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 0xe5bb5ac2bab91195ddeb5002eca460f90eb78a206f795b62698d19ece27c1b02. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f0a4296-0dc2-4bbb-a313-46371d256f0d.json and https://artists.proofprofile.net/proofs/artist/4f0a4296-0dc2-4bbb-a313-46371d256f0d.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 0x6d4ec0d86eb849799bf7f7da54183f7641d7b78e10f3c0d167f6061ab5e3316e. 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/BXIFD1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42128c0f03cb6749103b02759f430153705165fb25d0f2f40524d00f4a7f3f35. 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/BXIFD1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b58050875cb47e848ef51b602efb7f1e68688156509bfc2b04f06c239a56001. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXIFD1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f72d31a8639c15b3df3454140f391c8636299bb4317ea0a41c6efb5b9eafdec. 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/BXIFD1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b64785456cb54b22d23b62f3e520fac0a4af453517fde3197d7c39678c5277. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BXIFD1800018.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f596061e8302072f0af71d5b7f418e8eb8554a25ce0fbdfcbd05468edfe881. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BXIFD1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fa3a5b3e89520aea389318aeab31d291c36cc619cd0e71010e63b7f94c953b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BXIFD1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224d6c7574e5da898a09ff4dd14fcd73c2221ca0711422703a5704d8bcad0f56. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BXIFD1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac52167f3a4f42dbef87e3827bb1d7eff290fa53ae238a81bd4ee2a64a9a5307. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BXIFD1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba2aeb1205196c013a1399471325a849c975ee9eacafcccc00bbf015c88143c. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/BXIFD1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd499d5ecbfb0570e99c5d50cc67e3d3530f7f124fe80d56cc80c2ad41265bb. 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/BXIFD1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46268a5257b8c2b6723202e1e8c6392c39dd68715af0c6c011c793ee1bba306. 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/BXIFD1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fa51d556357a1be0109e9c75254b17274e7e7de3de752bbb78055f53c30eaf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BXIFD1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1e1c7c2ac88dee0edf8b7cf5fec64eff007143ee1043b55b894b129edb6ce1. 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/BXIFD1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb9f22869a64d7a3237d701006b688fbbf06ef30e9322bcfb5e213d530ea97c. 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/BXIFD1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e494ddf829050a7b7e555a6b6a6c65c0c37955c4b04a8872b04ff54ebdab832. 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/BXIFD1800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5fc1a7dc402d8447c38422df64a777ef89c0d457bcfbde777d1a59be56b8ff. 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/BXIFD1800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c61c6cc09a9dbe1b544c27b321da6e79553bf4070f71d2e98443a1bd85823e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BXIFD1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5fee03db0a34d49c1d65aef66a66ea68c8205c7387a0cb5192d7fab702fba7. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BXIFD1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d9deae116a3adcd77820e35f5a5b005146eb3e2f2b138a41330f8aa25d5c29. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BXIFD1800022.