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 0x7b51cd97b6ddfc96f9b5fb6ced5c400f8b77e02b6733c97cdbda0e327b080044. 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/e2400e2f-5720-4445-b1fd-fe1a25e8c127.json and https://artists.proofprofile.net/proofs/artist/e2400e2f-5720-4445-b1fd-fe1a25e8c127.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 0x2ea708b1bd11d83f5926c82f87fb64edecfe85d25543002c8efd26d19f7a6460. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZDA41861637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833d2c5f1c2c6acaa60f13369b9baea1b4f555f7fd98d1ececff31c09ea1f09d. 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/QZ93L1820513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975bbae7a7535b53fe9d633433f1bdbe4d9fca94a94cf35244a635cc21f5f5a0. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/SE5VF1904569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7847f7f389028d8105d32403d2e259c9e3aff7a83cfe94c963f2a4825000c7. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:14:47Z), 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/SE5VF1904567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdc21bfbb2f42394fa185780442b58d0a0ba878c616d71ce4f2b1aa6ea24fc5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:00:59Z), 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/QZHN91986013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8313669d617c1b8089b14ac03b70c4aa7be042654316e7043aef74df6876b466. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZNWR2063455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689ff79fc8d7b87d6c41141e9e55c1549edd4155e2630cd864bc68d211d2d23e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZMEQ2253715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc579a1dcae9ff9bdd59d63bd138bdd5871865f8c28cc6133ff5deef350c917. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:02:06Z), 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/QZPEW2451412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889734156a7792cbbd11935f30f3f6b4e6e47d8b6e8c6be84a113e2e151ac4a3. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZPEW2474086.