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 0xd1a6b215d121783358517a9b061152f339e4796976bdf92f3c101b9c7aae8ddf. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8edaf9c-5d02-4940-9f0a-816ac6d65b20.json and https://artists.proofprofile.net/proofs/artist/c8edaf9c-5d02-4940-9f0a-816ac6d65b20.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 0xd7cc037582c9a0df0da86bbdd332a7a80cc0b398c0b64d6df9798e58ae05af39. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:27:17Z), 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/NLB039500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352313297c1d12d08d820cc69d41cbf4f57a2904f09534958558ee335844fc60. 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/NLB039500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0c96b242bb80212f83ce21975293a1f55773b4c7bd8e5d116b5ac51299d031. 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/NLB039500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b95df36c73d5d05801114c137a67edb3de136538303296b0df2f992e4d788e0. 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/NLB039500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f65b345ee3ab12501665e606d9af9fc602f02d4133b2b9ca2035ae7d56848c2. 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/NLB039500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ef423fe66f891f25c0c10905f43412b36e32c9b82f9d6a156f192367ad1334. 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/NLB039500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412144bbf105da90ce9254c9f3c913d5c1ba2deb016f8f71fd9ee54ee0f1933e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NLB039500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147862498443369ff38b8bf159e01e691751251bda8bf25341216a606f5e21d7. 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/NLB039500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6843dbd7e944a6ab9a67f17aa195cf7c0c7a96375e9c9e1b724cf58807c59273. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLB039500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbe941a141208f4542e7bae3a71e46d23399ce19cbd643bfc8fa5a9d0fdf259. 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/NLB039500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414f11d66de461bfc07f159f856ef9d23e881707ff16f5796adf4179759bc548. 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/NLB039500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e1858cb517e20e86cead7d46315e14a809637f49f79191a14a8cd769ab44ec. 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/NLB039500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ad8371b13eea6cc1eb9a95c884fc787d5fb16d41f370246fb35007043ec8f2. 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/NLB039500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e1c18e846dfe74df6a036e7d78e0b8957d11220badf6c18ee57aaefcd9e2a0. 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/NLB039500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bc83e2c73c7daed41a5c4aa59f914023137475eaa3913424a0205d9edca3ac. 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/NLB031600262.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d11f58195babb1e5ba9aaae1d6295aec85952705e23f5056b83abfa650144c2. 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/NLB039900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5b4aad0fa958ee2f2725d395123496e50b642e6d3ecc6117ffbddba827ecff. 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/NLB039900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d077ec4c516db9f7960c034f16ccc2506589dbaab5dcdc39ab45b3bb1224f0. 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/NLB030000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6021a7add5a843dd6c2228b3adb8530176f3fca4883f4ec4c6721befcb381580. 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/NLB030902028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef0a7f305b6855d242743ba24cef1936f826c0154ad814dd0bace4424d06854. 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/NLB030902170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cc037582c9a0df0da86bbdd332a7a80cc0b398c0b64d6df9798e58ae05af39. 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/NLB039500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db1352ba14aeccab08f3ac08b04c058138cc2115868b814ba3fda795a30222d. 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/NLB030900834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b29186c16f2fb270f03ce054b3ecfb8491e3407df871adbd09330862bf423c. 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/NLB031000274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0c96b242bb80212f83ce21975293a1f55773b4c7bd8e5d116b5ac51299d031. 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/NLB039500028.