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 0xc8004b1c571fc5f656bab03ba719c4d57c2859954e58896f4c3515006d45eca0. 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/e79cf731-9a02-42ed-b17f-9a978d0deddd.json and https://artists.proofprofile.net/proofs/artist/e79cf731-9a02-42ed-b17f-9a978d0deddd.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 0x438cd5e35422c6f395fa690c32269302127ef0825719a202e0be01830c68ff36. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DKADG2300290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb226445186ce5171243f618576e4594f7cf3e5c5190f6b2463f6c17342726df1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DKADG2300309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd677ae17b4d2b2ac5fd87fa7db4aff5ce433b2849b52ea4f01c82cd05ad014. 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/DKADG2300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa46608f3d5a88e8fbb3b5650675f85c8124732924d67fc0d0ed2595f3f38adf. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/DKADG2300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bedc22382759542edba7821fba93193a8bceedc54d4d4dce17486087a78d84b. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/DKADG2300312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee30ccbee1616919edaa42a01095c28ec4e433a4aeb5d0f716f114788e5b2d27. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DKADG2300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13828773556d6f0bd80c78e893189fa205de023fc98eeb94f7fa34eed196bfc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DKADG2400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894c48bf4516676a3c53d707cd9ad62a79c19d26049e43d2cb0bb9be1642a885. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DKADG2400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a40c84fa9c1971dd98e05e667eecf642e630ade9f8bf0e29d33dbda01c285fe. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DKADG2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41679f83b5d965380b42f899a26640f77f0feee7c0f7fcd33d3aa8965f82bb0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DKADG2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b256aee4600aaea77c2be39610320037c29e73de356240490f2c63867d88505. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DKADG2400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086c428c2f1010c2bb0cb0fd294f1f7024c64b5a5f7fb16b0ec3858e6faeff41. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DKADG2400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceaafdb3dbf5d035f3edae4e57b6e49b8ed25860fb3b7831c7b348f6c9a9c21. 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/DKADG2400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e959de448381900d6ecfcc02cacb04c4b53a92d910bbb0d7911fd3f3f1d492f. 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/DKADG2400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6998f3836222a7cf2a9bedd41c498f53678f1735ec986114f3dfc28e1f9d1a3a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DKADG2400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c9913d8303cbc3f9b93ad0584eb875efd07ac2a27ac3dbd8d4abee64721726. 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/DKADG2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2608859912dedc2f1f29b90a56879320e1b84154bf9b25a0e802b788a6bed657. 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/DKADG2400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3c7d7e8614172b6c4a2fe9e25b0d991a52960cdffee8ae99e235868b65f082. 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/DKADG2400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc768039e96d6c6c6fc961f8521f93752c84bfb1be60ba476246e306d9fbc00. 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/DKADG2400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf542b1fd60c81cbc9d5e196e1138984708fc20169c7f9c473da8aec6c7bfd18e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DKADG2400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53148f4d808fc270cc9fc927687b07c15c14b2ac9e30ff8c478fa4c0edbdb86a. 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/DKADG2400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da62a179957552a24dc40b0f7187fee02f40fd35b266aa7feecb43fe4af817f. 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/DKADG2400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbe7424e7746f6a61ffff346f37b2a82629d30fc521aeab03113a1257272aaa. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DKADG2400122.