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 0x6158ad1f6a817ac3acca59431c3dfe07c9817a2b133a6ce4b246521d815b1715. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e8d30c0-fa82-4cf6-b16d-b9d096879cbb.json and https://artists.proofprofile.net/proofs/artist/4e8d30c0-fa82-4cf6-b16d-b9d096879cbb.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 0x185e3908df486ded4f543bbab82e5c15c6cc80086d3588f147eba8d42cc0dc36. 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/SE5BU1864694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a7eaba29e5246dc914798eb6b302378076efb7c046b857e42ecace78a7cf3e. 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/SE5751895305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84154fa8aff60f19da2c1f9ae9bdbb8be5489c069755f6e0664281276be98712. 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/SE5BU1773166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481e84865e28abbdff9192ed9a099d8679406b3ab2a246e1f33fbb674011c031. 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/SE5BU1720962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8dc1e4d41c2d10f020375a0940c014c9d7151c4ccc486ada5dc073e5ce9ae3. 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/SE5BU1704905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1856eaf3c82f0b31cbf4ec9971951318a8f9501f201e5b358700edafa52b7cd3. 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/SEWGH2001102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2002abad3afd9030ac4ce114459c330d7f0ca9ee2d0fbd09145d524bb18a452. 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/SEWGH2001103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee59ada3045666c821514f0ec37656b06022db33f8d468e2b5f4705b854bcce2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SEWGH2001105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86646a696feac90ca28a8e555ce1c4fa6ddf9efbfed41c78c48f2d2fd4da741. 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/SEWGH2001107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9ca79f3422ccb0fc447eb6efcd76ecdcb7b084162ef82bd3fe6fed89d6d310. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SEWGH2001108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f30c809defddea5f8ab1f59c0ffb936232bc6bef8fd485b6ce8e132a1b269a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:46:53Z), 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/SE6XX2514647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dc4b61995175dcc4ab4c20fc2e1648d73cf20b9d38ad71fa52bb8ed402d4f0. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:53:30Z), 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/SE6XX2514650.