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 0xe9b3ac8d9f44263618992c1d0dd42dd349b4c42b73632e8cd9beea9366db47b5. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd65fa22-5d68-438e-b955-e8186fd0abcf.json and https://artists.proofprofile.net/proofs/artist/dd65fa22-5d68-438e-b955-e8186fd0abcf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Set of Four Native American Church Songs
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 0xcc75cf6988a3b38ef8d1773161e34148bceb46a14ea050fdf6d8282a1b2e1966. 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/US8641047702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98035bb685152e0605573b58576388d5d6c30acbb79bc0d89688bd6b589d04a4. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/US8641047703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5947a0e445323f47c0a9d6374c58da15a994afcc442ea7d1d506e4d28f506245. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/US8641047705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5f726f4fe05ece828f772797544f6d920545bf622516527314281669f1d7d7. 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/US8641047706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5768f00fdd5a18f10c6ed2be6cc950f9fbffb53864eeacced3f11ffce1662ccd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US8641047707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bda2bbc2d49aba62e34a3bd04db4beced40437798a77200fff729306430ebac. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:25:19Z), 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/US8641047708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223b203ecc94afdd767341ac7057e10aab8de5536942e807203680a61b7f975c. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:10:54Z), 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/US8641047709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85023ad66c931fb3706f30adc3ddde0558b4b6fb0f0a2755b70f6732e5b3c688. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US8641047710.