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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 0x5bc0784ef975f2ac774b6e122cb06bc32bfc06b9d79cf900323c7ede91973ec7. 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/d57a7cdd-0db4-4aeb-b259-fa57c42ceea1.json and https://artists.proofprofile.net/proofs/artist/d57a7cdd-0db4-4aeb-b259-fa57c42ceea1.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 0x8a1ae4768755d03a40019fc18dd58536c6f8b01c3ad73204cfc172e98c467a0b. 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/USRHR0922202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5ae53b42203cfcb85404dc6996077107a7620c61d1d94d3bb42a40ca567e38. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USRHR1224702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f09b1ff793b8a9413823b4092a9b86bcb0c794ebbc52bbb5c1f6e22b7ccb1cf. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/USRHR1224703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff49adc5439e8a79518d2bdd8c0ce9938553bcf9d057005b0aff284c43e62bac. 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/USRHR1224706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45702f10f387b51cf8412205922b6116cb20a9146c9cd5991a54606f7d2877e9. 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/USRHR1224707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d74c6cc8a13dc463595d01e46b3e9d58d4fad83377d89fb6b5ac89678ba8b24. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:29:28Z), 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/USRHR1529102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799c9149f4aef6fcb14c98cde3676f74c6c25d4ab3a2b98cdbccf20031756c19. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USRHR1529104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3973c76d7c5751bda90bb403dd9a99013d423bb47ff578c37f61cb42eab0d3e8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USRHR1529107.