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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 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 0x2fffbca869a0ac0195b6ddcd451dacf51d9bb563a0b5110dcf402f6b71c68599. 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/5f492b70-d911-4f17-8601-1ebe532ec0c6.json and https://artists.proofprofile.net/proofs/artist/5f492b70-d911-4f17-8601-1ebe532ec0c6.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 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 0x83bad8206da45b163e79fe8814607baaa123c0b66604f1b3c2129894df81154d. 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/GBLFP2234697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a60beaf63a010658287ec5010fa04473813c2ab5ee3c57ab98747904636d28. 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/GBWUL2311418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8f8808a08d856db758d1900eebf207eefe1682275f2ff28b0346d34d2abe33. 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/GBWUL2312489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3853c059774cd8ef12844e83b0dcd9955e47ca1668a05f70de0dd3086a059174. 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/GBWUL2312554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031a1e6a0e88bbd9ccb8715e3a10c4fc12940276e42d2481f149e53f2a639485. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBWUL2312567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7810f50b759998c2a24e5de11451616cacc17082895cecedc40b28fb3be0c4c8. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBWUL2312594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27094773ad2326602cadef55bab308c43ccb9d409961132f58fda640221315c0. 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/GBWUL2312613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e4af7cc9ea67fdb679ccc91f19761d25a4e528e037a117c0f9081998417972. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBWUL2312630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cacb0973f56a0ad017d723c1780fb06678a6688f0321f73fd73529fd336435. 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/GBWUL2312658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe637dde8a9d2f9c8e5f57f10519748e5d8036640da5bd2b5dd1cbab1df1cff7c. 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/GBWUL2312664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9936ca37db2f57415aefd91b73b0793a0d84625382349e6b79dd2ca17a94bb4b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBWUL2312702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fab366fa943ce9d9b77ce84adb76842ac97581fb66e1ca0272bb58973185989. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/GBWUL2312732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe0fe0a39fc6f5c89a85c2c89274c939f74726c32010b1066eaef597d63e782. 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/GBWUL2312765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b1bf4100955803c782cbaf9d3e03c9163c062dbc0e71bf00566e2fa8039ba4. 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/GBWUL2312783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8975a2c96ba3398b7f12f182fde29c6d2ecadb1890915d7d4f5633c7d01511. 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/GBWUL2312834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0275a58a3b6a2c68e1b72437b58d2f4f71f9668170cf30f40bcef7351eaae7a1. 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/GBWUL2312845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e2cf41ada2853326e8a9dcfc13f481c09da8056ce67389b9990e6ab0f7730c. 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/GX53U2026096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eab6596db08c294b808ab951d8d81f80b947f25ca17e68864ffa2187404d14b. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/GX3Q92142093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2054447c29441e1228e37f0424f05854823ead7d4dacee5a0c3553f948cd6a. 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/GX3Q92151914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b95e995d5dae955fb3ac9f18a95d0113453d79849a4e2f9c2f07216e2a6ece. 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/UKXN22157404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae748def49d322eff078f429914cbb29708c713c2325480cfb67245e9ae490b. 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/QZHZ52146933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd4504f119afce2ea3a5056e07ad2dad1a215377e71451aaf167d1f393a92ee. 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/QZWDE2432747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24aa415d3091a0d668d21393b7b7484f8caa53417949bc6d12a3dc3e7b085b44. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZWDE2432887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81960aa34c0110e3970772a6d32d0911b9f8813f7b256f254a757003ee985bd4. 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/QZWDE2432833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d97718af7f1e38c40b4e46fa3f954e39dbe39ff38c44ed663f503ebaf1ff67c. 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/QZWDE2432867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c01d16f98e623db2a816fb26539a3f3270c444d68769c7bb3e1b99246ed67d5. 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/QZWDE2432895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ceea750a1170566d580a0f6a5143c1c3a5a6e6bc7771378ac3ce4615dd78205. 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/QZWDE2432770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e25bf6f67df9813ff81f78970f25f5351138e470cd76debbf89d3aaa2dc9794. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZWDE2432790.