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 0xbd65814c50a85fc23bed5214ae7697dfbb7aafefd8ce738ba72709cbe450c01e. 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/1f524aa5-2b4b-4efb-a882-dcbc8d567cc4.json and https://artists.proofprofile.net/proofs/artist/1f524aa5-2b4b-4efb-a882-dcbc8d567cc4.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 0x3db7302fd45d09d68507fc40b805bf4f17750c469ed2598a0c7b03625178c8cd. 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/IT4OS1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe199c7c1ab73f691cbc1f1edbc4e1f9807b830413ad670ba24f2ecced74ebca. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IT4OS1800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bc16cd3a760de12015879900d587c99069d1f5436e4ad5e0bb95c057cbab98. 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/IT4OS1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838509f578dcd590daa99813a4f2d4189a320f5a0aa2b9dd442d79ce47081977. 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/IT4OS1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac594bef458677e5e5bb54ecc04507023e5c48129e4bcac6787e2c2a866afec6. 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/IT4OS1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db56a5088a2087d8c704cdaa58a33e917e79cff5b5bca23966e466a3a15b338. 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/IT4OS1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d4b93ddd477c89b6528e74fac7378b864fef2f999d90dbec37dce31b4979b7. 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/IT4OS1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a736dae968f9d83c11458c65298003a1e4bc70bf89a22d89bee777d824eede. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IT4OS1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f91acc7cfb67a8e1a5ef2cd37176ce475dea674795d894399c59b53a5ca3993. 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/IT4OS1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc5e3bd39244e3e228b0228a64f8fbe7fd89c3799ec954f611926edf6c3e496. 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/IT4OS1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d145c3a99b6cdea913545f606691cd2ebf9df55f9b0668ea4f92c23bbe7a6c. 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/IT4OS1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96f30a3677052dd6c34e98717f53967e8f25e076bd89a1eb8039c4fdb15777d. 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/IT4OS1800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea223a656696bc1e8224136de821ce98cc8e8f7d4b24b32e4dea27182e16ec39. 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/IT4OS1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838509f578dcd590daa99813a4f2d4189a320f5a0aa2b9dd442d79ce47081977. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/IT4OS1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe199c7c1ab73f691cbc1f1edbc4e1f9807b830413ad670ba24f2ecced74ebca. 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/IT4OS1800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96f30a3677052dd6c34e98717f53967e8f25e076bd89a1eb8039c4fdb15777d. 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/IT4OS1800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a736dae968f9d83c11458c65298003a1e4bc70bf89a22d89bee777d824eede. 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/IT4OS1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d145c3a99b6cdea913545f606691cd2ebf9df55f9b0668ea4f92c23bbe7a6c. 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/IT4OS1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a624dff3601d53ede70d27c153925f6109b3e84bed9a1aedefcf87581d257e. 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/ITJ792000016.