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 0xffd137a7d58c1855829f2bdf13697882defa48a2e037822002d2a6752f3954e1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04b0bd58-666d-408b-b464-fc1a2233cd98.json and https://artists.proofprofile.net/proofs/artist/04b0bd58-666d-408b-b464-fc1a2233cd98.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 0x3f69755d58132e6b88c6c8364c4b5e2a3b3d3cadfb54769153c0f7c03b566071. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCABC1190929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818de0ba9cd3e4af7c6680c048fca1a0f65887f17c66739f02189155c6902688. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCABC1190936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23242a61f3551638fd62a7150908b105ff85092d22e448a15ed95da1d8e5d301. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCABC1190940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc23e379c026a875421836af01b20d9df10e2b60a12d2e2b24f91021f55930c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCABC1190942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6a4c4ef1fae581f8394d19b7bc740354089f5493ae9941e8b7cd4b0122beec. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:53:38Z), 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/TCABC1190943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012f73c8542cb1a410758e6266d98271fb50a0740c1f8e22f5c82c3b7fddff4b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCABC1190946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19e783a0c72148e980128cbd72be0e0b8d62dd4323ed8fd89a830048539f305. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCABC1190947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0cb3b510dedcad5b31bff276956c45fbf48b3940f230b07c032602935081a3. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/TCABC1190948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857df804cd557cdb770aff87d5f649e14cbad1f3c1ed7c7bdba06ce8aec30cbe. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:03:17Z), 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/TCABC1190957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8a0ef7c0c9a1e15bb6b918f27d57f488c57b33910e82f788d92387617123a8. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/TCABC1190966.