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 0x088e6b8f2f91fcd89ab46b51882f8ce562f8d2210c30a6afc268a049511c8743. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9235dbe-5158-414b-b30f-c21889773e23.json and https://artists.proofprofile.net/proofs/artist/e9235dbe-5158-414b-b30f-c21889773e23.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 0x0eb1e4609c5f9bc0779a0eaa4b0fe122a87bcbaf478d050975b9edc19dd0ec3e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR96X1889911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0898720ec106ddfbce57aaa578e53da2809d6dd2cf9de574c0931f30ec588f8e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FR96X1889921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8ad3dc8a50c106b74c253e4bfe468defa3788bf26ad1d71a9152244d2ebd7b. 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/FR96X1943265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3e12dc4ff1e3c5a2028e8df02327e07f24d01445d7e2b4fc04a0d3d3b77091. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR96X1943281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3572bfa4b5257c37c477dc30dd4022d7752aaa8da0de78fd8a9a0ad4a0d2144. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/FR26V2040759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61560ae9b8282f8285c6922b06b89287e985da291e4cdfef545b9543a928321. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:01:36Z), 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/FR26V2040760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e663ca4903196bb91c324c2349c4bae17666a04a8bf03b7863eca1a55a61e3. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/FR26V2040772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe841ba7fd5e88eb442a687dad086b8e1db2438d55ccdb0987ed1a8c1540f75. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FRX202107248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f71c17d0c9d88f10f9deef082fd3c718bf6c17feecb4078c1c2354ef1e602c8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRX762102871.
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