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 0xeeeac586d4b3854419285a780cd02ec872731977111578b1332abbc8efc3c0e2. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4632055-d305-4e0c-a35d-9ff498cb4660.json and https://artists.proofprofile.net/proofs/artist/c4632055-d305-4e0c-a35d-9ff498cb4660.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 0x266c72dc7a1f5d9c84f987458d595940339c63b65716084c9629c84d8c340203. 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/USHM22131385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ee8a43d4ecb072a96949369d6bd1b441de435be9b4f1bff006b3bb7e5deaf8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:49:49Z), 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/USHM22131386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ea57a63b0224fb4ad0ae9e909e148d85a78fe3beab97e9ab0380952709daca. 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/USHM22131390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75c1002770419f839664a9e49aaa7e62f896c023f76a8166bb6fa431f6387b6. 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/USHM22131393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803f2ecbcb80878e1276a9e5926195005b21584ceef6d37b6552b34de49ddbd4. 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/USHM22131394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb960391b4c349c17349a1ae4ebb0fb1d9122cf8d6aa54a8b7a0792252f3e488. 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/USHM22131399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de67297b153706404f304d321d5f388fd3a4ddf8aec11a2d4d938d568122ebd. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USHM22131387.
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 0x555002aa75aeae87d2974e4285e5bd241f0307a0d4b5161f7338d13e14262268. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USHM22131388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9096cf85b903bfa32245ec734c9d9cfe68a90ebe505207882a1a5d6ad7f245. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/USHM22131389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51b604b729fe55fe1e56af1072d75b0ad36cf9e8b86150920429cc95d155790. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USHM22131391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fc4da712419234dc2d164724d6c2d664d61882cc9620304a17a4cbd29082ef. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USHM22131392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622e39e2fc8e3f91516ad7a258e6a0292023c060b9b2d1d31cc4ef126740569a. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USHM22131398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8707618d160958cb087305d7bcdc23aaec185d8b3d0a40399fdfe8af2595e51f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:24:53Z), 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/USDY42156663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55f7723b1cad1213aa0431a65aa8b3734ee8543ff9ab9191209d2c588f839f8. 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/USDY42156664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58d53a3783454b4d31f6b1df5f7baaa2e8948fa67565ec5a46f23e541c6bd8b. 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/USDY42156666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0108f3aed5e5892757172495ada3587f5a9f465b518fceac9f0f82b164efedb0. 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/USDY42156668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e34e9310b38098f58858ae69411c989255a8bcdf39e39ad9a43fe5c2529da62. 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/USDY42156669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8de66c42561573ccf947f1c357ac4a5e12062637441867b014b6580fefd332. 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/USDY42156670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0241e57592347671e699ba3d25ed82394565dbb14b109c8d040914e93ca1d1a0. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USDY42156662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80368ed91fb77735243330e4f8af88fb1b468f134691769c49df8355be6e1c30. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USDY42156665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af973e4c37bcbee154ecc014396f1aa8c9ffbd83f8ab85ba49c838e32211ac9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USDY42156667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebec4fb07fa77239b8ef0d6754510ea0117e8fdae978d3897627acb2903e077. 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/ES7421501249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe976593b4188e3b8256e2091f8b80f8df910847f185635d368a00b73675a27dc. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ES7421501239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fba4e8e670c20c17f0af7bfd91c4fcb6be6a16f8625bc6505334665ae040049. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ES7421501240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa1c8fee44707cf9a052f440535d18a5016124d990898f5d26aa6eeb6480f8d. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/ES7421501241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff875185afb691e4c218555b2f47fb7a714c60ccf1cb964c160762019a2e624. 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/ES7421501247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf618ceac0fa7407316fad23b38fc3291a5e2c5fe7b2f16065031825aac4adef. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES7421501248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0548a6118ffe63be1c5f1c4857541000cc4bd1b27365094e4ae7bbe4da08bc01. 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/USHM82097187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2c40a444bc6930f68e10d5d09b784c79ed607cb16e5b45f2430b5c2402823b. 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/USHM82097188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc00b1b71af1f9dac45a3eca32d2dd2d5171c5e81b500af65c1884a9b4880e87. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USHM82097185.