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 0xf31ceb8a99f5eb1a4a9dff30ed1a9a259ca3287229757ba6140b0818a9e39003. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69b58430-4b01-465f-b0ce-e386a4d6260c.json and https://artists.proofprofile.net/proofs/artist/69b58430-4b01-465f-b0ce-e386a4d6260c.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 0x2786c05583a22444c5a5b2519983a9700cfcae3ac569f4d961ba9ea24cca8dff. 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/USLZJ1572379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cbfc83a3cffd3fd9dd20641263ee32b6cb574de1fe1fdafe763d1b3604b4ce. 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/USLZJ1572383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb184a1df3964e05401b4c57146b146e06db7cd535eb92787849433baacbdc01d. 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/USLZJ1572384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a28125898cd1b4dfc3dbf8c759c702475973f539993fc3873f53df23a690ef. 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/USLZJ1572388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e4f99c35f3a7a4119187e14bd149e4fb0bf47ad7bb61a8b1ec2f0449f3f69c. 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/USLZJ1572381.
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 0xaa24765a9d6a01aba92e4be593acf9e52024f677b960b242f37da3128e6ecb18. 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/USLZJ1556000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bcffdb6ebb6f2566b443bf1748bdd8829377b696efd096e99e0798bc8d2313. 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/USLZJ1556013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3302981eb9687ae0e17734028809045384cf0c26aa489fc851deeabc9e101a. 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/USLZJ1556015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff605202e2218620844d9d17a97524b77b183ed50be8c2f8784325fe10a13404. 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/USLZJ1556023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbcbdd0cf1a5615f13857257a9eee85a027c914b5449cee9c13f568ca9045b1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USLZJ1556004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058484342c5f396152c56a646746cc2253db04f031a03179abb8bade21ec9222. 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/USLZJ1556012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab8b99e962cdf31b179d49e3764ef48ea7c6365557f48121856f1f664085c4d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USLZJ1556019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e69c0ba7b4b19b1c3da3a358bffe4007d4609b0c36f3fe761f40e52faf303f7. 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/QM6N21850637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b22b7d6a1c927ad986caab5773ff52a76796be327ef0d3746a1034e7799eb9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:15:15Z), 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/QM6N21850639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76785cd91e77b3e24413862376fac1f65079712c5ec7b988334ded8de64344b. 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/QM6N21850644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8a5e79e94f4c599f31381c7d150831170e7609332dcf0b7325f9b75b6d1dfc. 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/QM6N21850636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4489d961b1a6c32edaae5ff91ecc36c8e8df2b9434e7909cea650f7bf2f4a48. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QM6N21850645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6489e41d85f36300bb14308832eed3b0fdddf79cb1fa21e175d48b43a20f72. 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/QM6N21848411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2737d0480fd2178d889f68375ff67795e82c8f612c8b31738c1b13cb206b7a2c. 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/QM6N21848413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3313cf2b18fdb1f8e129fa41ff1af1713508f39306a6514ab3ddac9c939015. 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/QM6N21848405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a983e0d9648dd52afc1feef4666525138fbe496d05289c33c8b7e6c10092859. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QM6N21848407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27fc8f914c37679180d2ae9c484a401819e2f8116a04e22b2d199625f87e65f. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QM6N21848412.