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 0x16fbcaf524a86466fb6864b968cdde378f1d2a3bbd5eb7ea9549a99d1de7e8ec. 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/4b795db2-986e-474a-b452-25e0cea692e8.json and https://artists.proofprofile.net/proofs/artist/4b795db2-986e-474a-b452-25e0cea692e8.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 0x29a0083db04752224810521ad6e05473afa7b46871bf7ae9d6c85c884174bb47. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHPJ2275534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa654344eb2912144265e28307f4a22b2284a2965231df3feb07e02fafef5f4a2. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NLFL72200405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd921b50f00904f8fa1352e9ab442c580bd9b314f803848e2fc31471f4ef34b. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/NLFL72200409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99471d5b3dd0361ca8a011766928a6f1c05b5653887906292fa22e936c712527. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLFL72300510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cfc489e9d9e2a097de7531b6edfd0507a9c9d4bfa94510ca4c7b4a7329e702. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLFL72300514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2f5a2847e1fc90ade06d838cc737dde42ade41786b7816c8a97528bb1921bc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMHN2358418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f60f3cec4fdd6c2d082a4d0a5892ed447138fc26b6c14cfda049f024961a00. 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/QZS632246952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de76d14740faca950e6fb0c4ac366389f6d6430bc1407b066dfd8795e423da1. 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/NLH2L2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a656a5e6265e7459a79cd0203e7e1959c2a4dbd54cc8008fb6a16711e4775c. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/NLFL72400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69236cb8ded0b3f3faf3a0ec9cee64d655e418f36e1fe0e4321f17a04debd33b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLFL72400563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6793862bebd6a97a4acbd63c4273febf134232797d9631d85dc14c03f85eaa38. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NLFL72400557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fd2cd4a4991343fce7a591b3ac153f976738967eaeb475c98633e6d7a2258e. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZK6M2519666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ea3b5c922114523d4eb05a20427df860986cfc1cf61d1371d180dd0ba7cf72. 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/QZTB62519591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa654344eb2912144265e28307f4a22b2284a2965231df3feb07e02fafef5f4a2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLFL72200405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ce259047663007c6f5669295927d6367443bebf1cd76565473ae7cf8e9178a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLFL72300778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089f4e0f079ef17b53b3e157e372b67201cdbb8f17ef340bd7af28f72d62da3d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLFL72200353.