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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 0x0ca858b61c77a931808317b8a72db738f2b5feb0f5b71c83d081c03013e3591e. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ac51b82-0389-4a17-819c-a3e59594bd36.json and https://artists.proofprofile.net/proofs/artist/4ac51b82-0389-4a17-819c-a3e59594bd36.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 0x6422bbdd79247a690399f5f00e97e2cd62f8f658ce2a8609343ea38ed33efd74. 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/QZTBD2315029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260f95f64bee424a4278c3d5210a9167a20349be1439540d26ce8e83b10eb536. 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/QZTBD2315030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cab64151d75f431a005b114ad15ecfc712886c72541168e58f248f079d2a113. 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/QZTBD2315031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabc6087464cbf724abbb3460f3d027a266608b32fea4ee18d586fbe1e9f096a. 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/QZTBD2315032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ad1a00837be5f7921f4540386d00d72155cbfe26c4d2e672cfe9c61e8fe398. 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/QZTBD2315033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098c1d3dbd46b4489e774289113354016bfc0ac65f6b3775e29fa3822b6e7e5c. 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/QZTBD2315034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf405b6d18725cbf7c863478fdafb0f12cc55bb7aab7a2fe8bda8e7c4823cca29. Chain 2 (Bitcoin): anchored in block 957304 (2026-07-09T12:19:34Z), 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/QZTBD2315036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1454fc6687d0a8046b976069560e55e4dd2acb1cafe861c8b9fec9f156e6b19c. 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/QZTBD2315041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49663cca7e24a96f43abef66fa38e4c01ed4c92317f11938a794609dc51cf32. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTBD2315024.
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 0x523c043a34e4ce93b03fb77c9e65872d3fd33c4157ca0b96b56e60889093a45a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZTBD2315025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539523291dc4afe0ee8fcb29ba8131ee0a4e22dc699a7044a6b6faee293caf19. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZTBD2315026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa626ff68a8a64383727ee0cfd6833839a2ab63c5511b5e0f149cbc80cc6d76fb. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZTBD2315027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d59c004344a5525342cddf6910bb75bc3d10d7cc42e658fc9e916fea0a4d98. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZTBD2315028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fec275691c24fe58ab03ae95274c3dec11fc95e7da69b1142c1fdd444abf4f. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZTBD2315038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9980db0d37da839b49cd87f9ffbe379f65b5d9ab479614a1fca10a1b62dd73. 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/USPJ90800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5c1b27d40e782bf2281da9d0fae1b58c78294ae17f48d289082923a30980f7. 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/USPJ90800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba50224a7a0e6842af85d7bd32d44a4fbf04859adf5d416d8200a4a70518c64. 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/USPJ90800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdac2a62cef9511adaf05006c2928bea160cfb891b604260c666f2829df6c66. 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/QZNWW2302385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9de69374e17ff5f00e1c77bfecd904d8bf67e05b316991538d76542ec43886. 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/AUMEV2370963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1363fa83dba8ca2baa4d4bc11dafbbde183e4bed5e94877a58f6c3b5b304dd29. 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/AUMEV2274542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3f137ce27a79521be6b187635c19c64885577423d58a40d912024e541ab91e. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/AUMEV2226411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1243811c9e1af0c9e282263c6e76b0ed51bea78f581c7801bbc15a4d140e5859. 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/AUMEV2203435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab499aaf981b6c8fa84d48953552366f64383ab24e12d98327246d16c1671188. 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/QZES82105836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed094d6a9f1625f593148d75e238f2f3e2afc0a4459c4815e450713c2e0cce0. 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/QZHNB2009283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b67d6009604edcadce6ee0f017f7c6f38d599f6e924dffbb82d699048ce798. 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/QZFZ42060636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07773b3a2ec0c6837787c7e384042f7f7bbc4bcec65ece8b1fb730c36ba6fc7. 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/QZFYW2097598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451c6d3538f11ac06de3f363c15046e578bd8cb8613362000e1c7a1dd0d519ee. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN81978265.