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 0x5f646521ba0a646532c7ac84406d67836e4118d6b7903d566223809471d59a7b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5badee56-4857-48a5-a0dc-cf0f2a91141c.json and https://artists.proofprofile.net/proofs/artist/5badee56-4857-48a5-a0dc-cf0f2a91141c.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 0xf9fb85ccfe7d9f01b61d7356811ebc4f9e591b89c9d5744e85a9c26b1103c304. 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/QZFZ62384474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890fe77ed60cbf90b3645a22e44a2af4d6eb73859ba79b7771dd6e0bc45f0312. 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/QZFZ42272784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499fb82818f82ce61ec82ea1e79c97f0aec520623c55299991da64f918ee66cf. 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/QZK6J2185216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5835c88bfbf507249e78ee9ee629f9cdde0665629cf9e27862350b333dbc537. 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/QZK6J2185217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b4d62adfc5ae1d283aca9b024b460aaf89ba0a6577a57170d11d2c796faaa5. 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/QZK6J2185218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b05fc83d327e8ea26e4e28fca2cf80ac566f161b5aef95324c8ea5b8ad44e3. 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/QZK6J2185219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93791c6ec88b16b3b75b00478f7fea69cbd6488b834e001c2fc0e92e4ebd54f7. 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/QZK6J2185220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b435825d086956a71fb9d354cedcf030486d02c2fa6fe4fccf90aa6d588c663. 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/QZMER2071809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730a72132b9f6cb20382602de359e0e5473fbeb336909f3e266947af22cd9f33. 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/QZHN92073548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbb0344c2684053cd08fe57f931f75a43d793ba2454295a95cc16257b7fd511. 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/QZTAS2171289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28473ddf6e7b0a38ee0cb9dfb4ab0b81cacaf2ae64f2309b71706680e5e2122. 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/QZTAS2171292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3c0ef41eee6c7b2bfcd1f0ca5fbc5126bc50c35e4eaaf00a9c35d7d59ffa74. 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/QZTAS2171293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a9ca43be0fb5bae1e25dc4f79a41da54c3fd78baa154682218ede8cee43029. 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/QZTAS2171295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cf740f1e0423bd35f05c6a1a1f4dc99b54cc7c004a8ac10d74ae81c9e301bb. 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/QZTAT2151867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea0a9f8b279fff4dd3489affafcd285d302ed95d9f22c8bc5e9a230d76ef003. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZWFK2431528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa517f45bc9653b5d81d3f1aa711c9775d50f7162f757753c12bd1cff60ccad21. 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/QZES72340934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a00244b3aef876f569537510272abc2cfb140eba7c6538c33d45f406075acb. 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/QZTB42377151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023f971addc036eac3a0821c23a7f05c79be70f4ce4fc4940e0550afc16cc5da. 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/QZTB42377152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a0224f27961cf1c41e459e370cb320273ccff2cd7c6c3df1cbb7f7f9e9f305. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTB42377153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5d165397768de7eb1952684febb64549a089bbf38221d656d0cb92f1f54ae0. 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/TCAGD2266652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3646fec4f334803d402a44ee9521e50f85ab45e0a2ce8a953c69d7038e2866e4. 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/TCAFP2168708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35cb98c818b603b2dff12035befeceebf5a1e4a3576bca70ed1a04f9a85a8e5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHZ52157381.