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 0x1392ab6ec04e8ffa17e3982a93b54030259c4eb1f439afa831fd7a7631da0c16. 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/70e80422-eff0-47ef-9f5c-1e6d8a8173ea.json and https://artists.proofprofile.net/proofs/artist/70e80422-eff0-47ef-9f5c-1e6d8a8173ea.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 0xeceb20767916e79413fc081cf58b099acd9a3d2a4d2d6a1b2623756ebadeab73. 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/QZPLR2392683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bee4eae95ab6889f498b05d850ecf35b87691e7ea27d72b3a41cb9d719646ba. 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/QZPLR2392684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90612edbafd612690e0425a1dc1d27715ac1ca5d2089b111dce2590bf69b74f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZPLR2392682.
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 0xa4a32c5793e5dc1cc9e2288fc23092917fa1391f39bc1d1488866ee4adaadecd. 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/QZPLR2386870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618f410cff5b9eaf8eb24208883d9a43f431c6152dcd7988b50017bf92578dc2. 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/QZPLR2386871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fb2ad009cbff2fcf9d3fd38bc8ceec0cc6b321b8b03ac93ac014e8f045bb2d. 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/QZPLR2386872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53e64e8b029b459360b448ba58ca39b310ed628dd9c6179583d1ec5abc7bf4a. 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/QZPLR2387574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da5d9f31cd00efb433dca785c01d8bf94f80aaeecc1a1f36610c2e149b8d463. 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/QZPLR2387575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24aa60a80c6508c6f6231cad12901a11913a4caf0b242e82083ff85db4fdbb6d. 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/QZPLR2387576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f4ab635f2c82267437fc2e10e93f38f9727149f414f55832804cfb90b5bdc6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZPLR2387577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa890255a14d3f4980a1d8fbf58e1fa6e59e2c0b6fb08838225f424d67c0d8ad4. 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/QZHN82382905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6999de97478279ed1c26d50ad5f3f10a99b758fda652daa757d1674624f745. 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/QZHN82382906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d73cf38e8c2ff490828e11a594b748c10c5b459ce2c8c2ac9ca58636c47af36. 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/QZNWX2403609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bbf9d4b644a4237c7e492d10cc9ff70cddb96a04209d826e98325c8c3dd6f0. 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/QZNWX2404406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfe797d3f754a3e2e55dcb4880c74d4d2afb17693b1b3667a77f12129d6b000. 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/QZNWX2404394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133261348c4eb3caad15a29cc3a8c8dc339a902bef8a154dc6636811e54a2d01. 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/QZFYY2452801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c9c7004827e6551f73b20dc2d43e6a63a93cf5d132ad330b55cbfb39b4164a. 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/QZWFQ2336926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f170a34cae956c086adb6fe7a6a1985db84aafd0c1d30474f3a6d2790b2755. 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/QZWFQ2336508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241b1145fc33d1721487dbdb1e0110c3ff512b51679925ca39c12c8a4e02d8f0. 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/QZTBE2363677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbf265f369f7c25a21e131ff5b8d98c395c1cfd4730f2533cdabe88313a7256. 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/QZNWS2394611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b5835bd3c71bd6b942b4cc4ab64a58955fac9920edb266b4f9a31a41474bde. 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/QZNWS2394615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2188b1d1429cd35ab4c5e1cd30118ce5a35505ae0fd70e22d7557abb3d87a3. 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/QZNWS2394605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f2e5502d0be3c925f730e535e34f58756d3200ea6b836ea9888274edf4c498. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZNWS2394609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c27bf2e9bb1ce0c28e0539dbe956314957f35466556763d1be5e71d516fb5f. 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/QZNWS2394601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312893bbb3e3766dfcfc672da2f5e07f4603e4d0ba0c46ee6618be6eb3a42632. 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/QZNWR2393990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e6761606b9e12824ff2ead4e6a9388b5cf243739d92918ce654636e98e2b18. 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/QZNWS2306246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bbc294e03239c0902f1b801e0c0b862c0ee95e5097650db26cf2bab508f533. 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/QZNWQ2384729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b456a6762b24ad73cf9011f72dfbe3a221989f4699fdc25523a9bd8b567580. 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/QZNWQ2382803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7204395414b462614bc6f85e072bbad782b0a052b5e6e5d92f0666dbedcc8e5d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:55:45Z), 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/QZK6H2375088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a54909efea0bcdcf9b009b26f91ca7f13e5fe6d5f6fa2a44ce0a4f9f60caef. 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/QZK6H2394880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca00409e6dcd6af60c0e519cadcadb4bddb4d50902595891edadd6882ffd5be6. 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/QZK6H2373598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb413934a87f70fc01e8961410e6b5e5c202f87c28f7b25fc03985f7583d8bfeb. 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/QZK6N2348694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074966ac11635f7caea1d8eae19e2f3d4cac1c9737f117ed47347bcc87f67ea6. 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/QZK6N2349136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abe9a034524328800b709dab4ae43d02e97315ee1b35ddabe59ac9389553f48. 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/QZK6P2398715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfa870e14b7e6555a4a6fa55a881b960d72f3182e43c45489b4d8aefb6b3b81. 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/QZK6P2398714.