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 0x5992e356c5f57dc30611f6ca203a60ef1278bc2a5256e7f2e0c72b43824d1969. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f04bd32-2239-4cd0-9acf-90f40a47736b.json and https://artists.proofprofile.net/proofs/artist/5f04bd32-2239-4cd0-9acf-90f40a47736b.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 0x460128b19ff4c1c34a093991da77d212e1376993c8e4f26ee72a9e0a5a5d3503. 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/FR8W02300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf544a7c8c688a617f33a1aa849a147e0caccf3e2601c58f952246ebbb97c40aa. 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/FR8W02300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54574092c9f42917dda700afda2757304053490666a8f2f9f5eb06fec29788f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US7VG2392335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bacbb24c5f35fbd74f4e17eb556609ea018094b707c342d792cec5df03cdb4c. 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/NLAM42400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08b0cfc1989f389de454351266b3ea470b7200bb30fd7e1f0d15201f847391d. 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/NLAM42400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3ccff7aebfa156cd65313975345db4f54eb0ced667a8a2a9391dbdd12be1db. 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/NLAM42400293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8a559dd7e7e1afe4a555ab47e08580e0c65ebacc8ad5ced688c86aec1bfc42. 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/NLAM42400318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1751d787c86f1776a71f5da626586abd7a6555d5271bd65006bd474b433bf41. 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/NLAM42400373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5879df94ecccdbb4e84773c43dfc08ad84f5c3b6369b29d395790c9b5705d8c6. 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/NLAM42400377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08b0cfc1989f389de454351266b3ea470b7200bb30fd7e1f0d15201f847391d. 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/NLAM42400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8a559dd7e7e1afe4a555ab47e08580e0c65ebacc8ad5ced688c86aec1bfc42. 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/NLAM42400318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bacbb24c5f35fbd74f4e17eb556609ea018094b707c342d792cec5df03cdb4c. 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/NLAM42400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999317e18e5030b79f6e5f5e575257fb712a2ef8b53b2a67f6a660d4bcf709e3. 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/NLAM42400394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b0724eaf49b3917912cd9878be09f1c9ad867116d370b9195b6c27eeecc85d. 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/NLAM42400395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3ccff7aebfa156cd65313975345db4f54eb0ced667a8a2a9391dbdd12be1db. 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/NLAM42400293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1751d787c86f1776a71f5da626586abd7a6555d5271bd65006bd474b433bf41. 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/NLAM42400373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09abdd6108793c2657dce7e401d83642d0780b5764662272e4afccb2198b75c3. 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/QZMZ92542777.