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 0xf3678e507a4e6fecc095e89923ec3abeac6845dee03c224e062cf53be1366e7e. 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/a73ef826-d00b-4b52-ace3-c5decaf005fe.json and https://artists.proofprofile.net/proofs/artist/a73ef826-d00b-4b52-ace3-c5decaf005fe.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 0x67be7941fb699a0cbe1b744dfad9295113ca35bc0321c2829871049269458613. 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/US3DF2466322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32def0e3a821175355a7461ed898a6574fb46168ae180715c4d19aea8607026b. 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/QM4TW2472782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645c795819069171b42ec76bc149ca92f9434d5eb7e559ee8de9393ea4441ca7. 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/QZTB32381558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43da43778f2031cf076c3f66d5cd356d2d0f5dac5f4290c23d0dd888262593b3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB32381559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afe007cdba2ae6ebb92145ba49cd174deef706c486f8a7088f000769c0a7b16. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB32381560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00cc9b6f09cd73c4f752c9d70a741bfaeb7757dc9890379d7e9ebbdab4cab9b. 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/CA5KR2384138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e3df6272cf0503b27b51c15c0af2d314ef9a29a9ee9d40a3df1e6ed1de9997. 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/CA5KR2380288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e3df6272cf0503b27b51c15c0af2d314ef9a29a9ee9d40a3df1e6ed1de9997. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/CA5KR2380288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5257bf57829697abcef0875af614af957be34224cbc2f1d0a20c6f788e27c13d. 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/CA5KR2369973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cff0e64b0e9945153b5cd681456dfbf742e6ae335ad451abf47e6440bcb4802. 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/CA5KR2370161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe194323f33bcccd058bdeb9972f3b8cd3ed2892705da0c3d07ad21ccce3c347c. 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/TCAHA2352165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f2cddeb337330dd1d68bcb883166530ff45d0f66c83c82cf241842331a564d. 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/TCAGY2353822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4ee6795ccf27f2c4eba891cf5f65410d5130943c608d20b28e20af058178d7. 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/TCAGX2388588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dbdef16e7c1e5219c0cf42a1476fb736eb7c4d554607838fccfb02e2949f58. 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/TCAGT2377478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2cd82a9541778029d628ce0d693cf1104f60d0a8446bd0806f255c098373fe. 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/TCAGS2372919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d686d42045ced73af65e355930f789ce641dce0a94d10966810a86b2976f9b9. 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/TCAGN2299807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15beede1e8f3686dd103373d963e17e1393ba96450ddb8f0bc44578dc7b443e9. 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/TCAGL2241177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317a3b8e5c32029f7268c91a1520f424feff86825837b9a02e5259c385084c25. 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/TCAGK2203788.