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 0xf585a092f694ce101b8f66ecf547885484601e0c362fac859efe25b5ccf1359d. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76377f1c-6868-4862-94bb-82e3cb2cb889.json and https://artists.proofprofile.net/proofs/artist/76377f1c-6868-4862-94bb-82e3cb2cb889.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 0x8e61f75e817b48ae34613bfb81e048d03605df9aea28b207fc921bcb4a3a52dc. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCABG1273667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8e980c996b92b33487d1be2c668c9aa7cb711d9efdcae6555a20319e200b06. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/TCABG1273669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ed746599bb9fed5cbf102d8b11ada9a29828f1ff8e56a4768054e5832bfee2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCABG1273675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c51459dfb20c6a94e064ff490eaabcb0f383fc0a44e2968cde8a875faa408a8. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCABG1273678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103b40e57203b7d1bfab7b5108086b54938701557f5a058486c7a36341cc66aa. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:29:13Z), 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/TCABG1273679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83cab56eb20980b94b6d2cf9b69e14dca72bbac7dc8468390b19a6f5b417ca9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCABG1273682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca89d1e82eb845371b08a605f3b60c672544313d0596a508bc25ae955d672e3f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCABG1273683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbed07d2bb2b35148bbe130ac92aaa2f9d335cbc8125e753d7322e44393a6308. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCABG1273685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9178f03d69e48661e178984d0c461d33d01c6db855ff35e90c1033148bcf1af9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:35:16Z), 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/USCGJ1668351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfb7b3d7ace3db6197c00105f4bcf94bab6f82fe832e935df83c3f6441cc552. 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/USCGJ1668360.