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 0x96c61a168430f4841b4dbb67d75c95eb8a3acc484f1b07a4d53a2b02d5a7a57d. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98210af8-f9dc-4041-a55b-d75da402a2c8.json and https://artists.proofprofile.net/proofs/artist/98210af8-f9dc-4041-a55b-d75da402a2c8.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 0x1ee8dd8534e17804167cadf121f57cefa94d29db6eab66427939025d4ea042b1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GXD7V2311092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682bfedb7fb39eb8c901d9a40f268afd5cd57006f6f5be5c4afb227473a0c976. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXD7V2359080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feadd8d9130c79677a7d0310e8e1b4b621ac28b52f0373da63e88e20f2d0bcb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXBAV2291013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ce967410243c927c6348f67aca0ab48f7ccd66bb71dc0ebab56caa0883249a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GXD7V2252985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8380d5583467859c548453c576f2405e19bb7af26eff2ef492645089c60041. 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/GXD7V2274100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd94acbc48843310c4661eac535afdc2f69ce603ece27a3dbd39bac23afca692. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXD7V2292112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490a6819f652b14d2ed383e15b12fc82032e0fed09d85ef9463da9df65eb9c4e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:26:21Z), 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/GXD7V2285620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9c20ba2ec9af7f31e26cb57748c1a7539166e941eddd0a9613a1f7e75b97aa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXD7V2233422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4183e656530c9b2ce84c59ad8f47376dbc5124642f403566b156e3ef840e8948. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:26:41Z), 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/GXD7V2223732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff887d32c98732cd893f5cbfd1c9d04a0f0451448b413e8b05cc21494575c09. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GXD7V2427187.