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 0x1179dcfc0939234e101a5c5e91580be5d509e611e6f516bb6bb0ec835f98d960. 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/01e45d28-8dff-4b1b-9329-fa417c376b4b.json and https://artists.proofprofile.net/proofs/artist/01e45d28-8dff-4b1b-9329-fa417c376b4b.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 0x0926bf1fb7f1f6d6eebd23eaa0cb3ec878796c3db929cbb956a5d33d3d2d6715. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ATAI72200028.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff143417fb5e2524ad8f13e148d060bf9ef6fe11aa575458ccce5d952f7dd48. 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/ATAI72300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62e82603b7378f228a147dc14b1464ffb26576467ae644355b259df1f22d144. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ATAI72300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705e9419ebed01f839db92b22a3600ba6ce3d48703026510a2958e76e2219fb4. 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/ATAI72300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4887cc63d847e80382d84a8d45ce5dd53ff9e32e8380145d0363c01ad3b3b0c. 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/ATAI72300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220911b365a0363a002257caac10e1dedbc368d0cddd71ec2aef56ad98b24bd8. 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/ATAI72300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e2a19e405212c267f0ac39a5947977a8eb161d3c9c251baf48d11fe555f2b4. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:11:00Z), 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/ATAI72400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19279869d32a12f5d81d4bbebb4f624619fc193d6caeda1410d85759f32c7a7a. 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/ATAI72400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7d32e7a5caa155557d53af76ca248ec36de514b46a53df5c7eff64d748d751. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/ATAI72400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77ad83380f84b79c692ff917bd3940f5eefd6fec854b1962c4966ba859f5905. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ATAI72400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98c31fa6b2a6678d7f922cd77fbdafa306b34b9dba30008bf21ea14f95ed51c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/ATAI72400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfd922b97d71c10bcf187d33a35205bcab4cdb1cf991cf8ee7173fb462a20d8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ATAI72400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed18f1d7ed06aa57869be71c9ae31918fcbbd80e04e1586d506729b5eadfb33. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/ATAI72400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b191424b1207ccb28cdce058062fc3c98d552fd9c922918ebcdd68e12662a88. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ATAI72400032.