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 0x76fd2ccdf47c01bb33720107d13350aedc15d6908a3e89f716b69a7fe5eb87d2. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08ac5b78-44dd-4c39-bd1a-fe20d887dfdd.json and https://artists.proofprofile.net/proofs/artist/08ac5b78-44dd-4c39-bd1a-fe20d887dfdd.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 0x5d6e67fd3f2cccb8e2ca9e40443dfe93cc559954a568a558ade4bdfe79894a58. 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/NLRD51845591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2e51d2c53a35d6c670daaac61b0003a5ee1564ce3f205d9e5caeca25f9d275. 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/NLRD51845592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139bf005d710495936d56b0d935f0abc832e0059cadefca94a24194a5ddb7f7f. 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/NLRD51831707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7cf763c8fbce44d85b29e5eb0dbd2f3284ffaada87d2575d0a1b8cb36af5bb. 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/NLRD51845595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8b2e48a25aee72c2dd1aee30c9f39ced4923662bc5c9478fc5bef70a90605b. 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/NLRD51845596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fde9b856077ab75cbfafe5328b4c15e0ddd5317c30b76786e7dbd300e8aa79. 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/NLRD51845597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1328bf415edb4c4e6bdae34932dd5c623efe839b6cab870b6fe442fb35424cb0. 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/NLRD51845599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911cd47ea61961f2b546a1968ea8c6b7c8d7c366bb0755045e519d499470ba11. 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/NLRD51845397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69cfe7c31ec626fc2fe2adf110b1b5e1716267d511b65d57c1063483905d75d. 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/NLRD51845398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5a0f9d211301508b3f9db617024e87487ed2878ca636de072e726052126685. 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/NLRD51851000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95459352ba67494b4e11389ecc828457262a22f7b42b72d0bdaa3b8d71c7afd9. 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/NL5MF2104215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d565e078b85f468ea0124e803e9c2ad33673beba2212520f5d312b76fdda90. 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/NL5MF2103962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec4b07dbc85e40d151c01afe26a2e42b26b03397176ced0c07bee558b9d42c6. 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/NL5MF2103921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ef1e90577839fb0f0462869bb030adc0b82b634d26d0d71a725e8518793e54. 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/NL5MF2103064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370c91c74d765e190fa3d66bdf50558c65469cf4daea0ce588f5bd9b8e0eec80. 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/NL5MF2102269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2e3cb2a0893abae4d5c6ad4601b0fd493972a252321e8d48b7914863e2b41c. 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/QZTAU2552034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b8995669d015b98eafa1dbe1fed36ae67dd361453ce0b7e33f80253886a636. 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/QZTAU2552035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7da3743dfa206da7ac5fef6687ee19697337bafbe61467fce3f1f38d824b30. 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/QZTAU2552036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cfe74328bb2f48d0dbd7b70e7e4ec030b6ea6fb6ca64abaa46815193f04c45. 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/QZTAU2552037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290b7b50dd0f1feb802f353c347bc4bbf073316c01873bfe3a643294fe740c2f. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QZTAU2552038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d3ef12e6d7819ff9294da5d181f87a67984d94f133fcfa395c1f59ee8b8024. 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/QZTAU2552040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08b005e2227e4707a4cfeb9deb599bee1214cc56727e37b75f71b24ba4eb354. 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/QZTAU2552041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52de4b21bbf237c81f2ed11d27cffe25c131960cfe2759b4e1da740b16236aa9. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:23Z), 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/QZTAU2552042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fd82fb5d9a7de7da52f5d5a5be392fa44e8d34ed132ee2a5a2672238eb4d6f. 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/NLD322300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a4b53e512a89cfe87aa416699cc21e7c3fbed6d6405e851507b041ae364e2a. 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/NLD322300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb356fbf5c19a3a6e14d9bdd90d4634d78c786c15ddbc0da74ad54ad673408380. 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/NLD322300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89b129dac6666f402207796dbc4d080445c05acc750020e18af561e7ee5e263. 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/NLRD51831995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a7b9ffb1398067df068a2bf0410bc0fbf6da93562d0abe9c9e0f36c76e26e8. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLRD51859858.