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 0xaa3688f6e209e29a38adfaa5e764a6b6b46eda4b9f2b05d73dd86df4e02c6c20. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32a80d01-b6ae-4502-b391-87436b29b643.json and https://artists.proofprofile.net/proofs/artist/32a80d01-b6ae-4502-b391-87436b29b643.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 0xedf854f6aaff30c960df3522081b8438534ee2b8df95a9f919036a530c9eca28. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2501677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7db50c5a0fbf4bfc987a6f2fb179142c5321f9f5f2c53c077a21371634d353. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2506015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466839892970b67b8d13c3e3c75511307758e50fef8fdfef95367a2891a65deb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2508094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7db50c5a0fbf4bfc987a6f2fb179142c5321f9f5f2c53c077a21371634d353. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2506015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf854f6aaff30c960df3522081b8438534ee2b8df95a9f919036a530c9eca28. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2501677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3172a63c17dd52fa3bc37af243ba634f2cac8bd457e2e4aa0bc7377b430339c5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2508093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dbb4b764bfb49f0e89a488fb9ad033d52e69ad35c4d5d3589144bfa97282bb. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:22:38Z), 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/ES71G2510669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe492cfeb99ce99f0728c0d9251798905be83e51116fe30e5ca85941dd32e14c9. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QM6N22584409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dbb4b764bfb49f0e89a488fb9ad033d52e69ad35c4d5d3589144bfa97282bb. 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/ES71G2510669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe492cfeb99ce99f0728c0d9251798905be83e51116fe30e5ca85941dd32e14c9. 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/QM6N22584409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1353c0cd85cc8446040ec57cf0fad41bc74ee74445f78e2c467779c9e38ef90f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:41:15Z), 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/QM6P42511431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d86e73cb6c7d7be1faafed2c58b369a5d523c96815dd9a266bc3f01fd4a7d82. 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/QM6P42511429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cad4ae0c9018b8189e401454e79033df099c16cd51719a0050cca6df8dd1cf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6P42511435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef00c9a960acaf8f14733912e86a54abe617571533f1c0eb5b88c794ce134bb9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM6P42511439.