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 0xabe5b3c38f29e5f5c1f7136cac4fc3f52f29f3a38597eb2dad24704f7bd4819e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd1acbc1-daef-406a-b833-7f579c2ad7de.json and https://artists.proofprofile.net/proofs/artist/cd1acbc1-daef-406a-b833-7f579c2ad7de.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 0x6099cdf57425825c3c3194001e27c9b6cdf6879f8e0df2b26ad012b50063a27d. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:40:19Z), 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/USDY42286331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8173cc056b1961e34c2f3d936c6c5894f807546df63a49946f7a4372eba04105. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USDY42286333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ed14f5a6d206ba204502a4a003283a89f0ce79fe7c86f627ec54df64f5a7a3. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:34:58Z), 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/USDY42286476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdb30370403f8adbdbdc3a801c160c8fe12b52ca1a3939ec9bad584b69cfbe7. 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/USL4Q2306746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dc8b8c892441bf33f9875e24d5973ed6f4b2e1e493d8214b4c9e9a891cc38a. 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/USL4Q2303505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14fd7f3fc4152d3591a0bd6a4cb1df3b010068ecd3fb039139a6f5ad3526dbd. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USL4Q2305766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39ef2bf0ddd2a457c7c19ce643bf3a51777200e7962907eb1f734b75c180684. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USL4Q2305780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54183d97d0b579aee00861adc54f01fe401d7e23c8c2e80d41953711b7c854a1. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USL4Q2305794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98992618bb4e159fe08c6cfed849a738d3e0f8d17d3902e5b4df29a781f27339. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USL4Q2303954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f09c466906031edb2ba49ba46a3bbed185e653d18da06550a973808bf6a7c2d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USL4Q2305783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf656c453b7789613301fc038cd55205dd6efa33252c6348261e43571c05a16d2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USL4Q2306793.