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 0x043a7b6b22da82f3698ed81cbc8611aa41403140315df41a4f1e48c1031ca45f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75398f17-8467-4dbf-a5ac-9a2caf07166e.json and https://artists.proofprofile.net/proofs/artist/75398f17-8467-4dbf-a5ac-9a2caf07166e.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 0xdf610c7181eedc3d80aed20f583056c758a3849cbe4c83c5a3dde0c10ed714b2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:29Z), 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/GX3Q92594698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7959d9f767902ac64c0f90a092f94fa426aee5817816025eb0695cadee3061dc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX3Q92594699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee3d90178e73bc433db35e2a7a1cd65e69a64afa8417a6e77310590d79e7c62. 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/GX3Q92594700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c2370bc80f1e0edfcf5b8ff5ad8e2402830244d8058ea124384cc2ecd39e6a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX3Q92594701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294234d1d8bca558b30a2b6e6d6aaa7d65c1f7045dd3a8a0d54136cfd05410f5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:16:49Z), 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/GX3Q92594702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ad406b849b78bffd8623e13dd39ef4a061cd0607d9bb815584ef127c48122d. 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/GX3Q92594703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8feb3043185cebae247133af4c71f4a347a83183f9533345dd3be45771a4685b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX3Q92594704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49339ba4c7446d20cab60ed62b5dcd3cecc1dd9b67dacabf919e7670e3b83495. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GX3Q92594706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef8bf0ebbaa7fcf52342d7de79440db1eceaa51cc9bf19daf1a97856cfc0f02. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX3Q92594708.