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 0x9714c4a4bdbdc0a83013af28126c663fdeddc5346bb2546afbbe139fa0a30a7d. 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/71a74d81-1354-4b86-b43e-49e78d430710.json and https://artists.proofprofile.net/proofs/artist/71a74d81-1354-4b86-b43e-49e78d430710.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 0x74d228eac6b60e65d26d1821c9f534fb609d300e529ac945c48aa1a2dc6a445a. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:32:46Z), 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/QZGWW1978714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08636f7cfddc3b21b4d710fa1a38ba54129c7bdfa1b3698821511c716fd85080. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USA2P2011834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14f12d2d9c20e3c57178ffc5ed0b0d826abe5f6e916f6d021dde66c04f28956. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USA2P2203725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adc268d43a145deda40e8db7f453716ca3374adfa6e83dd1705b43f8f3e73cd. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZPJ32263022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c27b1555f906c9bf126005e9f2884afa3f852df81d167c0a9a05ec88afad285. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZPJ32349884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8170f18d788050edd5a6a0334d9697c752edbb6d1900cb2350a07672d4b7bafb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:58:03Z), 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/QZPJ32370545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcded449a4e1e5ac3cc3c4842f4f59f20c60bd4b5b6e8dd4c6ef076bad23c8364. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DGA062416194.