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 0xb95db3d603cfafa17411a6f1f97597d88658a39ff381944258efd9cf681f6465. 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/0181f594-f26b-446a-8849-6c13a14fda0b.json and https://artists.proofprofile.net/proofs/artist/0181f594-f26b-446a-8849-6c13a14fda0b.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 0xca1ab131127e2807ed972f004e9d3dea70c84c0513cbc0893d366b5200f02242. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QM3DF2142651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dac8a7b56db42baa469684be4ad3aa1c5365ed18949a58f964d0b99b30847a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TLREW2222820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb1b43383b960c88d4659a14496e0cb7aff85d97e591b3fa3f533cf13cf0c32. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TLREW2222824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fdee80b96042d27ba1ea3dfc74c3f708c478b299072c811383aa053a611b1b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TLREW2222827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7f6c63d8aa17fe9fd84d2411e3e8eb4100d07060946f704f7f90eab0dfb8fe. 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/USANG2276991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08eeb82c76ad2a510bdb0844992de0914e12457f3918d401f62886edc9b54513. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM3DF2250564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0804b93ad040ed8317db0ce1a5949b6cebd0c13b474a2977a666391323440aad. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QM3DF2262058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb13b076ae5ae30d7b6204a6cf2be5103e3b344de2189ea303dc33c8c7602780. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3DF2491960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf518ed43c485e891020972be43397c528dd9c79acdcad34eeb05572c6e9731b2. 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/USANG2498976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd18dc11689afcd1197363b2d37c3278ac66fad710e7e7d4cd2503a3f430494. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:42:49Z), 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/USANG2512681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e95b12ceda14b4ae30dec94da542fe06e5984dcda09a901c372fdd009def565. 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/US3DF2418961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4181706c7da24a4190d549042e154fbdb3c7c207460cbbd5a740ebcd54a438c9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM3DF2219438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c479beb7bdf83dd1de18c0050b46cbc3ede9c78e34746ffde909ee7f160438. 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/UKZGC2407489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309808ec15e7df7a7f665c5959036fecf7733e16f1aaea186cffd88d44a57c9f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/UKZGC2407057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910c0c85713ee08a9d24eae50a97e2e0b81e331b91cdbc3a48f77f58cd7836ae. 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/UKZGC2407064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942efe7b32eebc7de8b11ef9254d1e1622ef9ded6454d8c2befc5bff7656583f. 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/USANG2203420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7f6c63d8aa17fe9fd84d2411e3e8eb4100d07060946f704f7f90eab0dfb8fe. 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/USANG2276991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c40a50dc20a6bf31f579b5f103f045eea5fdcbe37742971f58ba90f3361dd0. 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/QMANG2228929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9011f249ce0806e938a73dd3121d607b74bc6da31d261c19967ef0537f32cbc2. 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/NLX9G2200265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf518ed43c485e891020972be43397c528dd9c79acdcad34eeb05572c6e9731b2. 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/USANG2498976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d61066c7303947ec042cb27f2970237bd04547ecf7906508276428f0fea6c3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ATUM42100208.
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 0x82b0d32c3b792b8d8e312e99422d0441b73cbe2437d40b1e3ca69776887b0ad9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US3DF2405375.