae232a382dce3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2325016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcee8a576715dae5c0fcc070afb63b9791fbecf45e8ed648dd2696d7128701f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH6542222528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5abd908764fc9e405fc788c3b43fc167f897d0ff56473d9983f7b14f008175. 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/GBTMZ2001057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfba888ae79cf0215bc56743502c04f45b32594d3bf881b6d41b263867dea9de. 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/USA2P1961783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bcb5e745f61f39f22cf1c472862f341661057e958cc972ec805a9453cf9a9e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB8KE1953147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d2d07dec9560195d1b7777edad98331fa627e16797aa7a170a2ff487dab92a. 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/QMVRF1200081.