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 0x7d3d5b860ab77d755a355ff40ec54b86a395f09f2d2365cc0fe38100068896e8. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e382d0e-8a50-4258-92a8-a32e82b13a8f.json and https://artists.proofprofile.net/proofs/artist/2e382d0e-8a50-4258-92a8-a32e82b13a8f.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 0x675511e68461ec495c7c3c4ac35a4a570a29ad8c2c6810b0b0a1bdc0ea7ed61d. 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/SGW502273574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ee01d5ef639270301e9de9c852a6ddd4b079aacceedb801c90d7235637492c. 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/GXBAV2501523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd52420ad881ddb9acc377d3c5bd6e6562aba0fca45f1e9478f385596406513. 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/GXD7V2516106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9375f8aba201c35819e31c571c7a2688cf5004621a5466a03e9d0e0f4b12c718. 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/GXD7V2501853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5f9b3e43a7f8b0c2b3d5da7bfe2f0753703fd341ac01cd04697b7e53b3ce7e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/GXD7G2589865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dcd2ad4709849ffecb5104dd851b64315be8c926eba13e29a0aa41d73b9bd5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SGW502563051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ece8abf8181891966a3834eb42583b55036c040ff339c3399a221b18ad0a83. 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/AEA3A2106952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca60b588e70cdac290c14fd9e0074e6e0c285dd39c986a669d59b3d1c682293. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/AEA3A2182149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2076814b8a48a656e3f42cf8c8b8519a9ddfa58ae060cf671c11908b1d457d. 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/AEA3A2146836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75e66525f43a5b39bc36ac771c92d826de909ab98b0104bcd8b09705d30d705. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/AEA3A2113495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2562c359900838dd42021226017cc0f1fafdcb5c10d8e33122af7c3cfd13e64f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QT5M42586878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204bbff5b5a11f516b531b732c202e72f1fee5978c1c408011783ee90fc87045. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GXBAV2513394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1b9f778f09e91f6247b02a6d65a0893496511effb4536c67acdb88373829e3. 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/GXD7V2504036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee1fe9b32527895fbdcdfc9d11ffdc46405f37598d39a54955f5d04fc95095a. 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/GXBAV2008085.