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 0xf8855d2c29180c2a1992e25c9ff2757732060a65490892d6ef2eb7ba40e076aa. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82d16c91-bdec-46f4-8ae0-140d5dfb08fb.json and https://artists.proofprofile.net/proofs/artist/82d16c91-bdec-46f4-8ae0-140d5dfb08fb.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 0x9527cd8a26e6ec044c2c35bfc8a3932a8452a7b09634f7411d2d8208187fca7b. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/GX4R52138808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaaa6f40bdb4cc37f0e327c5581b1be3eca24fd4eec34b4774e3388c77dc1f90. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GBSMU0086953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8b2706f99797e465f921be8451be79ba4f1e4e8732c7f12e5a496d185e78d3. 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/QZWDE2381550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9814af4b34f7aed0383136e00d40a78b19be79d65bcd92c4c64cf903016691de. 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/GBRKQ2489844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531250bf9d66036b1de515e1b21e52640a4bd6f4b0a44d47d6ad78ba7d9df515. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:57:25Z), 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/QZWDD2445624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3882d78c75a643260f46d3ba27919faaf98a35eb49e72b943cfc21c37b19973. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZEC2424906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe407f21d32d5f6f81728763397dbe61b33f86d93be1d99257f29358c4ddbaa. 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/USLZJ2578887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd4ff53f8300cb0a44116476be7195de8e9f8ab383f8ada6eb4a81ca94d7b64. 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/QZWDD2523143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b868cd7b1fa57155e37bff0532e67e76412e309cdba39bf50cb0c74b9af027d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWDE2574364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bf44b446ed44bd83e46eb5ddaf250b385dff84d0eefddcf3e6a0f180eab6cf. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZZ8A2537128.