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 0x06a99bb063b0bb5d49eda95c33090ee536616825c2da30d9f2f9fe71d16c6f4c. 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/8971adb4-6243-4edb-a835-c1e6e4eeae08.json and https://artists.proofprofile.net/proofs/artist/8971adb4-6243-4edb-a835-c1e6e4eeae08.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 0x8c9b95b674a6900458d63c749d4a7b8394ca13f28444ff96c8bfa617745ac640. 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/QZDQH2140348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f396586fef8c7a78f1f33326c53a35698298e36c360838f54a88746fc05d0a2. 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/QZDQH2140350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9229f43771cb57814fb0a44dee942d9991a6c779c5e3186d5e574df9fab746d. 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/QZDQH2140351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcf5ca16f57fb3de2d8f48db475fc3e329f5f7ec0a52859d075716f94872d3e. 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/QZDQH2140352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88316920ad05ba615f58e9b9173fe856157224b26975ee8ea9696ab372a77e2c. 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/QZDQH2140353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097c07d212e24469b409c2ad684c9b29346056b260704245f2565e25a37be803. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZDQH2140349.
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 0x920981d8b97f56c1bfc962bd79ee4d4bf4bfa575289b85bb6f44d9a1088ef76f. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZDQH2140354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51b10927c86f35f06cce76ca10087772647f69c3dbcb64b9630549ea3691559. 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/QZDQH1908776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c4c32c981b5cb0af3a41fa2b7aff2a57dcd436555e9af0bde74cf806c9f948. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZDQH1908766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd645afb9a033c157f1cf20011afb9ba47461c51467d2cedff7da115348c772. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZDQH1908769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f4ba187239d99808ee3103c12d3b505776abd7cae1a0da094e846c6fa91677. 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/MX2831905677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb939f094486d239d4bfb4bafb35dae637d429e0cf547b64aa6047800d63f116. 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/MX2831905685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66855570294ebfcb5516f7ea476fbe9605074af71a30c340b1d8be551d2b92f7. 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/MX2831905689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8d736fc8bd5ed9168b2cd80d1e6dc1fad86e0331f3919000f2ad451447eb6d. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/USE7D1100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96ad97b07a17677752f9c3c0ded372c3e1d4669cdd15ed5533b8cde77cddd07. 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/USE7D1100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0d4784f2941eea421883568752a0ca6a73c95a5c5dbafad5f5320a387812c8. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USE7D1100165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97ee215b16affce94a53a656e5ca004efb007b0512a4852c1163fbf75b2f55d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USE7D1100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864b1373c912a5eee990a3b6e994ac08b73d1675a92a0f0edbcd74c77f4dc138. 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/QZDQH1905806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74bf388f0fc90ad3f031a3cd0da49f81f0c17f5d670acb3191de91da8a649c6. 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/QZDQH1904454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001f32f0d0959253327a73ee893fa90a799d5cf864e9eb5f455d8c1c5ed201eb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDQH1904453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb1b65d1146bab95e10f1362abfd90cf4385243b202106f561fbdb5b2ed80fa. 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/QZDQH1904452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee97fc26b8a85da5d0c0a99553c23ff837d37a416dd050dc27064f54a9c65ab. 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/QZDQH1903990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa142b83e746ba12cd1e49c278bfbe4e339bbe9bca1bb924274b2bb566dc08bd8. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZDQH1904153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b025dfc3484c78221efbae736f468620f79831371ce098024e10ca4ea2779a. 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/QZDQH1904139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86361e6bfbd3bbe771f4ba68db53994aca14295568dbcb44da1e838e7972716a. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QZDQH1903728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb123369012a2d805ad9fe2d276c308c4485581ab8c22532b393a281124c506f6. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZES82068509.