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 0x9e7b0ec575e46786907d16f6fcc7ab7f5dc2b90754797cdca06446d6911f2ea3. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa48d81b-6de6-4288-bc2a-867d0a5d1e58.json and https://artists.proofprofile.net/proofs/artist/fa48d81b-6de6-4288-bc2a-867d0a5d1e58.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 0x5cb54e17ef9d4af7a0937a323b43743b1cab8f2f19fd3fff51bc3601fa3d3e98. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZTAX2569150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34ae96cbbe0efb7c147072b4b5d82a2fb27628c61ca09e2a9ffb5c53634da1b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZTB52514887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2703abf1dd3637520a1cbbde449dee574a915c71c301d8d04bad2f8ee5b7e3a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTB52516243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b2459c92e8ab92e32ec4bdf132ff6e36bacb81c6a029188519b13f3ee5692d. 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/QZTB52512666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e21614bc77708822b1a0a3757184e41d8fbe8800cd5763cf058a0d1eb8ed3f9. 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/QZTB52514748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc059d2b4971fca4cb02ce2c5fb8339697ebf57f10ddb7695c9aa6eac32a36a43. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZTB52514884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3918d4305e4e827f63734d55157bc6a2fd84dc656fd5f5eab4786149b031393. 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/QZTB52512496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b0ce89f0ba932301adcea9d127dcad7b0ace8ffd8db500160d299ca8f347bd. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZTB52512375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d230a63306e95849c710a29f7d28c18b92618cda59e82552bc46dd1e2baf3a9. 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/QZTB52514731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416b5bcc76cc0faa5c32d02e4f831b5c108cf3966cb32afd39ffc8e5b147ad90. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZTB52512339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e6e544909575c19d6ea85a2060f5069a1f52a644fa672c559a1eeb9240265b. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZTB52512377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a234017e062308374ba2d70c9db0db22ffd50521101a4903b112930b0f6b7d. 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/QZTB52514889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181d9e1c556aae01c76844004502ac4bba8e6c5a9e3751c0ec18a24b05c4c107. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTB52512374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afe76178f20821232cf276fdcc66c37667139ad2e244c26e9cb452c703e8082. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZTB52514735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c107ab52047f41033adc1f2b3401b9897f7b91772e41b1cb14393e6a726fca. 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/QZTB52520416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8533196e700a1f3bae3dbdbdf6bcf80e5a89e9a610a44d740eae93127b0c999. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZTB52518243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3144b2c48ef62c5fe5854231ba68e4dfd3710e78c51db2f62a3757c98753681c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZTB52518202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f300e6205986e4b480844ca1f8bf303bae5c472c3dbccaf7e1412de4411966. 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/QZTB52518209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5359e9cfaec51a2ba882edbfb818e9b694b94178236a4657f7c1ca58bffdf2. 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/QZTB52518240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7301bd18715dc74bc7b4f8a1be353540a7a5bae4d92ce7909aad5002edfcd4d7. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZTB52516292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40551b937e1d6c5269e5ef14840915294c3f7909912832858004d95d4f5b9e49. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZTB52518230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08340cda5711f3f8cd1be738c7d14de321da3df3e1d0731752db5fad8c33eeae. 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/QZTB52516289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96677f8c062ce8b64e3c6c7fdc183c56fb7f64cf80180a6c117eabc16b8876b1. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZTB52518237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a16a069dc82c642a3f395ed019331bdc49ecc8b4170f026aad9c96860d7ab8d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZTB52518204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2df7c49feeac2c5fd97fc7d1b7029e5c272372f03fcff5e67ef6bf2d1f633a. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZTB52518244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341a16cacd56c254f5189fedc6283305c3d7141cd48f08d56d69e50cdac57018. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZTB52518227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c43de6d06ed085dda9297663f847484fb117915ed8a19f91c5fd9ff40cfdad8. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZTB52518238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4078f9fbf136b514467594359cce1d23816a9cea74a1a800dca2fd82aba9e1c. 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/QZTB52518210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52d4bcae2818ef591b203ec9f7deafd36f0b2870acf3b1163d8a134ec9fa0fe. 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/QZTB52516290.