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 0x3c04eb8c2dc20ef7876fb9cf3f09f2ff5145b00b6e32194534a27d6d355244bb. 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/bd5dd1b7-9cd2-4f5f-a419-e6a2c5038ce2.json and https://artists.proofprofile.net/proofs/artist/bd5dd1b7-9cd2-4f5f-a419-e6a2c5038ce2.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 0xe803111f328a73bd88707287349ad5a4be7df405909ce8193477c9dcddc4f739. 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/GX3HH2123971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa341867358490da659d7a6a7e55428fa92998cf78e662f420355b536fbf9c2. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:35:40Z), 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/GBMSU0010298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8060cd82dccaff5e3c31af0906df3e3954f343c335424c91dfc1c115c7375aa3. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:50:51Z), 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/GBSMU0084158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02d4390fc82058bb22a3aa8d65234ad1af7a821e4f0a0d1570f6985edfe37f7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:31Z), 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/GX5MX2147039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f9188748985e0604633b143f122f9952ce1c9fe6e841a9addf5f47301a3ebc. 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/CH6542210446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780fc0071bfcb85f77abc73b2e3493056171f14903ef81854d97db3cf5541f8d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CH6542238128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd682d1f12f8788ec07b413e61f00e024a75f1b348b4846ef9ed9cc1b4e092030. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:16:11Z), 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/QM3DF2203799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d62185c4ed6aba35c469ba744451f1ad60bfe9c6e9f826ad155dd26acc84b10. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM3DF2280692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba30f40d263f992b9c085ea9a98b91e04c7c045a7579bda12c2f59f58424ed62. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QT4K52547131.