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 0x89a4ccb635f198091ba9ef13b261986c484abd25ab6a83454fbf5614092ca2f1. 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/31c598e0-058d-4fd3-b1ca-9451b6707108.json and https://artists.proofprofile.net/proofs/artist/31c598e0-058d-4fd3-b1ca-9451b6707108.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 0x290efead0c264ce50b09928e7dc43b9aec95ad740692375e22d3be6c356f87e6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TWA451908202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf51f084cc18ff21ce39321f5f39ac309eeb161f3006dbf0405ce5eb22cd407. 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/TWA451908204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14f696a7215e082bc8860987d5c094f0151e967c661fdd89b7017218675fa1b. 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/TWA451908205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e674835a3849eb1b06bdc22cc665fb7bc5d85d26821b68d086247fcb055344. 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/TWA451908203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2e919cbddaf3f9699db0f208d0f8da43237fa50328bd8dc5bbcf666e9a5e8a. 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/TWA451908206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a87d95134ddb890628c889519474a71db094919b3f2cfa37cb037d9a83a250. 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/TWA451908209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8352e0fc6011fce176ecb1e0a7a64b94772b022303ae4d9182172f5a4abe02. 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/TWA451500501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255f1bfe6da0c2abac9afe4c542e2ee703dd1f7e5375e302e3b024a609d1582d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWA451500502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589e355040b81d15476763fb79fba3e04cf3b75e6d93f35e6ead05a356bf898d. 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/TWA451500506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e08d922f49cb5bc134f84fd00f97601ee95e5213872e57d3ccd10468dbe0e0. 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/TWA451500505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a2da542ba2365c7c979401a5d95edb3c2ce85b40b6a1cc5e5ce2b30615ffb6. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/TWA451500509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b88c367a2a12be9d2c5b7196b8c6e12190831bd714abd088d5f7f015acf3a2d. 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/TWA451499204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936184664e20332fe53d68c38939d28bbb39226f14f65396e76ab88ae057478f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TWA451499209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df214f8cddd11404118fcd2d70c19aa35ec73d7bbbd2b4ca24d36d2ff07210f. 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/TWA451499202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103c9eec75d48327cc44afe70e8138a2be05cc0921cbcc4f6356f9b8b7449f02. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TWA451499205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7452d2cb13f39c3c21725bcf989b3fd4625c15d6a5c64df0554526aebb2288. Chain 2 (Bitcoin): anchored in block 957253 (2026-07-09T03:08:40Z), 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/TWO371111002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bb3c7ee605a365aa38e5177a02c17169f759ab96f647563f7be2cad1706a70. 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/TWO371111007.