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 0x3ffb98872c3b816b5320b760cc77b8e122c03aa0c73e0d9f3137a90efc4c080b. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ecb1aab-ba08-431b-98cf-838645dc7771.json and https://artists.proofprofile.net/proofs/artist/2ecb1aab-ba08-431b-98cf-838645dc7771.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 0x62fc799b08946740f8af15b9ab31f42296cb1855113e8554090e198d2ad10900. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/AR88N9800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b2349d7a0fd05ca94fba05bad033a7b60a5476f6fa8e05176f926c990cd910. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:17:30Z), 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/ES71G1735614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afc41fe5b4fcc52fba95f0a1df825709172579f90c7da68c637507cf5579d45. 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/ES71G1735615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c22e68bed247bb6f0f4842db7d5163ae5e6d045acee1258d1408b6766e5c3f5. 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/ES71G1735617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf52e82529db07e2ecf2c0eed51ba32f129133c8ecf832c82afb71d315f6342. 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/AR88N0300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ef8aebe5df9bbe0300f9ac823b1d2182b0052ca6c2d2deaba45ca6743e0dac. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/AR88N0300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b950ce80853fa72ec2cc1ccf0ef2d49d7ce229ed8fc925a22babfa10521d2e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:37:51Z), 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/AR88N0300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd42edef5bb9dfacb75f34d4761f89de5a6035c7a621a4abe9ad5315cccc3b1. 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/AR88N0500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924dde65c273ea8a48609804af15f80f5a823038b95766c428f98aca7d5fac79. 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/AR88N0500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176774fa8436a8a212e9c5ccbd5c65b82a6f4b297baf0c5b3e14add43e73cf34. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AR88N0500004.