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 0x91ef127eea33539900a349de51417995ebc0827404dd11c4dff970a2a630249d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9ea5f66-0a76-4e86-bba2-ddc75e14fa96.json and https://artists.proofprofile.net/proofs/artist/a9ea5f66-0a76-4e86-bba2-ddc75e14fa96.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 0x3942fa0b1c072ea5952de728d91ff0ed4f749d533d1473c3c61e3d0846f456cb. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ATM961513003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a989e39779c62d6a524853f617add3e2cb45f2ceb920a1402fbbd65f475a616. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ATM961513004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa4f70820ea42198579a0b2d892882f2d1fc6a5f24ab879e470bbed4b546b50. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:25:16Z), 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/ATM961513005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a02d9d4dbd231f55d6600466b7266f3f701d4e98451d10b854085eface57ec. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/ATM961513009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4872910cbe9471b942b29893ca0c26c1eed4d58eec68b79b8b9e2c33edc7eb. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:09:31Z), 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/ATE311700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6268709e01298e39fada3582870e71bde183bf49860f9eb1039c6e9f82de7014. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ATE311700068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c1dcbe798111345addd704dde1eea457f38bb96c80ed216d74899407f9a8ff. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:54:24Z), 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/ATE311700081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcec67ee018caa02b761775cc79f1cd86d4a4f96be8df9de7f148e6c253e2e03. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/ATE311700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b932955e28c736e0e278592672bb96dac42b4e8cbeb220be51cf18eab95cacd. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:36:37Z), 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/ATM962012301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8eec4b568f3157272ba27c9b331b01e18f3b7e25d0063deba3cf5304cf0cc7. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:29:40Z), 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/ATM962012904.