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 0x60849ed797791e7c897edef86186e4c8c239429d88901c32cd0d634e79add89d. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdabafb8-d994-4b28-871e-5f6c3ee42958.json and https://artists.proofprofile.net/proofs/artist/cdabafb8-d994-4b28-871e-5f6c3ee42958.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 0x5834bb3bd1ded854d4a8494b43e174a121c210a5630700ae5ec6906fb3f841cc. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ARO4W1400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92880e84ffcc6374fc562e405005f9093ef2ad286f87a30146f0f01eb980145. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/ARO4W1400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3386ab684ec3b23df71c1c6f0cac7edac46006d7b1af76d7206b9afe59707f9f. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/ARO4W1400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e5406388bc3916b26b2d643dbf55aeb58c0b123735e00e8ea2a583abbe6621. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USCGH1982501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88191c927cceaa6efd9bc5ed5a2ee7a68eaf411991e867f01f23e75f583169f2. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USCGH1982502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78496c81a6ab5bcc9ea83f1077cdc7ac0cc935fea919ead3a96df37cc45e053. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USCGH1982503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c547d99570148a711e5e9b7f6f330857c782d5545cfb9569a312acfe1ad0334. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH1982504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15809ecdee8188345b22d08c9e0156536583ed1cb07136a10b929387fbfb8c01. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USCGH1982505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a1f4b5860bfc7d17933bd207dc9bb863e0563502e760bf566ed2effc82e36d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH1982506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b90c56f2e3f22d9f2dd235b86911a1b2c00bec7430e6ac677dd1f83f9359a7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH1982507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40aca47614560b1913243740634206ccf59c596bb512320305338de63bafbc7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USCGH1982508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56efa9b223df950ae020f9dc653fcde5a1814e80f8a6f37f247209e947fa73c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH1982509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8d32d2d86388c732b8d3b23d73d3be2a303a6aaddb831baf2e54049c2a83c6. 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/ARO4W1400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d19dbb39ec5e0a22a680305307933a6c52ba2e5d4db989db277264449e9b895. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ARO4W1400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dc73d36385caa3076ac3bf28ac9697e0754cca420d222740b919e140005198. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/ARO4W1400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db5744d966ad1e48fe1f566a7c2192e1b238ec399340b9852a465b6bc4331a9. 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/ARO4W1400117.