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 0xa6b5b9ceda6aec4c8db51ab8f88e9e02bfcf7376cbd038a45502a2702cb867bf. 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/f8a369fd-906e-4473-92e7-494fcdd68b78.json and https://artists.proofprofile.net/proofs/artist/f8a369fd-906e-4473-92e7-494fcdd68b78.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 0x0e00ecbd35dc9b52662157106a4c1edac805e804037e02062bc96d1736330bbf. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:37Z), 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/COA9Y2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2895d7e56d13977c23fdb0ebeabefbd1a6a78fc5a8ef7618596c6967e386e0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/COA9Y2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e00ecbd35dc9b52662157106a4c1edac805e804037e02062bc96d1736330bbf. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:07:22Z), 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/COA9Y2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d60c33087000cfb8052ef46a356ea2cfea0959e5e872555720468ffcf502f7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/COA9Y2100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491defb01da46b3988a147179fa19b170fe2660328f55987831af70351931f9d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZGLM2523631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518c6b29ad317ada02b2e2eaf2d5621b1f740990dacf5a21f22e1ccb60326ee3. 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/QZGLS2555322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3509cff4b05ac020d48c3569f7b1bb3b8f23e5dd519575ef87ab7dbb1f9ef142. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:21:16Z), 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/QZMZ92590366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecefd41eb1aaa3d43e3323d9b2b8ed425fa639dda8aef77543326acb0aae1fd. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:01:23Z), 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/QZMZ92590367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8535c99f390d0f46f0c9c741b253062727aaee7e916237bb1a1e4a9988122dad. 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/QZMZ92590369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7e0cd5cefe08bd4ca8dbf032b1d9aa42a8ce56fa494aebf76c8cdb060c4282. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZMZ92590370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56aeb9e706d86e5ec3b2ba6f28e42e036c11908dd3bbdfd0b90666727247f702. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZNJZ2589903.