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 0x89f12a6988f82f8f4bbda6856e1ed4612c17435d1db2b38daca20967e008af1b. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f512d18f-a9f8-4f27-baaa-86b719f12e54.json and https://artists.proofprofile.net/proofs/artist/f512d18f-a9f8-4f27-baaa-86b719f12e54.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xf0add96db79882d8a53bc2c5d70d5860b7d7faec8bf0735ae7e027d318ece15e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US3DF1985006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0363d8b22fbeecb005496eb8943bb10b3e0cd5cd243069d91a90ca6922af12f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QM3DF2153152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389954ab01c4ba357da6de3ff97f696942d74dc87def458e29fdc6fb5a514fba. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/US3DF2296572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91eaff1551a7381bd2418a6d02fc553aaabf4c153549cc05dea7e5bdb001b2e8. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:04:51Z), 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/USANG2263036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dbc0566f1e5cf84af062d2a580bff102860773bb4d7029cf1a0b08c5a3821d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:41:43Z), 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/QMANG2232103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473de43f0c351e6681325569a434cebac4b72242548ef5e617f8a8834a48e32b. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/US3DF2476229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9f1454ed32720b3ee6b274861a036698fea1d03024259a0112f4f76f089616. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3DF2476230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0b30dd4af7c707a748ee013ef159bf8cc77f4356272fddb392a1476c5d2bee. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF2476231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586d756fd6918d6d1f00f1a74ad0db72534e14cf4ac003ca495b294e88e59a36. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/US3DF2476233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6a2e7f36b0a5dbab6c14e9710b2e6f88e403073bdc8950eb2dd0944e5b3b51. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USANG2490074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7ab99737d36a22b9f1cbd9fd88981102bf6a0b6b78d2fb0da8278edb6a6b3f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:00:22Z), 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/USANG2490077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06da6a6452b2fd91fe5535f194b11f4cef5fa52f41ee35eae6a1ecac4897c06d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:00:25Z), 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/QM3DF2418185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88a885de38c7505c8d90e430b6b1cbd8c5be6a112358bceff7148e90668d78d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US3DF2504563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d9a3959afcecb796ec1aa71e4302283e36da07d760ff70f7e22319d595a9d6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3DF2510921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3482938c89759f3aaf7560c4470277655e3c59682185dc81339ba8e72da8f4e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US3DF2510922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9eac0e1aaf1feb3cbcf01f583f809268ac313544a17d35269608367233782e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US3DF2510923.