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 0x311ceeda7f6ac23c287ba3d6bf57b8bce4d9605d10ef371c54b1a9f81e6094ee. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0183387-3fbe-4bc8-96a1-bad547e1f005.json and https://artists.proofprofile.net/proofs/artist/b0183387-3fbe-4bc8-96a1-bad547e1f005.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 0x2fd1f45bd288b9ccf65017bac092cfedf439446c068572cd59ed1d6a738edfa5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:46:25Z), 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/QZWFJ2448525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd947de8f5d21d37e8a8976677a5e976b8e3b64503efeb9d0103f251309e2ba9c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ772483659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e75184308d900e04bfa712b026d1e7d1f981185881cd7969d4a593c9d3849da. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWR2546118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa232d02b634e95e11c04a2e1a9d3a935e1f16860e96c3cd8ae65fda7bbd5ddc6. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNWQ2580234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef03035d72c603c2d938c70fdb36607eea9d681ee8076471d871c87963cdd96. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZMER2599672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9449d2f3810877cef25c9dc377cea10d84bb585a59f4641764d46059eaec541f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMER2599675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8baf845f390eb41139696662a3b1926f448eec46370271993661b391b2dba62. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMER2599677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040b0f4b0afb4380bf58497224f448f423799ca40ce17f8a2ab133483722cb38. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:01:06Z), 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/QZMER2599681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bdaadd45a875524b95fee6e8c6185d9eaef5ba72725dd715a9ace94025dcde. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZMER2599683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aebba61bc74570bee9c97fd69a8a3d1b1b3efe2f3c89eaecc1195d6c31aee8b. 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/QZWFX2530412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5d347d8b8bf0323897b058a4bae63f4fdf4bdd8d583a958912166672002134. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFX2530414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea4c75e06eeb9303062baafe4c00845989241c9e0c294bb5397b0f6751ce3a1. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZWFX2530416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682706dda76a4c5010d18dc99e2d4dcec35da1f2f7af43a2deb2520906136f4e. 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/QZWFX2530418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d613b784b620717327deabc37d5b83ab726bfaf783da2e681ff9041a099bef. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7X2517785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b298341ceb63c4375097b5f4e3d972615861ddabd2e95be74478312f6e06861. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:01:39Z), 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/QT6EA2508054.