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 0x6782a012bad30f18fa73af109ac856ef1f4d80454710e38c2d31dcbc8adba2ca. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29bdcdd1-9535-4d9f-93b6-2a2ab1f1e892.json and https://artists.proofprofile.net/proofs/artist/29bdcdd1-9535-4d9f-93b6-2a2ab1f1e892.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 0x726f8a3e80094d079ff58822269d496c0748adb6deb04b813a4d0d446bf1a9ee. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USWR38500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91090ee1cfd9a572e8a9f0952d473d490a800d3d0097e3aac95ee46b39f688a. 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/USWR38500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab31db56e98c074400ee6448862c7896bd7d65a83564b4c2c51ee5713c591b9. 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/USWR38500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32969b06fe3157539c86c71041e8f76c2d8af419200d92ecc9dde4d355123073. 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/USWR38500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15574ffb79c6109b38442107c51b86745afe36933c1602a23446ac819a75960c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USWR38500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92de7861de9c90ab7ad8dfb354057d375b58d69b245408b9233be71beb276a8. 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/USWR38500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb390c7933e8f02527ff8cb56af52935b289497a86730b3bec5e8b35f83178f. 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/USWR38500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369273de0a685b1bd73bf442a598cb95114c619930e049eef7a34e09056ea056. 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/USWR38500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b59a1423d016070244aa0204403a7f9b66333385acaffbf60a0618dc0663652. 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/USWR38500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabc1a4417a47707d736b024835582dd2a721838a2a7edcc52877793feb87234. 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/USWR38500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c1920d6d1940eb053ec28b752cf70d3f97af1bbb2858a024a140c459a03506. 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/USWR38500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d21823756e63561f92c1c3c0395b5300ac3b359b5279dd1cb16ce6034dd2c0. 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/USWR38500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9871354082419db1f97f24c57208b685284bb6aa7ecaa65da4460d8dbbe77ba0. 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/USWR38500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7f0a841993fb2015f5db7751c9b674d4d408f2967d845b704d26a98ed9b4d0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USWR38500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a964c60215c9d129f276f44c732a639aee86b2b9a98180035aba14325c98a07. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USWR38500058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f238b57026cb1c30fa013d792fd23ef63f86213e43c1237e9c6ee12db6b71e. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USWR38500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01daceb8ead8538720402c9e7391773a42080a24df80a03a3afe6d15b198dd1d. 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/USWR38500061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268da365153d44ac06d9805050826a947f5d3d986460cceb5adf3dcf64b94baa. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USWR38500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9a9f06be05aad19df2fdd38aefb8ac6c547976b05ca6da68176c231e538cfd. 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/USWR38500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8fb8966c005f497a6870be76864041245be4e1f33863b610ee53182883cf01. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USWR38500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48b1e1f168c0fd47d583405a375feeedbac0b30e28e8d5038d49b9928369b3b. 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/USWR38500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5feb4fdcd83c53383bb12c78a46acbbbe38edc99762b90899f6deb12c17abc35. 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/USWR38500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cf690b42443347f202cf7e3f299c72f444904ecde5c8b25c852ec71a2a8c01. 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/USWR38500068.