thumb|A 2003–2007 Ryder Ford E-450 thumb|An Isuzu N-Series Ryder System, Inc. is an American transportation and logistics company, specializing in truck rental and leasing, fleet management, supply c
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 0x0c0d26323f1d72c9382ae4f73de1bdbbce9c2424185b12bef288a6a849638455. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b87bf18d-b563-4fae-a7f5-697be40af744.json and https://artists.proofprofile.net/proofs/artist/b87bf18d-b563-4fae-a7f5-697be40af744.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 0xe17e732f0c9316ab65f4d699f174d733c6aba5e44bb266645c45d1c0cb4e3921. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAIW2414856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa66e244293c06168865ac2ba1a3f5935a077bec6a75a598097b439b10a4a17. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAIZ2426177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa66e244293c06168865ac2ba1a3f5935a077bec6a75a598097b439b10a4a17. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAIZ2426177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c37481e3e64c4b15d6c054028aec73a37ddac9c8564037f43b9e45c34bdbd5. 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/TCAIZ2426065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17e732f0c9316ab65f4d699f174d733c6aba5e44bb266645c45d1c0cb4e3921. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAIW2414856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6d6ca4a85379fdd055eee638e92aec5c7ff3900e5cdf9f7b14ed365443159a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAIZ2433085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb55a2af8cd6ab5a48c11342d0d5a047d9a21eed8793562fe815345942e62eb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAIZ2433126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3b9834635ab02feb74b7c929df0b6b59e02e4a02211e6693833b690c6a1c9e. 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/TCAIZ2433191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4427bae51790a190769ce55c9b9ecd38f7bcc2497dd91ab54310f91ad48407. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAIZ2433203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e789ec3c303bac3cd36a8d3b633017db438375dfd1164541467160d3bfc14f9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAIZ2433291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd62569654a113e77edc64499215e12abec59a4d5d0af477fdb9bc4424153b0e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAJL2561745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7dc9bdbeaab111295aba4c3f1ca37c60342c998844620a30f3c29fb9a877237. 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/TCAJL2561754.