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 0x38db28b668769b28b4f3c81d9cfa761056acd0a6b92b06195f1ef65df134b788. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81526f24-2900-4b63-b806-6f0e0aafad5f.json and https://artists.proofprofile.net/proofs/artist/81526f24-2900-4b63-b806-6f0e0aafad5f.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 0x56af2c3fe906a54cc6b51862c0dd4d3acc50164dce2283388be056d0ff3085e7. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/ZAC031906606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebe09415f88f2e3cac14fb555c2d7f8929d6a0b5bd5ab69407563ac4679f94c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:57:28Z), 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/ZAC031906614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd886856aaf97854118272d927fe94804c1a3d91ea5d4114de88ce267e7f5f9a7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ZAC031906588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7343bdccf00df320d3e107e75ace243986ab3265e7027c914506841662b6675. 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/ZAC031906608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fc517dd4d333e38261c8c5c39195698fed8395f81cd6ec860a55441aa0ba00. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/ZAC031906612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56af2c3fe906a54cc6b51862c0dd4d3acc50164dce2283388be056d0ff3085e7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ZAC031906606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010e07a79c878ad492e63bde37751d248e3976dc3a172eba6da959809af80e45. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ZAC031906590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e264ca3fab33d8db3413be0c349c5f1c853046ea312192d7154f6026fe4bef5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:25:05Z), 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/ZAC031906613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3807e62d1fafe7030ee89ebe97d117191ad6b7f1223ec60ab676d9a481a813e4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ZAC031906595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebe09415f88f2e3cac14fb555c2d7f8929d6a0b5bd5ab69407563ac4679f94c. 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/ZAC031906614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e12ba4ecb6df97f916bc84d00aa34c4ec46a83914cf24ff3e64721027510fbb. 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/ZAC031906600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b0fd238123e960a5a9bcf259c4c5f01ea5b442c8fe3142962f19cf1fa148f6. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/ZAC031906598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07f83b6915e7d9f349b8950cf02fa3a45127b3cd7005c90b64fe06c6e2a44be. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:47Z), 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/ZAC031906594.