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 0xa427032a8e8026cccff755e1c8addd2bde3c7eabcd50335242cfcf4984b03679. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c189886-653a-495a-a248-5da423411838.json and https://artists.proofprofile.net/proofs/artist/5c189886-653a-495a-a248-5da423411838.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 0x39a79a2f61a7248c8a9d07f0ee9162de8f69ecd2d94f87e9eb45ca64dfbfe162. 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/QZTB92369011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24229a0c980e56d377fe572d52cf1bfe991f77f81bdde8ed7f55c70ca30a676. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZTB92369010.
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 0xc7a3b2871728592e38eb697566a3817d22b074f7dc3d5b9669aa10824498d1b8. 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/QZTB92369013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f391e12a6f912287a6816a9463ebb8a19aa5dc6bfc2bc098989d8810dc998b. 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/QZTB92369018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29a2dff129353450ffc9fb16edba8833017c9cf419f5a9cd0259ac3ae0d13fe. 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/QZWFH2491016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5c50f4e53077d49875593930d7da6e9ccd0def57a41102748ec0754b3f5ecd. 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/QZWFL2349084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d7f37b5f1ffe94039e461ed5406fd30fc2cadfdb320d4878abf2cfe131170f. 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/QZTB82385582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0759b479e42831a98bcbc0af30fc9c7c0adb734a3223fbc407cc765c9adf257. 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/QZTB22336913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c2da5a50ec4de22c6feaabf6f4fe72903b1699c733f2c29137f354ea3f21f0. 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/QZTAY2306373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543bc5b8b10ac07d6b978bc85ca4c9ac050b8b48fd07ff86ea4bec96cc9d63f5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWW2313638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545101d9a6fc876b3f6999734af333faad82a0a7b2fd61d6b4b61f1529140db6. 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/QZDA72380734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8b865467f02c830fd41739ac45803a148404085e091c370d096bb6a6661f9e. 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/QZDA42387111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3143c34926d8053044997331cd4a4e8b7f73d2aced3f12995e7aab25d6de9e3. 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/QZFYY2306156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe042107e46bbff78bb14a411533f79de53b1dbb5884c16ae04c919ac26af5c9c. 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/QZHN81991945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588cc37bd92a688a3fe451a88257937bd96282202d7c8737788980d67f48ed65. 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/QZHN41990009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a670b004cbcab050ede8bf3e5b037057138ffe7647c2fc90a92e52cf9da875. 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/QZFZ61992976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c74238a1eb1c207763216f7726df06082df6d4850406c56e0cd6abe49f2fe7. 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/QZFYW1917638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558b8dde8f22e1814ea40049e7af82ce850680e4d2fb68f9c7747155adc254d0. 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/QZ4JJ1925754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a6bf7bf1c87b3d5a3dabab95fa7386565e1b071d7bd203347a9befb5648a20. 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/QZDA81805009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb252e524b4ec887f3447153e73d9e22a0003b70e41138f318845d1dbf86aa4d. 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/QZDA61836669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c15c81bfc5332ebb8b20d9ec8521891febcfe07b82e74ea0e851fbf2e3b2d23. 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/QZBRF1898078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c86bc530a4793cce2386e7affb8eb40b4c41be79b1e6d86a755ca91ff8a99f. 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/QZ9Y21782291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82a2a49e5f3f0b05516cc7e2584ddf2123a16824d5695e203e4cdcebbb30f08. 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/QZ8LD1764144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1e9fdd529f78f1ff60cd026ceb8e731fe437058707d0af89065e313a129fcb. 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/UST8K1751201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88936b1755b27a7d901d8894b0ba4642dd318219ef562001b70eade745cc6ea4. 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/UST8K1745234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04aa441ca9f07fbf02affc88c045866d80162571f747c4372d4b2cf36b7fcb8. 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/QZTBD2316119.