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 0x647886e27d30ef58d679c2ed4a7e1decfbfb44c284353218600c2726c76158d1. 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/36aa900e-4f7d-4b62-b1b5-d793956c5ba4.json and https://artists.proofprofile.net/proofs/artist/36aa900e-4f7d-4b62-b1b5-d793956c5ba4.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 0x7cffc75ced9b6daba3ae5370c837ef07018ffa8b65f9a327b1b462096cb1b38e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFYZ2452261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae473fa5e3cb9c5ad98193d0c11f0da7d6adbec7a875a20241c47b00378aee29. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZFYZ2452266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca48f8b0ee19e7514abe06e11b4a40093435c188d115e256262f2a0423815e2c. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZFYZ2451670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae989a18ef76a7e5383a7101f94890e1e27dd6b77fad68549095f90309cb4b2. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZFYZ2451672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8b3932a525caa87d8b636daa4d123ed7138743552e31015deae0320834f0fa. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFYZ2451675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419735be508824877268b51088787c1764c53c226fdf5b513bd9da888c5193e9. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFYZ2451676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd54dbf9767c70edfc13682a14f9a16d626846c869085367d8fb8cec54933cf. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:27Z), 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/QZFYZ2451677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a8202939533d3cbd3cda4ff7ca8674b07d6a9a964e164784fa87f00cbf70f0. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:52:42Z), 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/QZFYZ2451679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd600d21187dad2d08aef9264ee2cd4efb5ce8fc7684d0b4aec9a400d5c5a357b. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZFYZ2451697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d7940c2d50f0ca72e7f9f64fd949b4542995b2aaf9199a246d878a4ea3fa79. 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/QZFYZ2451707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0174c949045bd4bcd4881bc7234764ba29c9f2ebc291ab3ce830f608d6550034. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:48:57Z), 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/QZFYZ2451708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db3e569266156412719baa8455a698b4f8d94328c80ebef25cc5bf32766f458. Chain 2 (Bitcoin): anchored in block 956809 (2026-07-20T11:51:13Z), 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/QZFYZ2451713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a647efa4d33c1b4d80a4bc47748c34a97f5739699acdd2f57e5fd468bee97b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZFYZ2485334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7907ca57f5d72abc4c279c6b4b5c0b09c8f7155e5bd73aab29ec9856d86d6b53. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZFYZ2485961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4643558845318bcf846964e567ef4a14ef9172077aa4c1a052baeae2bb00bc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ22497673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9140568aa6827c353a2f00032cd59aed0e9134c7ef41e92c1cecf076e19244d7. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZMEM2497917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e571b091411215fa61dc696031470dab354a8faa83833e44bf439b17b5d170d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZMEN2487931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a8216f0abe2333e1218507ebacb250e0718590fcf77c861e96847f0cd897b6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZNWV2444516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8cf6db7d7c8590f3b04bbe192b003539cf27fa11bf85571b3eb3fb7fa66089. 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/QZNWV2456264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7193478cb892a6d3fc520f88825385d61a19398f2d5c0f3809ad377c09d5dd. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZNWV2456279.