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 0x4e1d8ba147306d193357b68b257ea2fea808c144c63faa1488de02a428cdb076. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df016cf6-f460-4c4e-8966-0e975504c1a5.json and https://artists.proofprofile.net/proofs/artist/df016cf6-f460-4c4e-8966-0e975504c1a5.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 0x8a946f858214b4dce11b105d658ff87422114db7aeab73957b9cea7fbee9bb48. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCACM1667117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241d03cfb76ad29c986ee609abe8fd5de7560c6beb8ca9358c09dba8714b56ea. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:50:43Z), 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/TCACM1667119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb85238cca1db1424c1c42b15f7e50087e8c8158453f778d1709c4dd6c3d163. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACM1667121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cd15f3ead7fd514fa5894a1a97fa9bccdd21b5eee7fc921680b8169d8057a6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACM1667122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378d2d8f088e3f4981cdd54361c3d43b913b89ebd7f50d0152fd11883081a786. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACM1667123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35ff64ffa214d84dc5e2c457fcdd6ebabde3392dd782e667e2a2d0fb1f45d31. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:31:11Z), 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/QZDA61879571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fed5a0bdba06d57ed5aeb2e4cd4ef73cb2f75d3e0f801f3af6b35a38735535. 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/QZES61838797.