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 0x27e9f933523fcbbdb2bef4d63aa8f1e9591f077856dc20dbb23d80ab45b1f4cf. 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/23936d7e-789e-4474-821d-b98931a07145.json and https://artists.proofprofile.net/proofs/artist/23936d7e-789e-4474-821d-b98931a07145.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 0x792b9e1ee9cbe98d5cec8ca0d45a0ba790a721969463091bb6ff3ce97ca4ba71. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:08:13Z), 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/TCACS1660571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b82dbc4fc5263bbeb118ef44ec977b9c71e2c3b9dc7143817f3b4fbfb1982cc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:39Z), 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/TCACS1660629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8ac2becc6ed593392c09d7441319122c9a85387db6147c66376cbce62c5b5f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHZD2137702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4368c6b3957e033b73bc020e427d612bc4df834a445ac59aabfe3bb6aedf07f9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAGL2238821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233268dfd1d99b27e681799b255d3c9a0b067ef460034152f0a50376e633388b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAGM2222691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e73160329e8705ef7b8b4f5183463f29748d1549f3bbc09759f886807c1dc3. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAGN2274333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0c0d0a09063d96d929e2c18f5bb49eac90b32b2ef4868aa2bbd132b0468283. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USCGJ2551492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1716e147c0118deaf507e32eda5520584e413399f15dc364a9e327b804507e5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:38:42Z), 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/TCAJX2580804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbab2d209b4142a6d0efafe07860796a0fb5d5cbbb26d7af3fc84e9ea3328c25. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJX2580821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ac53b8c1f879f0f677cb17854d5c44f21122cba316a998e5e4c8f3b8abd590. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAJX2580825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd181fac93d3b46fff34556b4e20d19f0a4d565c2e09e30e70b9cc2286f4b7a66. 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/TCAJX2580837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf719f82303910f46c8803718238d0c7d3c0019fa94f49e743ab61214a771bf26. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJX2580844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2d13e679e0a428291d50eb9de188f2beae0f55399ea720bc0d2cc73d35a3b1. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJX2580851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274c2045ba48a9766463b6f3b338abc2935c0392b132c568b023734d689ef439. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJX2580861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88999176b1e5c20f1c8457d9473f3fa74f9880f3bdf0eb9ecc73922e9777bf6. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/TCAJX2580877.