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 0x476c88c882a69cc13d88ceda8f87b2da14f53a6c6634265dc6ecdf9dfe4e5c39. 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/c293be60-9756-4732-900b-6b67b4b24fff.json and https://artists.proofprofile.net/proofs/artist/c293be60-9756-4732-900b-6b67b4b24fff.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 0x87e56ec96264ddbb432fc591777a0547ce6bb27c1697e29c7cba1d70eb5354ff. 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/CATL32000810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce3374815a7d87d156d570fd087906cad060c5ea8866ebb006472807cf2600e. 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/CATL32000811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b33461a53c7340e8add6fc2b9fa24f79dc01f5ec5d18e21ac1035ed240f7ab. 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/CATL32000813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3d460905f9f9a7e66a095b6f615e1a047c49b5a6a300fe8a77762f51f511ca. 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/QZDA52044779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda983b8127a38cd46596c8db97f5303b328f53d10be42bf538603edd52c52c6d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CATL32000814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c93f7adf2e95e0d296a6e8d53d8c611d1c2ba010cbb154d0dd5f454768f2e5. 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/QZHN52035728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2426a0094b70f0f42306d0e268876647f33bc8cd3810eae3706e488b6773e2da. 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/QZDA82024890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0af39337232bdc110da3d5c3c9116e6c53464477270e951afe805f801ad044. 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/CATL32000815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5191af8922be2ab13f69ef65b67286162a70152f78e49a553b02e552ffc1fcf. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/CATL32000812.
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 0x93c29809930e87f0af5299952dbe57559e21ed5146ead887c9429427dc610e58. 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/QZDA71815707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6c35ae2301afb429d51f7295909659790f933556ce9f976cf27660b4ba087f. 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/QZDA71815708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b49a2db262b8b2e0203e5b1d7f5fb3c430f080fe3aee20e0789c75a30f8581. 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/QZDA71815709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340273f9c7e67687df7fd8eac321000d0418416f5404a63a20beb7d9c63c76bc. 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/QZDA71815710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c018d79763dd5e05d34c8d41aab7fb52b775301af5ee1378696904cfd42dc33. 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/QZDA71815711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87f420a04b2e49c2684390605291e68b1d816aa66576b9a9759ab3790288716. 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/QZDA71815712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8555314bf24df433f302e21cb3cab12ef7d8ead2687c9524881200a7c7257a1f. 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/QZDA71815713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4c4c5ab6d3f27dd5ca668bf3c78afcc6f7390d9aef4750823b09730d1eb18b. 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/QZDA71815714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818fa496df780aa6d6f6b49b7c5076f3ddd77c28134424d8c9e2fbd4f8a5429f. 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/QZDA71815715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0255746b020e2a87ff4b21a84429473afb6e0502cb9de4b3d600e082974f954f. 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/CATL32301900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ddc1af661a375b397bc31318351fe761d448afa831b1a7aa338ee25baddc06. 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/CATL32301880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d4f51d3a73c3842eea02a22649d4ac818aaaa3dc04e0620dff8a146f039d37. 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/CATL32301690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6700f4363a477f0b4d68300f407fce78fc2b99d23044a54ea1089b0079d76d7. 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/ARHXW2102762.