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 0xcefaacc585ebec8865fdd0bdd46dee74a55f6e16d41a1c36dd7dd6c9a765b46e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/136e67b6-ed89-4329-98ed-3f04cf5f5f1d.json and https://artists.proofprofile.net/proofs/artist/136e67b6-ed89-4329-98ed-3f04cf5f5f1d.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 0xadee6f135e670a66cb4f8f03990d0d86b51c87a051d4fef5954224fc4d94eca2. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZES92357191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3ba03d56f2c3268756fb3090f4d63058859eb27593286dca22efd5129c6716. 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/QZHN42351973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf005ce863d228d927b00cc665a60778f051635f2802c644f7dca37bec4edd5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN42350529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9c14b86af8fcf75074bfabad4a5bb9c7469f2cf3d23be67145d95393195cdc. 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/QZHN42350527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad6fb87afd75c32a49c84f93bc66d2dc6b628b4daad1b1cc17820aa89d44c13. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN42350526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e71b26652b464a83b97aa8843ae88b46aa4bcfca1fac4e8f82813f4cb4347f3. 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/QZK6Q2340867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31031d5cf72a7480b47364feafe5c3aa124a00d9b62f83811105f86c80fa5f2. 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/QZK6N2319314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063723b179f08d92201042dddaa6d564b9e8380980ce4692cb3ed8b2b2c50289. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6J2381753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee228b927ac9000d293efb46a0b360d03286b4fbaf13bff15e7d9924bd658b19. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6J2379227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca43e8caa11873d96d089d7c6b767918eb642a0619d52125688fb4e84f91241d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMEM2350735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ca637a7b92633c78ad2fef0c04934f52e791560cb873f60a777093b549212b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZMEM2350736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fba8e436c73a4b7592553791b41cf144e009ace171416c09497635f6a54e71. 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/QZMEM2350737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3602776198c6c8ff84879bfe4c9f0e7a66243228f76cb25524261030e3263149. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZMEM2350738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbb78bfeae8e134f9cd3586ce1355a6cf1f8dc4328be5a658262efbd5d89f87. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZTBB2323832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86a98cb2e79379eb1736e3ba0c615fdeb229a9a073016e96d4a1022a87d95d4. 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/QZWFN2397883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8ea7e64f377873e8faeddebf457849cad287996f65f5a25f60248bfd06fc7a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZDA42404187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216a7941d7161f53ed210f4fd874f3010666bc5923c1d2b109f1cb7b00765996. 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/QZHNA2430422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45553008872b9c976e2707d6cb3a6493f8c07ae1234f7505670d290c0281cf2. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNJV2439022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02176bb31c662d9afa3b72f76dd3df9130a142ff03a26586dbe804421add76f5. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:06:33Z), 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/QZTB72497252.