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 0x56dc684bbde63322dfffb17bafbeb9f475b660640ab4f291978c351ba215d4c1. 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/d3134ea0-25aa-46ab-994e-2fa86871ae83.json and https://artists.proofprofile.net/proofs/artist/d3134ea0-25aa-46ab-994e-2fa86871ae83.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 0x292a7245382e9517d40e858d1149e5bdea2c7cd824ee1078ff9d1c83fc3e5ca2. 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/DGA0H2306516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a69dce321e3bca77fc5e6605384533b767a56214893dd430a045eeea9037cf3. 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/DGA0P2318900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4255ca14b37d43c64dd64c04ee0043c48108c8469f4cb4d4c2584a9c8debeb13. 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/DGA0P2318901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b7db751cdee4db5acd10a065e9b3b0f4b677a35ca569bd28ba6eff36cbe2dc. 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/DGA0P2318902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d62d678fc6622b8a196030eba3cc29646ec63563cd5f5f1117866c01be2c8a9. 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/DGA0P2318903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9092a94a9b84c768a70e221e6ab9b1a6a1cb6057ddcc8a0f0b990c86db140670. 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/DGA0P2318904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59cafae8c6185388cd7c62548865cbdf894fe191ddf7fa61430d29155bafd5f. 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/DGA0P2318905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a1bcf20a20ef74f92dd77d5a1d0a7ad41bc6c7e6eeb8a20b0f7f50fd149a61. 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/DGA0P2318906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580f8e8b5c1411903c718bcaf897e08a7a709be03466f0148520851c01dc9b69. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FRX762427803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc9014935a44b18d3891ef652caa00368fa6da7689909e9a19be6d2873f22cb. 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/FR96X2449755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1fd6d2fa4bcd3d42e67b8b228b17d8e4a71a5c01c1c236ebd95646654219c6. 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/DGA072337737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd526e3f10517947542366aac5f304f39f7e76949eb7d0ba46565257fd66e5d. 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/INS182300290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928df57fbe36c96a7e9a3a9bcc26fb72db764207a36a4a51b809be9dcb778fe5. 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/INC622215462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c3682cf751d624e9ef6b9018b1287e5671ac3ebd1d600562ae491dbd20f72a. 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/FR10S2438594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ad5ed02957b8bdedd1831bb83de68758e23b12bd0b6b1b90a925961cd591af. 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/DGA092336880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac2c3de3be59d36f2d014b56c95e0cd9c55207b03c2834678aa56bec77b0a73. 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/FRX282397742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802b9c872383822cf6a3c3856ad47fd6fde271638799cef835db51354ffe8633. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/INS182300386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f0ed63447c7273cbcb3320d568c4835cbcedb31369a28b60f63d0c55193480. 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/FR2X42381581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34ba52a10e180e35b6498d1e15280987f63672b4e03eee89af2fe6f3476a102. 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/GBMA22046718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2459740a9314a691e12269ba68c827f719cb3b8eab9e224b88921a040ae8f57. 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/INB942100575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc00a8a6d85eb4306a7a67237461d564c3a17b529689c62b7c3d910dfd8ae61. 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/GBMA22048948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39d38dd07b74d7d0e3d49436ae9b9f1337a6488a976a69294c0119f40e01a3d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FRX202299777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6011d57e203256eae0960fc619e970b33fdfce6a33935f37f6571d85d1218883. 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/GBMA22048433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392229303d0b1b9025232d029df1a65b7387da6845bc187644f99604d99b27ea. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/INJ221903511.