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 0xb480ec037bdc7962bb4838b3fa6ca719ab90b1f4e89fe94f0a5637b005813643. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55c995f7-3303-42ec-8947-7b03b8b2e290.json and https://artists.proofprofile.net/proofs/artist/55c995f7-3303-42ec-8947-7b03b8b2e290.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 0x6385c31dd0e5bdf6e19b7ce4b0377a06e281f4e73d76a3a78679f1a8733bf482. 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/USCGJ1730526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96013932680254ec9bdb43dcb9eaf0fd562f4639431d0ccf3ec122e503a350bc. 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/USCGJ1730529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2765a9ce0c553e3d8efafb8801d48a609fda46e06467b473c9fd1a2b3f1dec. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:52:23Z), 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/USHM21830455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174682b12b37ae57ac87571338e2e123bff943a0d1dc8e0c782434310c2b9188. 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/USHM21830457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a538ee3909a2d63054649b3b63eebd1da131bb247baace4dd052b32227e293. 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/QM2PV1802864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd03d9a75ca5d9719f63c9a79a2acc5a9f32d571a459ff961cbc047f02c0931. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QM2PV1802674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b18cafd1ee3d55ee3ad2e6459b2b4f0556f145cb651ff751332951bb4faeff0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM2PV1829956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e9f57fa53a08cad582f9607c50e6a2f7866a60166a3c5ca5cf941b0a076978. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QM2PV1829957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d75bdcd3a5451884103135fc9f48dd01297afe88a1d6a77b852adaf47536714. 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/QM2PV1843229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0867d40832d6b96ced8902b82c3bf6df30a43f22d9c27e33d7a39289794457. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QM2PV1859876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf4a4b79279daed175921be89cde53e35f5da47113c835d0579e1eab385d21d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHZ31931815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcd1b4a75ca3858f8dab9313066acee51befff86bf51bcd46d9e802f04b76f3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA41999577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42e278b87f6f6fe71b701f984b6f81495b69bc59142df76052947f1bbb7811e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:35Z), 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/QZHZ42037487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281b224ae28acffb1c93eb18d9ae1f55d6779461d517e31547662e06a71b0115. 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/QZ5AB2163302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b00a71328708829280d6442d4acfdacb21b03cbe08e91681f4acfa74ee574f. 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/QZTPX2264145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1ee444b3455ec11e06402f0ea1e81a72bdc109eb8d34a420c2e71dea334a97. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZW9M2242655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b3ff4221a6d547653c7b9d35cab91c56ead34eb3205ce207862be089cd3663. 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/QZNJX2314603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffb56c8a9823582780f7fca716abf8b1662c2959006a199015f043952e7d2cb. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZW9M2337913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae00730f5e8fd4ab5e1fb7e5529f060a9d054787c7e5b372968e38fc2a80e22. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZNJW2456221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ad00f3965ffe02d5b23491b4b95b66a32e0343c4427236da5711ef227455f7. 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/QZNJZ2460143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0fd76c050d0a482c657ba6eaba76a62c4b551af74a100fb24a576048e9b8a3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTVM2459968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3547db987f723f05330abb0d46a1b35cab7b7ccb0d4b9fd3b61d75af39f7b616. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZW9K2428673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6fe9ee1998eb6abc292073bf1e134b8803dab30818388b1644222c9159d325. 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/US7VG2556946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235ff0079e1b505d974890896f2fdf21359e9ca518e8718f0dbae0a2edee0ab3. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNJX2570094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc2f29eb188c5d30720551cdf66cf7bf44366c7d3a7896746e88a5c635b00fb. 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/QZNJY2588790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92335369d17df95846838aff299d9e0e401c7533665d1e4ea353d881190d32ec. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZNJZ2558511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb773e5d760ad11ca789681ee7ac16fb6d0a67a6eaeace0592ea77739abc56f0f. 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/QMBZ91758071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943809739d5dcd1f584013f411f682a16bf136b882aed255c3f8303057d42f54. 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/QZK6Q1958884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda8e037ad8db1988164670b1577ff47f5d474aa1156623daf193f68a3161790. 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/QZK6Q1958886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9969c2be6e347856ea6b007a906ad38625f4d45bbb921e0de206cd0e4d0c425. 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/QZES51970622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbb0046e668730219f3c7c9a2994b9e9427425326796894f295466f16939a76. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES51970634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942933a12091afa6bf171d11e620011572007b228d5d85d4007e2a5ea6e53946. 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/QZDA71897458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7939c5b420baa7197d31c0c11203313ee805fcbd1f67af418a36163288a42193. 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/QZDA71893142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4060e83657067be468b6308110f718c0f7dd63c5a24692294bd125bea2914e5e. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QMBZ91758069.
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 0xef82f70207c17a9d24cfe6827708f71c79635ba136ec18bcb4ca9a2f44a47edf. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QMBZ91758072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778004ab7eaf604764c5e9870a19a719df7d7afc0921d8ddf290f87140389f06. 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/QZK6N2069259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fbc96571d1f2eceb003b631b38e8db957e161458e38f79d4f42ecc1dff1a6a. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZDA71898373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1929eb3ce92de56fc9299b64423bceb60a035ce3d3374218663984e0c3b0c631. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZNJW2497383.