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 0x17ff3911ee7190dc69e6fdd2cec9083652623a69f3b1fa97b6a321d2d26b35b3. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/338956b8-7009-4122-9a7c-7a59b44ff10a.json and https://artists.proofprofile.net/proofs/artist/338956b8-7009-4122-9a7c-7a59b44ff10a.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 0x37849df7686ec2c3254ed92068c5e9a4151fe9a35f6cdc348392105d4a309ed1. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:59:04Z), 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/DEZB52460027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc8e221fc93fef592be388a7e3f03c98bb3a5909a937747923ef61703c6a942. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEZB52460061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca5db0d80c84a296fcea82220dec61362c1b5e68ca1c7e4ec4592164f1cf1ac. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEZB52460062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33548332cf61b0cfd5d5f543edaecf70bbafac2e893fb2489372f0ea266d024f. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/DEZB52460063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67422d69861957d1724420730c2e0a5e60c227f8d8d4b1d515fbb61d37924f54. 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/DEZB52460064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcb13af5f9dfa33d07f42ebaf4df7e338c82df85fce65cbdf1338e39032ec16. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEZB52460065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6063348f6a6fe39ea455b52757446442f16eaa3fb88dc5cfd7b8aed2385f16. 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/DEZB52460111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08769e53493d1d2fef74097ed0ffd62220ad31d1e513e9b65740babea77d5360. 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/DEZB52460112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2ae604fb8195f0bda3255e14fbf86d0ffd592cee152e4a4bf5fc622353efc4. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DEZB52460113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0093541cdaa83b1bb65cde9d3a123c1ee0eff791a758690c02df5f9ff8b3cbf6. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DEZB52460114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f63822c7eba6725e36f706d6e3702fcd2399f3ee3eecf6d9704ce10b65f2c56. 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/DEZB52460115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8fff76ba2f4b6bdbb9ea4fe9cda7848b06e7890f433bd6040a918b69aa9fcc. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEZB52460148.