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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bf04c225390d708a853e8142bab6d31e9fa4bd7dacfc955093d3ec27644f7e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d54e12b2-f0a1-472f-bdc8-3e4a994fb493.json and https://artists.proofprofile.net/proofs/artist/d54e12b2-f0a1-472f-bdc8-3e4a994fb493.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a3ad268e2908e3046a87d33257233bd20e38bc3aceb483dae1dcfff4df220b. 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/GBLFP2372198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af8be31cc8bea3b4859267a43af850845385f83bcfcb560687b43119a9ba053. 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/UKXN22418282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b7772ac942b6e6bc1c075438bc0adef471beba34c4a9c66d352b4b524822ac. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX53U2322820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2203e9b388518015cddefb3ba9622435a372605cdf3f9b21ec0ca7d1e1a9405f. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GX53U2322822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd7b12ae9edf998b2dd8a32ca438d8ac230c224b0f063c51c798f1816271f0c. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/GX53U2322824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af8be31cc8bea3b4859267a43af850845385f83bcfcb560687b43119a9ba053. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/UKXN22418282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8416bc9c15c82c339ea5ad6f6e1e981399b9584accd9a13084ba97781c00f600. 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/GX3Q92528720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe960ed30e6d10c72b73638ecae19526b32d4a18b494dc48adf89b2d24bd4f81. 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/GX3Q92528721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7d75e28764b74dc404cdb5abc54e05545b3eed9640e6aa9ca66dce3394b766. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/GX3Q92528722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840fc30395f64fb4f67a18b3428671c79a9e937629476eb92c67b01041af41e5. 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/GX3Q92528723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b7772ac942b6e6bc1c075438bc0adef471beba34c4a9c66d352b4b524822ac. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/GX53U2322820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b898513ddc1f6437dfc4efec6fb6ba5daae1d8a0428126b8da8ca7ac59e7de7. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/GX53U2322821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2203e9b388518015cddefb3ba9622435a372605cdf3f9b21ec0ca7d1e1a9405f. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/GX53U2322822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db0e397204e285c2d25b27b6ecac3eefcca0235012369df4ed560faf4dca1da. 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/GX53U2322823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd7b12ae9edf998b2dd8a32ca438d8ac230c224b0f063c51c798f1816271f0c. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/GX53U2322824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a35f198538d95036464a6132bd3d7d2a0f86933dc732b0ad6a5db70b2b95045. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GXHG92507565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a269f0ee516a22725096d2ed9bb0d1d8394936492923c04b4618bb3599de293. 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/GXHG92507567.