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 0x33d3dc55cbe78c3a7a91ca8edb1f3fa37fd350c8f47e12f5e48afbe234e4264f. 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/0414d42a-dee9-42c9-8478-a2c30ed2a84c.json and https://artists.proofprofile.net/proofs/artist/0414d42a-dee9-42c9-8478-a2c30ed2a84c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fdff0b2050f77adae3498ad1bc930448bd6c288d73005d7e1c46cbb03b7ea0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MXF152301593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de5a3cd28349c963f4a039b3b97cb180dbb8122efa15729f3181fea3657d023. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ62440752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedd30aa784f4a827a7269a373e040940943111f9a2aeb89aeacff32dc098fb7. 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/QZNJW2470095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fdff0b2050f77adae3498ad1bc930448bd6c288d73005d7e1c46cbb03b7ea0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MXF152301593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abadee7d528769e760a6f3616362f12e4f2a6c579b289993c0597ba959cade7. 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/BK4DA2401383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbf50aef6f1ebdc9437e820f72c9aa77ffd096b97829e671f4f78f879d85be0. 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/BK4DA2313858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285b0a0d1dcab378b5c7f513842d9d284a29d27ccc5efd32ee25d367b9619281. 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/QZK6P2313511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f255bdbdd72759ad01d6ff4b6aa425a1ce643c5d6f1e55c79dc24036663713b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEM2306106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa719782213020bfb9c72799fe689b333552a21052f8024500278a6f673b524b6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES62453912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5b60c8d5be281b46f6a38b6dd67bdbde861bafefecb46031a692cc56ad02ca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWV2346767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9fb370d08b09b5de48fcd0c3dd310bc4546f54faf382bb2714950c4d274b2c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BK4DA2407532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135fae34fdf9885be2dcc2af20cb14a90c99178aafef2d191ddb7f1f94608c4d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA42420757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6584706e128247a2fbe70e9f06b0565249b0d71ede044d67bdb852afbe809a27. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA42420758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c02a7c260eb6589ed8a1e56fc11302e214073f701bcc2decfbc4cb899e353e1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA42420759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5212dee13470b04c93725bb7a588781739a4052ac1b736a4b714c5955c36dd31. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMZ92375012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08e60ed38c681d86e1ea13bcde655ad3754bc5e76bfb9f54bef87e9ef6a7c7a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZGLS2371985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39a18ce2ab9a81769d51cdc4724492b7ad274192cba1233138e1d4342da309c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES92365412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c93440e50ae322d7db947fd04b54213618ce2aed5465e97f8c5fdc732a9969a. 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/GBMA22307092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1721eac38b642f049aa31afe101f1a7493cfaca1abb6fdb16fe2905924a884a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHJ2356770.