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 0x619f62f7d5d803f59c118c59ce8781f9499d1193321d1ff24ef7d3c7e1f5a979. 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/a0b8b2ed-1884-4e3a-9413-12f01415993a.json and https://artists.proofprofile.net/proofs/artist/a0b8b2ed-1884-4e3a-9413-12f01415993a.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 0x3e66fb1e6fbe90e414d3a389cb4a4a49fadd65c0830b379ba8cc2898a23306fd. 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/QZTLA2434042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ab8e000e92900bb765f9090841ae5b24c65717c6d7bfcc0fef117ffdd9a123. 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/QZTLA2467772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa328bc2e0481c350bdd6c045edbd242bde4dc78a0c69e6bb9f68e69afe9e4212. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB32360696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d0e71ac8f8401ef6ca932a2e9b4c666efda2aafb654ece7480fbce5e5d94fc. 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/QZTB32360700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a5ad47de2eacb2446269bf3e5014316ddffc3e048486ef83a751ecdc2767d5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB32360701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce34d58169e9b3ff6e09c5ec921b6d221297a42776ed5880a0c373b0ca00f931. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:01:10Z), 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/QZTB32249922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7027ce6b68908c8dfef1c318e9cba9fc1c4ccc4cb0031e4e5717196ed48e30. 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/QZTB32249923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad148f5435a9c756be2728d49f0f79e796e041edbc38037b02df6a2120c3a162. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTB32249930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf755ba7003e0c6d24dd8b89698e3075c91eb9ddee4a3a425f9d8ddaa3b36f9c0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB32249934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825e5b8e4b907686d99a4a796a932b4b4558ec0bb8c4beef251a925f9bfde7fa. 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/QZPLR2051797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d6483f5fbfb3aafa4ae8df407d814c5ad08280e5725cb939208ec4d381d452. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHF2383161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bc13b91e2133b49fcbca9cadf25b694cc2261923865d1c89d7f62515191b20. 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/QZHN82353326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63e4cf9a0655561e53a53827a4a76bf367c4567380b965f93b5535e36674547. 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/QZFYZ2356651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4646d170be6fd4127f7cc2438b46f6d50fdc202b448388c6eabd593d29c07ae3. 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/QZTB82227370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c46c5fd72b4a25bc36e2e7d2649cadc7e3ba684eae4bb33d4a43c5d5a9a40c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6F2263253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03770fb6f004502f8f47c0462c185ba2c60ae9433a4ccf77001758ef271db977. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2037771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6109841923490cddc314ab350d1a7ddcfb203d6f157c727be5f83cb2d15e4729. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2032731.
On This Side (feat. A$AP Ant & CruddyMurda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dbb782fb5f1a67306b1c93b5a850df7073b08aa3c593d9c3f1c18d5d8ac290. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMY2304789.
ON THIS SIDE FEAT. A$AP ANT & CRUDDY MURDA (CHOPNOTSLOP REMIX)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b60a0de9a263e726acd9157e42a49d6f2a1be7fc921e703142db0d2ba01d9b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNN22334063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2faf69944d49948889d3239700d36bb0e7de0007cf018cc421c6901f8ca583. 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/QZK6Q2377970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034314be36be019b2d8b8e08e1e89d39697ae4583e8256af2757093410e91181. 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/QZTAW2203216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf545073eff1ee4bbc7ee0292f2484cb1c7fdef93b1f0fdfe988688f7a3489d3b. 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/CA5KR2080207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c91a7ac04c209fd12aae2fe22f6f555f8cc100dccbb86cc5881e3b882fdb03c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/CA5KR2088811.