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 0xb5404862b231fa5859b63115b7b38f9d86e4f3769f4ac2aa43cf61175dec379e. 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/0f859b46-a99f-4221-b145-0dcba7267b71.json and https://artists.proofprofile.net/proofs/artist/0f859b46-a99f-4221-b145-0dcba7267b71.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 0x32220139058a677884a56b3bf047c104dbadcd57200a44ed8caef2c52ac5f569. Chain 2 (Bitcoin): anchored in block 957839 (2026-07-13T10:06:30Z), 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/INL492200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfdfcc9aca70ce966312d0a78f001c9be252b73a552344e5a970f2d4fb500d3. 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/INL492301005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8671aeb79422574927de8c9726a3d0b364b0d734c0f8c8efae8c1b8609cf42. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/INL492301113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9493b61f3f072ad4cbede5894c2d2d529bee16eeacf1a9bab0c2515257db8338. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:37:51Z), 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/INL492301125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aac611ad4be8ec927e5c600d487af39d450965fbbdb1b3bf457c2d84ae0dd2e. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/INL492400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372771f3a8307ac52122048b88ca4d0124dbf0572a65c04a9f15163cec657ab2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/INL492400726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b59fbb35c83c3eccd3ff38898f82dd249fd466a5a9887033ab9226aef7bc8e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/INL492500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1707c859fdadacd6a0635ec2cccba077c976388cb31f0c1df9ecf635fe7e0ca. 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/ING212521772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1275c567452b0cd964eaad0a69af5fac16757b51c8edf28ef9415cdec1d9d95. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ING212524451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cc284fb6f529a419c3612fd9c9332c0e09fd4719d312fc018e898da829ce36. 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/QZTB72548465.