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 0x44db0e5137812182845190d4d7df188017f5dc56da2112985fd3aa66f18bc9ec. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffbfb750-467f-4cc7-b714-857c6233ba03.json and https://artists.proofprofile.net/proofs/artist/ffbfb750-467f-4cc7-b714-857c6233ba03.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 0x2a2899c3d487e3abd8f3b89366027b01e5b867475a8af8cde295ddc86a84a231. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FI9PF1800217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad46a96bbf19a2e9e3ab9bf68645931f7bb561fed064d301adc4201a8980de6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:09:36Z), 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/FI9PF2000224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ceeb3da7ab72c41494f29b5337f9a867608d9b9f748763a8d8735a318c295c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FIHSG2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37892b57c19212820c4b68df9083ab75dd4928446830a944d72f996077278dba. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:59:29Z), 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/FIHSG2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a10c5c7d5ea6082c4c24bf8e0ea855ae2c59ada0f65ba832e264a6428375a90. 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/FIHSG2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ab4df56c6202ba12bdd3d7c04ea477c3d219bb14cba5af9fbc21fde4a6319b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FIHSG2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea25f6982afc7d2f1bfd82e5902d7b2fa372da0c40024653313673608a67db4e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FIHSG2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae645f1ff441092ce85a80ad914d054b500484c15999a4b6754e33049f7fc6a8. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:56:00Z), 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/FIHSG2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3474d3ca431ae5367aa8c5a0ff4c571b2b4cef0ddd38b1147188e2808ea2eca. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FIHSG2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ecb4998036d96d0269a6fc7121724024d4c53a8024d28079d8ac9623a086ce. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:03:45Z), 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/FIHSG2400008.