thumb|upright=1.25|Man with a shield throwing a javelin thumb|upright|Javelin thrower. Bronze, Laconian style, third quarter of the 6th century BC A javelin is a light spear designed primarily to be
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 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 0x48c3aa397cd70442f4dc60d2a5bf1fae68fff625d09dfdb04d66304d2530edf5. 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/f9d59de2-c0b4-4fbc-8dff-ebd6765a36f1.json and https://artists.proofprofile.net/proofs/artist/f9d59de2-c0b4-4fbc-8dff-ebd6765a36f1.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 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 0xfcbc5c6825af1d3fe5f7d4a9e0f4444d7e27e8a5513d8d5fba5211152e6b6527. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USLB11210040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d03b87deb292d5919fc9c42434935c46aeb0fc7e1aeea10d78225a5bba5fd3. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/USLB11210042.
Wenn Nach Dem Saufen Der Durchfall Kommt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951aac8151bd712bd4f02faa055e1def235e7cb7fc23ae052db04dc6fbd77354. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USLB11010025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3428cdba19f7dd9b0738f53492277fa4b705ca3e2ec5e7b19f24916d36d0a69. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/USLB11010026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc52ddd922f50771a295e8d703f859e0e16b6f5977762dc71b02654f81ebecb. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USLB11010035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd4e97d094b9520bbf4d4f7c287dadccdfe1a0816005befc967f55604fe3d72. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USLB11010021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951aac8151bd712bd4f02faa055e1def235e7cb7fc23ae052db04dc6fbd77354. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USLB11010025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc52ddd922f50771a295e8d703f859e0e16b6f5977762dc71b02654f81ebecb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USLB11010035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a7d166f3e503258b78a697d5a41528e43f1b8451e267fe9924a109a7f3f889. 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/USLB11110041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dc7c4d352c02679a9f6e01260ee2c700b2bf955e1a73e2bad964a3b78cc5b4. 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/USLB11110040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122a9a32181cd426236d35110e5e24cf8914099873becd6dddb78c9c3f814a6c. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/USLB11110043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08607c23ae4611f30b51fe16e0dbde2b9a624ef57673c88cb39405788909312a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USLB11110047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb964f7c265e45f68e42574aa0f20935a0f13511293b2197dafd1b2c504819f96. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USLB11110048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42de44a5e3a72497700a9c941e2f8516df07d2ec54e7820573e591f85e4357f4. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/USLB11110049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94065ae0d327de050f55b3bfd5085e959006259a285d05516e2fef9e415f5563. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/USLB11310003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1dac841b35f3fedc3536fcc1b8f7fc3d0c4885269bf10a0c81a3c36e636bc6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USLB11310000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94065ae0d327de050f55b3bfd5085e959006259a285d05516e2fef9e415f5563. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USLB11310003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deb616794a8e2813d960c6da0d3f8768c789e466abd87fc7e00d3a8273df0fe. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZH5R2000155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1490dfed7a218254de183a66dab9571286ed742a068a7c1a681461f018b8f2ce. 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/USLB11410086.