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 0x1350cab00ee3da41bfc68c4c531fede7c83225a53b3f65d37c8031f1e8c7001f. 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/afae6c2a-dadd-42f2-8ec5-817124e63346.json and https://artists.proofprofile.net/proofs/artist/afae6c2a-dadd-42f2-8ec5-817124e63346.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 0x919f8430c9e05da17bd1df44cab8a845a19ee2ddf921b0b7168b7b3d65a6b7c7. 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/QZNJX2491775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba2792e4bda4a04be0e76465795e175fa9f9d4dcba8450a433cbbf234ddcb66. 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/QZNJW2434878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8d336330f3d2b60dd0a1dc7a186dba994cfea6a0687e1c41a519f76341a0a2. 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/QZMZ92439925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad95c328312279fac00b4c4ead188ae6a4f78dd5708554a66b62ceb47a56cd0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:43:34Z), 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/QZGLS2499106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ef322013a03249ab93b7de6585d8ea601545d5882ed9e7af36176204753a15. 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/QZGLS2499108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4230295ed854cf004a6a80b09f6b92208f81e2a8ea405180b0351f091c8a96d3. 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/QZGLM2473746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9484d19d930e8a78db94433ca88a22aaafb40865fbd50c2c6b973944e0628413. 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/QZ5AB2452820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9d42118219bbb8c79ed2ebac84110f00a198acace3723a228d1e1332be2d86. 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/QZ5AB2452821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb241a37d9d11c3dea3095ab4ee2c9eecabd4cebae199f496c2985c19359abe2. 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/QZW9L2386298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4447d83293f062a0192f0b5817a995931c3398b97aa043683b71013bc911aff8. 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/QZTVM2339548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0695e285d3f77245c455b9d6f0bb38b13d3aeacf6cf11dc9f498fff5c0c8b56d. 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/QZTVM2345668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a97a84de8127eac9ad0fc7051f6271c2f8452d80c3f3676d0d77440ca795edd. 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/QZNJZ2315490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cd36ca9351d8836cbd783646e1fd82700adb68f6ce126c533dc072380c95dc. 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/QZNJY2385343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfedfd0b9b1971d1a8e5f65a708b1475c153cf02f166a9f97c5943043723e4c. 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/QZW9L2229849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403708ea73ea54c9f77e8615d0fb02f4fbe26e641a15ee4c80bca20744df6c3f. 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/QZW9L2229850.