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 0x1a86260550f3bb5a1eb2fcafd66a157b93ce75e4c70b96e769704262194e8290. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67e786df-1eac-4153-b909-ffc8f61f1e9d.json and https://artists.proofprofile.net/proofs/artist/67e786df-1eac-4153-b909-ffc8f61f1e9d.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 0x80db6a55f2f402511fd71f03c93c89e469a737243d3bf532f0ec31ef5df8742a. 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/GB64T1705804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344a7618d82a4ac9f63ebfc8483410854f4a89df6f53bc1ece510c22bdec445a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GB64T1705808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4969ccdad48ac1556fac0e3cec2c1133e08d9207f5c4affa8eeb5d904387e9. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:07:08Z), 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/FR2X41903642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaab48d3ef2518941f522028d8af612f55ae2ce9bc58aba0f8ba2853a58990d3. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FR2X41903645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474f0b1c1fdc7dc5d4892666ed70e70756ac74db2b9945cf1ca3cf8b7de23476. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/FR2X41903649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed38f80380179dc9e3aa6d3f703857fa457cf54f443ba55927924778ec7ce6b. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/FR59R2105920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd978a08ee0ec369357c3c4342a89b720b13ffc52872b539109ce4d35c73327ba. 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/FR59R2105918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d1d0bcf73743172e043b3bbf88adf6744d2a20002c1d9a8643dee4de14e23e. 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/USA2B2104062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871e6a7954be771db19f8b153edfe7e318f72ff846fb8ca849c2a2edd567cd6d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:49:31Z), 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/USA2B2104501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d1d0bcf73743172e043b3bbf88adf6744d2a20002c1d9a8643dee4de14e23e. 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/USA2B2104062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51424fe96b2a3d8385a2783d4370b8de03ac81d3c16f001cba075317aa81421. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/FR96X2416077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51424fe96b2a3d8385a2783d4370b8de03ac81d3c16f001cba075317aa81421. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FR96X2416077.