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 0x27580a675f7571bfc10af291ce0e12f87884b15d60c10301c59caeab72473d23. 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/dfbc2b44-9c82-4e40-9cf1-aa8023625445.json and https://artists.proofprofile.net/proofs/artist/dfbc2b44-9c82-4e40-9cf1-aa8023625445.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 0x41f5f4841f927e5ed3cab73e4ff2f7b38b2e3c39be4d52e824922708c81b2f79. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/CA5KR2336622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105a870d0cfcda8507a7ba23aa9122776c97da8d39e67a838ccd0b021beb9346. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CA5KR2336625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81d19b8d6008060b064959c68e2c1ca4bf756cc9ee5d4aa13b6517210110706. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CA5KR2401699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8658806ca9924d7f1e1ee9223eb04903e38945f46661116e7afb7d2a079cf509. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/GBUM92400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0c55c68351febe876dbfeb8f2380a48933bce1c938e2801e28f2619d966dff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CA5KR2511334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3a5f766f1970d437d74b95a1f1286f2623f82c84ce64db249b81ccfd3d7992. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/CA5KR2511336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12600d4c30ded64ecdb19c56aa9ffe4f11de586502537b55a8c9e68571d189d1. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/CA5KR2511337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f762eca7946b1220df534607846290f59858382e72014a18a9da6ff4ca785d. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/CA5KR2511339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ce72bf2255c3c104beee5b3a5740eb5624fabde6c3dde95513a11ed3c16822. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/CA5KR2511340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813d89804a0e17cebea3207283cd26460a7b5cf53da92d111458819e4c5d5dfe. 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/CA5KR2511341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a1cb3d1fdfb9047abb181fc30a6cb307b5c6ad22fce9cf777f54a36319dde1. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GB7YL1896108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff4d88ce0b16d9e63e84c5f0e448a5ee6da2fd8e960382692c1216a79e9b5ac. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CA5KR2437487.
Best of Bassrush: 2021 (Mixed by JEANIE)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7567f5f8749a79a0ef067facc66bf20ee5768cc9624c5a78b9edb84e4e6e8ba. 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/CA5KR0033227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed3169917596901057dc683bca4e6fd8e7b8e8bb422d4d61eeed8e45c231701. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/CA5KR2401639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43857d7537a6b7c919a58ca27c3681530608f8db27e6c769dd3b377be2249f3e. 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/GB8KK1400201.