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 0x632c68088f1a2d14fc8d2f3528747ea3e78884709e3d32595a12cc1c0eef49a3. 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/abc068dd-33d4-4f1b-b8a4-3dfaeb0bb894.json and https://artists.proofprofile.net/proofs/artist/abc068dd-33d4-4f1b-b8a4-3dfaeb0bb894.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 0xe70f7499ac67b3f51d5cd6b22b37331aa152a8ac31ff1f2e33f996b23edc827c. 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/NOX8G2302037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340e8cdb00114ce9e8190fdc8fa299259ca61410ef4085afd098ad824f751f6d. 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/NOX8G2400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc9019951c0f18f8ad2bbfddf68d875664f1503bf9946d208601499f3b439d2. 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/USA2P2361086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e52bdac87fc15cefce9e8c6e826eee6a35e10a490892c276f6fe5a4b19730d2. 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/QZTBF2352509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ad6160f0cd238d5444c17c3cef07b945a4f77553a86813dbe9659f526c0ba9. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZTBF2352510.
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 0x9d1b221da64112ad790bba351ee8a3e45ce19af7d4b5ec9852521857c264eca3. 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/USA2P2421076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9608b51cad201f69dd5679ab19a6c010c624698a3f9357dfc352db56fd2371. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2421075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4459f7f68ef5b3542c712d5bb98b7a7493ddc19fe21c792ac4e3f600ebc36a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2421077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f0b82a8e2f39145063361afd69aaa34af9c4503d92db4f3a7264daef682077. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2421078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48043a495884b284a99606c36f8b7b5172d93967c04055d11c1f1cfc6e83ca60. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2421079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a68dbd3919b0bb4df07a88e2b86958724dafd158d8695d410cd17e843593ae. 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/NOX8G2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4485d192ab46ebeadb91e07a1b4ff211ed01fc8c1a57178810387503e2099359. 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/NOX8G2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3cbee0f50e4ec78de40bac32d51cf330b5ccb3085045ece3952862f0996227. 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/NOX8G2300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf233c98dcf93df081f2f441585341cd722960983aeff1ade44f5482693a7bfc1. 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/NOX8G2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6506beaac56fcb889f2800f8f9c59615d031e223f2bc2df5d3ffe78bef8161d8. 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/NOX8G2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958c330e04040c42c4813799e75968a9d51dd8731a4d81255acb7d0c561a16ec. 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/NOX8G2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a889bedaad3c81c7c63bd372fa44cbf0275a3829fd6e8b94d581b7567652b93. 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/NOX8G2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4747064db7a88e1d206c6de32da6977cc11ce9d58f306b9141756405136a653d. 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/USA2P2460324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd592cccd08207bef4bde386c0a6a94065a4f4a800c3b38b201f339648941e7. 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/USA2P2460325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbb3792adf99e81300fc9eafb5ef3de22c96e1b22175c734b6b74edb083619b. 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/USA2P2460326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc1e2fcb00424ef3bd91e0d7c4b18b932ad726bb20668c25ff4639c6c20d8d7. 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/USA2P2460327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34a186d6de1a3fbd5b16f12924fa1538b6d8df31d7bf2f1d7caf7f0a4c2a2b1. 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/USA2P2460328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a532bd4911911d335ac9eecd340725e755fa6b5550d20e4f6f517a5af81e107. 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/USA2P2460329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c632830a84b4ad0d9e41d7cfb8f9a189e2f9199b143e0abddec26b2511fcd53. 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/USA2P2460330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd761b393ca2a6bb2f7804831f3cefaeab554298e8e132b53b31747226bde0f. 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/QZTAS2493962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54ac36e2d08e1e1708a2935d0df6df1957ec29db81828b019fc9ad9b2df6465. 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/QZRP52447167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3563a8154591f4a5aa6a91c644d88693504beb57b3943c1606d2b1bb3cd3f43f. 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/QZWFG2361967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5e1104231cf67836c8b6253e59763f759c52972da698bc3d1319944d01b0b2. 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/QZTB22381552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a52c5900df4448943f52e00b44a6b5b89b639fe5a630ed9934584f49c3dd1e. 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/QZTBF2449349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74d51fc45738f1ed4ad004c4995c27810468ad046d209d7db8823a91d1ee881. 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/QZTAY2331951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2578ccd2fd5f5897fa198c4ac2f86d74f14ef0f488c82321339a199fbdb601a. 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/QZK6P2446937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072c9bcb597d7a8a9169df07577e3da969a5141c31ecdbd7531c48b1dab31784. 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/QZK6P2431397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc99354cc83af7834e56880c1543f11f54ed03ce64128e4f367b719a03b104c0. 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/QZK6P2446939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd372a07c1ccb793f30461a2fe1419ea6efe3679fed9b91308debd60ac0e57383. 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/QZK6P2446940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c697ab5161dad66eb4630fb77a5b078f358f87994d5e18c8b990051aaef15c. 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/QZK6P2446941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaaa759c5d66b32a339bd699832cb6a7b56d9283b9b0ac5caa04c2ab72341825. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZK6P2446938.