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 0x780fdcb5d48b1e55d26654de5d88d85040a4b0e88d3149b9a4ded4bf4db776a3. 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/0c809912-8f68-48fc-a81a-d78b29a9c010.json and https://artists.proofprofile.net/proofs/artist/0c809912-8f68-48fc-a81a-d78b29a9c010.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 0xe9562de3a9931d05132f30abb9a3a8919587446db5839be3d163965a0e0f7a52. 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/TCAIM2439255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2d067822b9fc96e3dbabe13178f676008e44adeaabcd97d536b315017b2bd9. 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/QM6MZ2484867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6389c9e83e38d880a89547b49177d3b556f94cb687bbc3386ae3955971934add. 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/QZWFS2305547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb2085885a680eab2c9124e5b392f60516a05d8d69a188224bfb5ba7494cec9. 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/QZTBF2347786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bc11789c21895328930a1ed3e2a7c9e13ef11e228c9f36e0ca81a8d9b0fb18. 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/QZTB62398924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987846191f5881ae2387db81f438297b995105696e1fb5796a0c3fe385702704. 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/QZTB22396077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1987b5a7cdd00c1a0a95df143a0ea4071bb0a911c9c4c78e1ef32f782929ff8e. 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/QZRP42315748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c960ca79dd04b38d5bf2d95e52886009910e0ab5b3dcf03b2de9f3b4cf29a9. 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/QZPLR2336477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db8acded54385fc426b558240094024f67070314fb83b12fbfe524cfccb682d. 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/QZNWV2360586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90badd797a99d1e6e69b459538d1db685839429fe50905e3423c34335f21a623. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2368004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8680fd84aba1e1f437883e2e1fdc9f9cf2d1b20e507985ca1a2b27b8a12e5f. 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/QZMEN2354028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa835c8abbe989e879d144b48052ccdca5f6a4540de8adf6e5850bca22e03a8dd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJW2300238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac429bb4723278e7abaa97d66ee8aaeefa5ace4d838c4964100658bf2b4a3553. 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/QZES82355392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413b9b5998e2b20dff7a5d240e305973be935f87b6d5cf3adbcd2dd5a94d9c7f. 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/QZDA42304998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a67969184a249aa1461d0ecd1622ed612135beff3b113a1fd9a5d05d60b344. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB42286033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3cd8f91ab73fe81bab907c5331ec405e36713d6c6fe89f1ae9207e34032962. 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/QZTAX2256781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db4f76c27c29f69cf92a6dc9b91858fcab045dd4c27c20a7da2a2f3d7224ef4. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZHN52105779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3816e4896458ff5fed1258213509a35f59693b4085e6ca696b21ce94bbd10279. 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/QZHN32199078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5fda8cd8d104a9cf2e18e062046cb970a8302df7dcd8fcdd3a730451640ec7. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZHN32191794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c58f05ccda74eb06c9095e4930b26ae585cb5a10c66e694e24b556d8b63e404. 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/QZHN32185596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a361044504b0ddcf4b17c292fad413532564b574c1a634e48a8e6649d82497f. 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/QZHN42112928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab44cf9697af8cb18b4fec1e334ba68d05af52628cf6ca8a0720c640ebd8648. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL1LU2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3374488fc30b7ba31a6137906184be8b94bd7f37e17ac664b8ba7a757a19c35. 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/NL1LU2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2b515c8e9e1e1b9e3893ed29b3b44e3d97267efc78c571720b38be66a1c938. 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/QT3F32484231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c386407a30d19c7cd109d77f92bb0537d5e3eb4d6d12d603cec201392aaf38. 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/QMFME2421426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca624d68721558709917d2b9b841bdecd8401ff00167d8d45186a59572c8791. 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/NL1LU2400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad152cc6e8fb8a06756792b6d8968b8f3f52f6874a295a2eabf14c5b2ea913a3. 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/QZWFK2497002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb37aa879dfbf4216c5867d1b2a304cc11017d0cdbb2b8368755d56ea8d67bc. 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/NL1LU2400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb76d2b1dd9cacbe8cdb0ba30a22416178c60ae5f269a176ab753937b9a346f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWFH2328496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49151f9276f3fd905863baa354da285431f9b2c9d23ecf8e03d19d3baf1cd614. 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/QZWFH2328517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff89ca78e685851fb7343789cc196737108bf10702756e13ca5e84b5f00ded1. 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/QZWFH2328561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deb3c6d34d5985bd655f5a4c4b16cf2af8bbcbe173608424464b14b92705fe4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:27:06Z), 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/QZWFH2328497.
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 0x0b601bf5ed48cb6bf4bf1e5150d66183d20a7707c8f2296b7bf41652f209981e. 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/QZWFH2328574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0563ee4cd68502afb04e3245b609531e4f9c0b57ff802ab426c4451e1eeef8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZWFH2328516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc6d5064f41247d7ae6fca88814db34ed87ee94445d1b3a04db51f9a0485003. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZWFH2328575.