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 0x9682e117b3e984df9f26c44be927698831cb9e72c846e0619193a52c3ef4856f. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82cd7725-b769-4232-baed-04fdcf7a9005.json and https://artists.proofprofile.net/proofs/artist/82cd7725-b769-4232-baed-04fdcf7a9005.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 0x223336a16e4eaa4dbca75316466b43b5afa2687e91f3192c0197e2026d0cfbde. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FIAOP2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b99f63d211171f2bfdb6afd3d98ec09d0f2142c161e151ad9e37c4d70a798b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FIAOP2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e140053b531e8a12e2b51666c3995428ce5bf6396e1974ed3607a013184c38. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FIAOP2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc737533d2d03ff103b2f86868f743bcf512a0e434282f981a1af831d6c2d7be. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FIAOP2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78f50869545377d2127066d32bc8afa2180d12d26b79eebb9d1cf5baebf2ef8. 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/FIAOP2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9c28e9281276abf0d368802edeb7021b1d5b980018aec375ae6f9b070c4444. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FIAOP2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2740eba6f9c235c2773ae254d8c545c3bc691815d9bc0bcfd395c6d9784404. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FIAOP2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a85b2c161c5a58368eb7f9f7a10422bfa9e29bd61aac1dd9052f63dca2ec41. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/FIAOP2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2aa5bb8d3d8bda8ebafa66cabb43a7a3be0c59c97fbadb533a67e283a47335. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FIAOP2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49efe182deb7ab10909b298db5bd6d3aaa4e2dcdb2c138956ee504bdaabe030d. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/FIAOP2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511d497ed91a7cfabd8a45ee5f382233ef9321a5756b3303fbfb61de6483adb0. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/FIAOP2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6160b4a673fe3237f821856bb26b09c403585a3b547d17e2248312adabbf163e. 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/FIAOP2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1bb9245127b93fb758427be4f6a398e0181609c5123a362a119b1ac778a7b1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FIAOP2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d76dbe030eac4247f5286a3a49ce37d94e84ec0749958bb9f0f8a3983facc5. 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/FIAOP2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0491b56603933dcd064994d19f5630b2be796a92289bb1db23af84ce1a8be5b. 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/FIAOP2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53ef80d5c6c865b6fe6eee687567732880a6271d60a99d050fc4f9449bdb703. 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/FIAOP2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a712adf1dbdb9c4357da037e6a1a395ebcaf2fcb9eccd89dd52dcc4c02447ec. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FIAOP2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2aa5bb8d3d8bda8ebafa66cabb43a7a3be0c59c97fbadb533a67e283a47335. 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/FIAOP2000009.