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 0xca0498b0bc687abcfff0d4780af966e1edd041b35d94e092bfa3b9c7c57b1d85. 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/740d4b99-efa3-40c0-8f73-a91c97889b2a.json and https://artists.proofprofile.net/proofs/artist/740d4b99-efa3-40c0-8f73-a91c97889b2a.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 0x490b3f2227d24bb93044fc4a2f77f52d0fd76565851163ca76842efc1b806fe8. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USUYG1294665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41393875216120480eac4e266b54b0c30a68d4b7c0b4179cd7e776a7831e3283. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USUYG1294666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22bb6df0b88d72f05a6e453b458e419b75b6ad00dbf59c84348c1060be804df. 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/USUYG1294667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c9192ed1794d4479ff29dc1db7e07cedaf6950b0814d9de954eadfe1ea375e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USUYG1294672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1498a729e51334e0822c8a9b1843076e6c552864efc583d2158e880e05ccc66b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USUYG1294673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1128ef36e19953428a25b2c19bd6b18eddf95bf27f20b5f6a6c30f4867684f7f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZHN42161530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8bd0943059db86ea07a40d54d7f33521165f2dfcac87d87a179ae13f0b7d1a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHN42161537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9b1bcd9a2e4c378dd3a5aca77e28452d344f30eda0d742cc5ff1282ae4adb0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USUYG1404187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33e476515812d78a9d613bf95b2c0924495002ed343d31f1f17427033c5f77e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USUYG1404192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595963efd86cb67a2f2b5026c836c9b8d6a9be0a73c58bdbe5cd7d763c3fb065. 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/USUYG1426448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b094b5ac5503803ad19090d90fd9991f70408a3200997b5dcba9e82939ab729. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USUYG1435289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35863722d7e09ca72bf695dc892a05a7d1ec5e7ac929a6a6d3c7a48ba87b8f6e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTB42413858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b55645ad07f41ea42346cf5c830d2d5277f2349a090c7769b2bac9e1263b6a6. 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/QZTB52426582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad1999c5d5509afa1cbe6a2f0ade727769001748f3310af9df1e863f8f84405. 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/QZTB52426584.
Can't Even Talk (feat. Dolla Dame, Los & WB Nutty)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a696444b800b66c8c1f5b6dd9b675b828881f98e26277518436a30ec5489a8b. 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/USUYG1441829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f6f18492db6851a8c72d79d21a820b96d95dc5a1f22fb3ffcd37a251e12fc8. 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/QZK6P2022342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2138e5c7fa581cec788c68126466dfeda0d58859ef5077dd2cca1d6ec299922e. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZK6P2022343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73712c788b550137b271c2686dc3ac839f264dd4c50c886e8e19d12825f79d39. 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/QZK6P2022344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7291f30ec5208f8d9e9f4c644a5d1445e103f7d9ee9abd97263995029a1f2e. 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/QZK6P2022348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b88d7ed34101022d5a8441d8e251cb4b698e9a74e41fc0a368794e064b1edfd. 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/QZK6P2022349.