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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e32009597f9d21d440bd7170bf58ae971408175079a097d456626a31d48484c. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b20c099-ca04-4f0a-b77a-9c370e8db4d9.json and https://artists.proofprofile.net/proofs/artist/4b20c099-ca04-4f0a-b77a-9c370e8db4d9.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cfb86a6dce394307794e581386c63c554da46591ee027513ac7f1410b1cb9a. 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/QZNJX2445473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b9c4b46d4e6db3535509fe99d7f76ac15b6f626bdcf15c55738abd5ce4da22. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHZ32277946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79276e879f16e48d13a3e7108c67a01015e7c1b7e03872f94e4ae99231c8dd9a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:55:19Z), 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/QZHZ32277948.
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 0x0fdae24504daac322ed3734d4087e80cac25f69c4ddc74d99bd6b7cf306e416e. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QZHZ32277947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f71a073a21fe28e380b7fbb70e84627e1c162b341f9eb972b5aedd2f6a358b. 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/BXZFL2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea14ea9dea22fcdb4e8f504f85e0fc5d69535fb4be207ce6c375f53cb6a5554a. 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/BXZFL2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd13425a09f29d75346cab285bdf19861e4de20097802d650d019031250a9976. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXZFL2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ab3cfb7c7a87458bcf2554d469506a19cf59fda7df4bdebfd2c2ee163f9378. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/BXZFL2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de89ed4360d90261f2a276defaabe50c25d0061a113ce92bb7e5e9b336a00ea. 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/BXZFL2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c886da8ca57975c73f6204678bfee989faeb1a7948ad70f38edbf0863f77cb1. 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/BXZFL2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2906aa6ac9a39048cb102f1be3dfe390cc3c42ce04b969fcb1b5168ca0d7095. 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/BXZFL2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50f5c4aa778be752b4dd39b48b78575cfe855486838bcb9cb20ac3b0c405108. 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/BXZFL2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0160089ed87acd2fc036fc530cad3d3b1ed792c3c6121b26279b395995eb8a02. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRD8X2400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab88ce4ff092710110034c4eb6fcbbe4f4177352e75995d3b92517713468ff7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRD8X2400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14725e82cb7b11d4af21a52c08a9b25afa451a0f6a8caa3792cfdd93c255f6bf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRD8X2400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af602e0362c1d6e56f3feda8b2bb91321faf8a46ed680a3753fa47fef83e10e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRD8X2400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fea7bb5a09b07c9036201d3bb372ba3fc7c9bb70821dc03cb70660285f88f1d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRD8X2400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfbf794a6cc88f040b01da3350597e7b63a21c29efb2d0f88dd7c5255888013. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRD8X2400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da3a39495e97913c3203641c7054cb024b89b619aa3007e1791151ebc7c3431. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRD8X2400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46aed17b5fff093732224b6850b29dfd09a7afe139e704b3dbcfd3c651d32d99. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRD8X2400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9a1db41c2513b828419be4052b69b8cb2a674400d060d51112d5636a3d73ec. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNJY2481138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44d2a1ad937510b0cfffc4bbe34281ad343313afea68f85510cb6ba3fd18369. 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/BRD8X2400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466ff1bbbc70903879e3b1452c5abed5a9121d9238ecc93b4027bcfa2e597c52. 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/BRD8X2400176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0306103618581a01848b2af22a03181aa92132788feb70ce58b7e809820f4e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BXNUW2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77ac60db0a5b1978c314e23aadb3412e5c7c250394969bc65e79cb0571a6e82. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXNUW2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5f0cb3743c0f620cef96782e1551fbd1d04393ee1cb38a7c7d8c08f59d0131. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BXNUW2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832ba4336324a0613f55b339a9ff4ee522aa853b895915d2d1710bbb667470a6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BXNUW2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40d2749245dc57a35a6fb67822df5e4944ce8ddb255ec42f93412897a0a4d61. 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/BXNUW2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480ef9b5b1607d2652f764219143dc660267d000bcdb257aacd9689f9b8dfb3e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BXNUW2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52218ff488ede3416a167594b911793380a68112ae8cb869b1e8ea7d5b1b9f8f. 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/BX4M52100012.