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 0x3b7c6363054d02459a4af0bbedeeb810236857a3488bd41e9c41467d156bddba. 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/5d5f6ce6-01c3-4972-b86d-77ec58a357cd.json and https://artists.proofprofile.net/proofs/artist/5d5f6ce6-01c3-4972-b86d-77ec58a357cd.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 0x545a9fdb05fddfd76f5b7410e81d5576cc81320b877dc215810ce22af9542dc4. 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/ZBU4P2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e0fd2aa8ff93f806c9edb483a7367cc6125e81462f8c88d60910adfa60c014. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ZBU4P2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d91e1cb46997e83e71e09f8de3133a758de25a1a67ab61efa8b5b9edf57882. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/ZBU4P2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe87aa8ce302dffe2cee7cc11f68e81853c09c420801262ace4c2286ec3c5d11. 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/ZBU4P2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbd2ebd6c24778db3761f37cdc92783384d4c80179d1811d1308d5933bfc38f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ZBU4P2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe724719c714e46d0097b3e0e55a933350120efdfcd12e8c79bae18fe6b14f9d3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ZBU4P2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5793e94c544a5476355b14a41c78fda201348a8b20aa4df50169f250ecb56545. 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/ZBU4P2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6094857a4d8634e47a73d25692f9c886a4b2e81ea9ac4ee557b80259bf4e11c2. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/ZAC012301477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb535e7cd2b2f44a8f1e35c121d68e88d0e2ddb412703896fc0262df57e07cb33. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ZAC012301478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5eeeeb354b27f9ec60d9303b4c7d5e82ec04c0435a47767a473f5362b495ce5. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/ZAC012301479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dee264120aa95a28cfff186b1d219db23e15f95a781bc680187200239ad49b. 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/ZAC012301480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb606455d187f84bc4167b3cd045bbaf218b7a08dfabc0a59e003ea2506fa2dc9. 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/ZAC012301481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de2e7b57907244657db809a8bee9460d96446bc91de4f064f7f5c1590fec3c1. 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/ZAC012301482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbf8bfdff000b1c53a2bcf4772a40b61aba09a1f751da23e3a2042606992b58. 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/ZAC012301483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c279ddbeb0f9f5e8378b1a635e21787b803de27bf70f8c163ac87a1ef15fd8. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/ZAC012301484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96e6068fffec0e8cba4089fabae31230231e335fb834f329ae0892771cd60d6. 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/ZAC012301485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9e13c93bed84493c5fe2ea67f4291f34161061dedf665f8db8e31381753fbc. 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/ZAC012301486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c7a18b66603adc56083399fee2f1627cc08a0c2fa6fbd1f8469b1f450fbe06. 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/ZAC012301487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ba2ec464629d5f3076d366110458482d9c6c1b2efe805df6909e1d26d01c8e. 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/ZAC012301488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4727d9abafc44a9e58a09fef77c847cb784d68fdf4c2474a9e4431cc4ca43a8. 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/USA2P2467852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad941ec4a20a2fe0a85592e8eb753e1fc88ba09c97de05697b555d0601893b93. 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/USA2P2467853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6a535d51709d6e3848690e964848a875731305781b770b747c5b5d2d2fc38f. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USA2P2467854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626d2b8b0501a680257277c03aacb1dac4e3ed86920645fa5c254616eb39a763. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USA2P2467855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c34e9046ec9e0551d27c06f9138a36fa09cb03564d68b374899774c5d543df. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/USA2P2467856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52445332de228de760452bf121cae4bf3eb47f16f5e004d618f03237170ac69. 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/USA2P2467857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8a9a279e5f9b0e894977c6a70995435833a83611db202e55a5f20d53954831. 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/USA2P2467858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdda2daa32108f55a7df67abbc83dbaa89265f8f8f6fab06fb8ba758097ea35. 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/ZAC012300634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4825e554fd57d44d787287ec9e7356b9fb41e0e3a660059557b8d52a5dadb108. 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/ZAC012300631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37ac18b0b81fdc9d87cd6fac857e82cf79d836870addbc1b07c7d986c0df5f9. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZES92142035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bb27ddbf98a2e8e85f120c6883fcabcf882335a0f542208b24fe144f5673c2. 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/QZES92142036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb933bf40f33b30ca917efe119d68eb99e73db299325dc170e2e5eb2d1db9f99c. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZES92142037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdc57a705b1381465fde40950994177bf94744accf7e8517bb04223e234bfbc. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZES92142038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4c309666841c83670aff7029fd64192476876475e7c1ebc0bbf1d92252cf05. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZES92142039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536dda43d47898986aa938069eef78e37acb8a63e2c0e9d2e7f424330b03a517. 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/QZES92142040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb056b54593d16000e5f60630baffdcb9fb0b8731c6083011d7520c42740e1b4f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZES92142041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95d79da1bce30a4233bc295c53379fcba942e3907e0542cbf8ab293d7ac2328. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZES92142042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5889c1a90172e229e62152348e7265aa10c3cba547c7950bb1037f3ead84e44. 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/ZBO4F2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f0dd9c3c2b40978b31ca4c961ba1c77481a30342b776534435ae90d4e33ad6. 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/QZTB82314829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fb272e1818b8626c4ad11c377d7c40f81b462de4ad6b4ab8b9e5db328b6a3f. 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/ZBU4P2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a19775a0348c32161f4ab77ee9fb95e7a5cf091577ff7c06212aaca9cd68167. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZWFR2328606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab2c8584b74dcdff9f2e8ead8056bdfc7013aaedaea31bb2376266c301c6a99. 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/QZWFR2328610.