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 0x1d9a924e28c8765e93f3c57d5378ed884311ff8ce74aafdbff44d4ea95525395. 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/32f750e4-4c5e-4c8a-a8aa-0dec8fa9babc.json and https://artists.proofprofile.net/proofs/artist/32f750e4-4c5e-4c8a-a8aa-0dec8fa9babc.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 0x5bb26ec68b101aee3d328da95912322e2464e81cd277a2932526fdff217f1368. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TCAFA2000350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c82b6a155c00ad65d26129657d33dea1af4dd930a9e398a30d1d2d8d99964c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR33T2268012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf62eee79fc95f4636335a60b0629da2cc4af0d114d32c6ea4358c3879dbfd1a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR33T2268011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e639e30ee8c6dc9d3c4d57fd9e7b84d57de93a9529a96c4a9a93c46c1f4425d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR33T2268010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55b2af4a2e18a6d826441a3a177114fbc0cca69c41bf8c52006acf5d447c243. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR33T2268001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fb7344c3df299ae9a6ac4b710bb27742a53db4d780998173f0fd9ce2896433. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FR33T2268002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83de104d52f867cbf2a6998d0ddc159542c5cb04e4bbfd850f632cc7df175b1b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/FR33T2268003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bda91d9df32728540690290e7dc03d4c340666c5d03cd6e492d714c9b905559. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/FR33T2268005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd3f45b1008db705b8a084a9461ac3636beed0910d53465d192e295a3b40358. 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/FR33T2268006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d109c86bc97bec56cfb0a9b532f64b600d18f69a5fd90f0aad6afbf9a303d2. 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/FR33T2268007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2ef927858dfe3b01f23153b1590efa5d1f328193546729c28ecce160a7d8d0. 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/FR33T2268008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c51478bc6f2ae628d07bd4dc202a22806358e16de1e7cfe53e534b6e353d69b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR33T2268009.