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 0xa877beb6ca2ddc3d7301962b45962b1345096b1dc7fde47b43657e3c1bf526d3. 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/be9b3d01-59ca-4b4c-a64e-893cc16156cd.json and https://artists.proofprofile.net/proofs/artist/be9b3d01-59ca-4b4c-a64e-893cc16156cd.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 0xfdd05168f8a2b92a2b0404e0b907d011c0c217616e4c803cfbcd720bb0460e5f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USA2P2402474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522de74c6fcb6aa05f7476e56381306983c78ebb88c5db23bf244aac2266d093. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA2P2402477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25119dad002015f9709dd75131c0fe4b809cbd526ef0cf3ab4ed98839b34139f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P2402478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf802009cbb927f88d8ec02094dba64fdd8d1e078037de27859fb30fa96d6fe99. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-02T22:12:38Z), 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/USA2P2402482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e27ef0e81de909211808b17ad27f5cec3454dcbfd7464b0ac01614161610197. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USA2P2411294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbc2878cf8ba2fafaa5d191dff445fb843a96d9cc02d4012d16ab96071a9ae0. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USA2P2411295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d2346501c68df1717d003c2a45a58a9a502283c745b0903eee46156a4379ec. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USA2P2411298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a5a356a3cda133e5f113b203a2f53fd525068fe0b82c83f45595b186fe4280. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USA2P2416206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5411fb985c135c6a44850d7c7b2fd42ffc07460c3949565ddafaa8704e8ac414. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USA2P2420116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a92cd5b36a9261a245c9abe6715c595a19e02f52d197dc08a9720fea500f1dc. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USA2P2420058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad70a1d5b072cb4a8acfca4e3229cb50c4181915a4ac7c208c37c9a6d04defa. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USA2P2425968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d5713528f2166d595ccaa835401925f50f7618576050e1583383a4a73fdadd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USA2P2443085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac898e2f030049e60ba5b079153c5fbbf4ac5d9610d29deb73076ba2a07ba14. 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/USA2P2444859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5681be1b1d66f32ad575f66600e160a24df4fb302f3c2282a4d4966b30b795e5. 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/USA2P2469798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5681be1b1d66f32ad575f66600e160a24df4fb302f3c2282a4d4966b30b795e5. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USA2P2469798.