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 0x280e29280908c78b0f97d32b991a02b4fe5c92111d634a7c4af941337d1e9c9f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5d8fa2e-c982-4478-b27a-f507be397241.json and https://artists.proofprofile.net/proofs/artist/a5d8fa2e-c982-4478-b27a-f507be397241.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 0xe3fe0b851f255683993ff50555a2b2da6da7234ee7b04f472d6c56fb0a332798. 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/QZWDE2301716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9fd8b30a5b4ad5a0ff36702dc7ce71f985d2487f3aaa015b99537389b4ad3c. 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/QZEWT2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e87ad758fe397b4f8149d5661d3bec6787b951016ea8da5870b663c5c27b96. 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/QM6N22082717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65282d2717318f4a3a1e61bc15c15f5126b902f03a48201b4d9aa44ceb64ac8. 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/US83Z2216111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f42511bb3a163cb439f4d9237e1c1df2df6fd51e591d45c9288fe487cb2734. 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/US83Z2471663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681498fea2896d139ccf8f4912b8aa000dbaa2437face2541240aeddbd95a6f9. 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/US83Z2471664.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd371f8847072b68443b28a7307c30370ba1515d15170fded3e143d323cdf846b. 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/GBSMU7218100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9a8f55a95b518e745501b56f7296c35c357306a7413a6048f8fb440662cdc2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US66W2301181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fe0b851f255683993ff50555a2b2da6da7234ee7b04f472d6c56fb0a332798. 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/QZWDE2301716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58a8050ba7e553c371509b155f4b0460fbb86c059927ecbfc457b523c20b0f9. 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/QZWDE2301722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3faec8148a19dd39ea760f627dada26c6164c77934d256fb92aa4dfd635ecf0c. 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/US83Z2232760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1648f123cdc9c1d2ed20461b2f57adea14ed4336cf440642800a2717d653339c. 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/US83Z2232759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1328c9c8f83a01e707ecc73ad554ec8b9531b7c499d8ecb687feefe401f98b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US83Z2232761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf792692c47fa7f6718e15fe151b7a03e0d4b16a78fa266e622b0d50911f00796. 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/US83Z2232762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347123495e91e9ea1046e1ad1a95c6c060cedc8cd983b0302275be2c38c790dd. 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/US83Z2232764.