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 0x3e89a7c68186529abf1f645cf88416264b4149a4151181c5dd37cadeb3131fc2. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71c98361-fc1e-41ae-933e-dc8e4280bf41.json and https://artists.proofprofile.net/proofs/artist/71c98361-fc1e-41ae-933e-dc8e4280bf41.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 0xeb9c0fd730a73b1d2f591a9d708a6bd0f9966d458499fabae84c6fdd5b582042. 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/PTCN10400340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ca355576048c5c48f50ffca4a6be66fc2da46176f61f4be41a46ec3ca0012b. 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/PTPY11800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7a5bc93e304b77eaacce906a464f7174f452ab1c64746303726b6617251bc0. 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/PTPY11800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d60e121d58a06016eeb10101bcca668b1bc97ac2a8890ea3ea7308a5209ff9. 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/PTPY11800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236336fb131054022525e9de829db6323b1c188e6e12f4883cdfb5c6bb369579. 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/PTPY11800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc027fb0adfbf9a71ada5352fb23c610606254d039c37cd57f3cae24eb067b87b. 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/PTPY11800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9f4e8f6ee4b040a240f5b67ade4e4a84071ea65ff37cfad5cf36059b9c67f5. 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/PTPY11800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4261e683479571975b571a57befb32a2a4da177e763a93dae2a33c149f5c81. 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/PTUM71400458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e95969819f6362d353dfc985bca7461f413154887edcad004ed3c9b853ddf82. 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/PTUM71300671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90516f75f53534ed6ddcc77bf79462374e0ec353ed80927d61b5eee40a1b9261. 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/PTUM10400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5d195d2e404e09becda84fb4880bb21abbbd8152e387538afb8223004e6bb0. 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/PTUM71300674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc6ff4a058ecc6861fbf071bdcc86a5fc2d750f27b3fdb62964d6831cae47aa. 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/PTIP11200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0d8bb20c487ce1928df7c6ab484acf1fb3664c73f857d0b1738dd67628499f. 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/PTIP11200702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac376a42824a61c5b67cb3b5181dfdcdb6dd465b3efb553d55b19bed285d545. 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/PTIP11200706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd883e3fbcd29c4358f9c0f3e3ca0827c6d00f48da7b0fc5a6155c816954b9413. 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/PTUM10400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4261e683479571975b571a57befb32a2a4da177e763a93dae2a33c149f5c81. 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/PTUM71400458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b8bf19b5d3cf231b770bc6385fed75276cb8687d931ce1c2f9d413e5df74be. 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/PTUM10400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a09c1dcf1132dd0ca3bca4e8a89032d2aa0aff940b1ac7c648f2787b93bf526. 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/PTVC12000450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07af56798a26259ee219b1646fd4fa27d5559390c85c28c206ad3752e073342c. 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/PTVC12000152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03260b37ba050121e4929150d23b1350e1b60a7ce6bf0c96db569b9d05f7dbde. 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/PT2EO0900850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc3bcf53383b7d7cc1bb35f9198f6d251424c4df269cca00ad5b8c847e63a12. 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/PTVC16500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a53448061ef2d17f88c853a2604f4c07acd94db2cc5732d56823c13867b1f5. 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/PTVC17300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3448e0285c3fd45e140500dfb072f99cb3cc3921b95c9229cbebb70e69b0b520. 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/PTOV19400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f6cfd1e852f2f739f85c43e13e1416653a62730ca22639a29960a95e8cc434. 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/NLRD52415486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff19294ca45234284de7bb15957bb82da1b3117601d7afdec406fe5d3c1835ca. 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/PTVC16400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8059085396617a78cc9fb4ea178b092373f6dae5e8d2635276cb0146846eaf28. 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/NLRD52409937.