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 0xacf42e058027197249f0f23bf3ac2b64af6bc1f7f7886f45596fb46bb7aa5253. 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/bbae477b-1738-4412-b979-17d9ad5c4ab8.json and https://artists.proofprofile.net/proofs/artist/bbae477b-1738-4412-b979-17d9ad5c4ab8.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 0xc2a568a73ebc9e9066a4092b4a24e43812fc5b61eaa7f2b0db67567716e11c9b. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/FR2X41842054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b948c43aa35e5add09571b95087884316a3bcc1b4790b5916c8213ca8f71381. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/FR2X41842055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdcfccf6f86031d86432873c109d3120c6820453c7b4286766d3832e396716b. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/FRX452105676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32271a7e251b7dfda897fa33e3923c7073a7ebb098ba5ae9786949425a1cd42c. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/FRX872119415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88219d4cd8eb0ea6b881e31d680fe7a4483bbd859ee276538a9e8d238c16b6c1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FRX282218617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd941ed598e03343f552fe3ce1060b154810fd3a2141592c3e1db0c62db5343. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/RUAGT2369201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096836e365ce1c0ef8e6d52e2c70fe84bfc0aed4056af0259e71e77939f2baf3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/RUAGT2424756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecf055a32d009bfc341ff4f37fb99fa65157dc2be2e79291e0c12cf82a01339. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/RUAGT2434844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ad61a6e9a284973b3f2619fdb5bf5f0e306d9cd3d6584308383f5950650509. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/RUAGT2441248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1ca7ecc6d0b4e1f2f06a8022563491ff8b41718df3aceb2ebe0c520943d3e8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/RUAH62408527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf84e380abba7077e3a6c10bc45a9b39660c09a60f1eecd992de03c70f10ae13. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/RUA1D2511614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc3c727eb2c32116e0fcf8215313021702c33057be46b7a5de020f2fb9f7c7b. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/RUA1D2592883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf73a36adb661f2385980cb0fe7065efcf8f834333f56d2f6487b21d7a452ba3. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/RUA1D2589448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb03114b47d21d92f2ad235b825c24f03f7cee898d98677853d2f351a2a4a5d2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/RUAGT2553546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c7839df0faf00c18bb36bef62b1799e56291cbde2b3b0e7a7d00955392639a. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/RUAGT2579274.