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 0x9697e71d3f0ecf9517fa7924659a254a8bc51354922bef759aa3ed94242df91a. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efe3e5a9-293f-43a9-b245-bd3d567f90bc.json and https://artists.proofprofile.net/proofs/artist/efe3e5a9-293f-43a9-b245-bd3d567f90bc.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 0x4c57e6bb79991ce0262c18b867f158a059a4db80347b7713340f2bacacbf9613. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NL9MG2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239159906225c2505cfa5fc67ff6f54e7a188ee88e547c420a665ced7fc50cb8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLE612100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45aa046633966c8736747bcc94763d36f2e381a8a49101f29909dd417f2eb9b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLE612100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9896313a01164177753b61ecb6f9a440c17416ae681301712ed738d9b1d911b1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLEK92100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbed665f3d880fb27c394b34e72d289c2b9bb9072c9e2505ee1fa8f755dddfbe. 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/NLEK92100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1313456e4ae2cf7a242ccc29e9536a7e925e2349b317ac29f9eeb43caf05b07d. 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/NLB8R2000119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca40aba37175c6398ea1d94a8b7fe11383e0ed0c9b96af1ccb478a4c2d8b42c. 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/NLB8R1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ecd6ea4a3a67053d67adc6033772106007e815030d1978eed313aa3391d50b. 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/NLB8R1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525fcb1e92aa57436c41acde40215bd6ec8fac8d1482d36a9aadb22c0c5da196. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLB8R1900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0061b1607b96efb9e455b7e9d88f3d62d685bdc73b564f21d414c2cf5cc524. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLB8R1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15eb8c6ce7d5fce1f22246035d758811e2178900acc474de9bd3c87da853742. 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/NLB8R1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7bc688e3fb18ba986a143f09ffc92da35b74a5c4e0ee52389e370f972ec944. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLB8R1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad801358c9d25edfa3fbcbf817576d15e90a418ca0e0d78bdea40b1109b9925. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLB8R1900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4262d0f36afa78865d7fd66b0ca1b14394fdafe1fdf7d8904a585bd76c80c46b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLB8R1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdec8f3f824669b32c98b9c11aaf6b5c33cdb6d4d9ce9e9e21444aac89fd378. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/NLB8R1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9623e65ecded7d166ffbe24645294fc97fa5ce6cd4c45fff383b1dc35ade0e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLB8R1900025.