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 0x20752ed12a1297deddf3c1a1ac8925b0e64a6c02af316b3e3ee2212093321449. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b07ede84-a320-4a0b-a495-c168dbd57853.json and https://artists.proofprofile.net/proofs/artist/b07ede84-a320-4a0b-a495-c168dbd57853.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 0xa3dd19c252219bbb81fab06f82cee484d503211b05cd4b42b5d6d7142205088c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:44:48Z), 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/TWF712200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e541bb0e1e74edf66230d6eaf91811ec0470244c6576b561540926890a40f57. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TWF712200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68de6bb5557cf44b07996b928ed658300aeed40e61f258151a7feff49a579129. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TWF712300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394df957911494b1804551e90aed1d60f26dffbefa147ca5811a283b8cd69fe2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TWF712300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2712ab67277c2f7f21a9a811c3e653cd13ad3c466447e00dc7b29a9d232859. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TWF712300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97152bf71be82171626ae645e847bfcc460158d1067996f0e710376950ecc8a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:31:24Z), 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/TWF712400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394df957911494b1804551e90aed1d60f26dffbefa147ca5811a283b8cd69fe2. 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/TWF712300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2712ab67277c2f7f21a9a811c3e653cd13ad3c466447e00dc7b29a9d232859. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TWF712300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd017edc1e0ab2e5854a5cf6cbdd21b5ef13337a06976cf9daabb879e014cdeca. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TWF712300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68de6bb5557cf44b07996b928ed658300aeed40e61f258151a7feff49a579129. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:29:42Z), 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/TWF712300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dd19c252219bbb81fab06f82cee484d503211b05cd4b42b5d6d7142205088c. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TWF712200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2457eb77d6a0d981df44aa6aaf1c60f41c387061299139dd0f208585711df64. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TWF712400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35198c84e53e5b797996d861a9a3f0a5f8b25821f80337c9d495081cdaa62ea. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TWF712400077.