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 0xaf6539bb235adc2e5102496b0b73d20bbf73d91d87fca9aa0e7bae162f26fd6e. 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/cf14a155-7b9d-43d0-a47a-84177043e941.json and https://artists.proofprofile.net/proofs/artist/cf14a155-7b9d-43d0-a47a-84177043e941.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 0x092ccee73da14d52e75dccfe7a0e63a755eacdf897fcd3735c6b235fa86f95c7. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:44:53Z), 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/SE5752247549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5603c81a8aee70273aa751a585a679bc0d0aaa92d51337cf4d43da4f8f43f04b. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:27:53Z), 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/SE5752247553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb3fcea81230469b01be6d6eb3f8af7fe4562a940e6eb57afbd84cd89b1f77f. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/SE5752247556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8085aa3af696c7ff98e4dc7ce6361aab351f4013a99f956c0dee629643b28c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:46:51Z), 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/SE5752247558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03eabc8808572103f410f19f946bd3dae7d102d51022972da33d9fbbcb79a818. 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/QZES62580287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5c9425929a30a9ed7ce7a93b552f81b52d5737751c1db3b93baa2273eae265. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZES62580288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c720196c68b079d36cf1c3a7208b2b60b042cf2e9c80f54348fecf8a9dce7df. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZES62580289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7660e1f09a6f1605c279ec2295387314d91e98917d81800a62feaf7515e04f6. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZES62580290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda0f9c7b1a65fbe3bf3e06de7f6cd5d2aa1ec40c50294b71ab761a4d6f64dcf. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:19:30Z), 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/QZES62580291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99093f5d2e5a69a666df241d53d1a837e0ea121512b54325b44faf78df11d19a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:13:29Z), 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/QZES62580292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a84d831c1d1c3cc4e73e35e9dce7e3ef99f6059ca50c2d49d8544b661fa941. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZES62580293.