thumb|A Greek cross (all arms of equal length) above a saltire, a cross whose limbs are slanted The cross is a geometrical figure consisting of two intersecting lines or bars, usually perpendicular t
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 0x8c89345fddf7bec1284be3675de2b91d9d1d1aa51bfaac76ca0c6f33b19f5a37. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9977782-3a67-493b-b3bf-619d9cf83565.json and https://artists.proofprofile.net/proofs/artist/c9977782-3a67-493b-b3bf-619d9cf83565.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Criminal Bassline Various Artists II - Mixed by Daniel Jaeger (DJ Mix)
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 0x840362ee7f9513475d59433f73b5e58d514e54c5bbc51e05759688349a113ba5. 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/US83Z2034050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeca269582be6902b55e2213d2b7ba1ec41966e04734b9b3aaf3968a500ee2f1. 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/US83Z2034056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c8a0a566d52f64f1161ebc8c5f7ccc114960005221c7a04d5095a96425fdde. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRDKW2108037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1298b5e175ee728273184db92c96e2c213c284ba06ef45ee8c20d21bf20a22. 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/US83Z2495263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3473547209782131cf539f268d8da4e1833d6abcf7aa56f3a7cd47db9d1eaa98. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US83Z2024564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59efbaf4ce92532eb248a1373a7b49b8affc04213df9ef61775f7a5ec740383d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:19:00Z), 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/US83Z2024565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98efff039414d49d3562939a34c49ff2adf015a595d1becb9645df250c72ed70. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US83Z2024570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430985c3a822d871c3b0c4b2e4380739712247efa198dd642adb475abf18614a. 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/US83Z2024572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3513425fb5a6f0bb81318e078bfaeaf9b6d4c41e2f82a07d395127093850c7. 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/US83Z2024573.
Ron Trent - Morning Fever (Cross Groove Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9055277d6860485cc04f4879193f6d34550de5f82311f58621521b38123aa51. 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/FRP621712030.
Nothing But... Fuego for the Terrace, Vol. 04
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ea491ff76f808ebf22095a774a28e8953781e56af992f1728f9419050e3ccb. 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/FRDKW2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dea742d02cec79e10c87bb88341c49b5b0eac77673f43a4cb8592431d813cb. 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/FRDKW2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4b686167b75dfe58658d7f18cef2bd3c0561c6dd55c4760a08ecc710e97d83. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:59:20Z), 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/FRDKW2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b99e4fc95f6d7952fd0955ab894a3761aaaab49bcb79e8205a4b760acdd74b. 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/FRDKW2203374.