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 0xf402b1fe344d9e3ea55dd8c38c98d5a715eb9da0280e20de2b2e82c5d3a91f0f. 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/5bab1058-1fc4-4e21-ae35-e5a39ea3fa35.json and https://artists.proofprofile.net/proofs/artist/5bab1058-1fc4-4e21-ae35-e5a39ea3fa35.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 0x3ffa7595a3987b52787c3c650c4600e3363f8c7185ca0e9c007d47c8a75f94ed. 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/BRRGE8000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dd5a45e200b4f3af7c36d265bb610e1b88605d6026269fc480e74fecbfd8cc. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/BRRGE8000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd809409738ff04f0ee06631ba5a4b103bfcdea6c8211c83a017cc08e38527cf. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-15T21:33:28Z), 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/BRRGE8000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd394bb8df43b6c57d345eb8c6e0cb5b6538b0bb0d0a7119429220b0d1e3c1b72. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/BRRGE8000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca4d47ad9ce66115cc6447b3fcc5598733d4a1b2682d6afb5b6b2aa6f5fd4d5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BRRGE8000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e32ae5df0707371c3f5c0e1fb7223fb05e48dbdcde22788ba4eaa6fc9b0049. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/BRRGE8000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ccf409870c7ad6d0de1b6fae8e544ceddf5054188f8fa197cb52df2916ca0c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BRRGE8100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9718d322dac39b862a39261a88f372a3133bc96b717e2f474af8e41f972fe8. 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/BRRGE8100123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe484322a407153bcabfd52c31af3ffb0cce649c182fd261be9a849bb0078c58. 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/BRRGE8100124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37eb3e86856eee82ead4df653235c960210f7f03de7da56f621e2fca50297414. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BRRGE8100127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bb56081d31b5093b3533e690c902e39df48be8362e5f864d40cd9b2048c7d5. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/BRRGE8200119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059ea7b9aee8278de5f814f81c736148dad479183c426ee48c49a445b4dffdb8. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/BRRGE8200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29529a7999aa5519fb296f5406da25a244967faa65e19be083dab13f151f3e2d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BRRGE8200125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e697854f9c0edf1a9fe072e95a4f0e2fe836cf33b394d7dcecae86cdef862d. 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/BRRGE8200127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa978263e6a5624b7f9d4a3ebec68e6697f386abd1d3fa072050daa2a38b1cb8f. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/BRRGE8200129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ee53492f22b0ef2f9abe834fc959935d7d7ff177f85a699b6bad327dd8bf6d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BRRGE8200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e4acbdc3c65e260b9db31e95c43ea137edce16efde0c545b95e86b027ddf82. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/BRSGL8500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fdcff7f8c45825a7f5f9b47f7d3519fcb7a9c9f7d849c9cc5574274edd385a. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/BRSGL8500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d11eeda667c20d26add448366846407e73beb1cf50dde7706589a0fb4c9b87. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BRSGL8500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2644c1023ec8f16c8b5fdaa9aefb0b78ac05d30220496b75c439c655e8e00d3e. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BRSGL8500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d9d44367f47ddb48b4e95323a2d14abbb242fe578b0a7779bb45ed2488fb2f. 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/BRSGL8500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509446870276dd516b4f055d9f502b1316eef6b99056f24e0fe5d60dec5c2bad. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BRSGL8500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd4e6b40df222a8e6d65dadf30ca2830647f306810ecf99e781d82e06cd600c. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/BRSGL8500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bdf9e7b304b1f9374f4dcd6c094bd550449fbc169579fc607d362e4a79cac9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRRGE8790065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0122b8e3d205ada7612460ca48e2e06c0d86a7396f2fbd1553d15f863ee3f741. 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/BREIM9300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f61d73a4be979c1fabcc8b8174d4c6463fe015a09022a440265fcea049f962b. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/BREIM9300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3be0ae8f815dbfb2cf144175b798fbfb8d4db7996a1d8fba686378084fc57f7. 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/BRAP61200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143721a9754788529428d00876892ac101d2460c7295409c15fdbeae089fcfba. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZHZ41908290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73477b29a745e5e5659f03912c3a7a81d285edee886353995e7f43ae94385797. 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/QZHZ41908291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8063edc62182eda224f3e777dcf2f878a12f7bbc88e16b466488b3bbe23d90. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QZHZ41908297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a605980bf204a6d7ce5e4ace1fe525f8454facaedf9e92bf886b6f93560d8b. 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/NLRD52348423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8521873d7c6023d4c3033d37d02afb78581bb239cfaef5c1f463a61b96eb1f48. 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/QZ5AB1823177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c9c20462ee2273a780850e95a9708c58a21d4843fdf93b24f53739dacadf0e. 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/QZ5AB1823187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143721a9754788529428d00876892ac101d2460c7295409c15fdbeae089fcfba. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHZ41908290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73477b29a745e5e5659f03912c3a7a81d285edee886353995e7f43ae94385797. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHZ41908291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8063edc62182eda224f3e777dcf2f878a12f7bbc88e16b466488b3bbe23d90. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHZ41908297.