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 0xb7c4a6da72e6c295bbdd343c69971b141d52e7a5cf3ab612293d507873adad91. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71110645-ae54-40a0-904a-56f7b6cda262.json and https://artists.proofprofile.net/proofs/artist/71110645-ae54-40a0-904a-56f7b6cda262.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 0x23068add3606bc86a18b8903c51b700ff9df8efae5800fbe13255a8e311d052f. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:10:44Z), 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/TCAJK2559448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e3ade819c9dbbfd44cdb975cb510565e71dd2f98af3ca4bff3c6d1b0fdd227. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAJL2542482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa74df61dd5c652004d3cb3ffbbc99f36f93fae3bc0a45188811212b4df6645. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJL2570059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7500c8c054b9acfe29c6d55b3455b92746a29a6be5aa7202c1a9ffa9d7ea2d8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJL2569741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d9219f3fb299c90ae40dd674d267acae2d53a140a36e3208365de5f918f7f2. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAJN2533160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383d5560c004107af76e777256e6623f3fc3415ceed1542f44c2567450638381. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJM2533306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f68bfecba2b748f84abae88fb33b4f21f0dfd7d3d8b68f2865453ba7d6754c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJN2564313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad6bc16c06fdacfc7c0f565a8c5350479838e767bb9cde250b46b4ae82e0eac. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAJN2593815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1fc59e6e7d38956819c7867081b118250b68c3d4dffb6c826d40729b76e501. 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/TCAJR2523646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffc4f66b522d91eb2c527867b7934d2dfbe17d080096303b47cb8a1ccfbfe6c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJR2555019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae84b3e7d449fb2882e43767a39b25b799c4e172feb40be8b8f1a79f9aa4a112. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT65W2517418.