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 0xb1321e114c24734ab7378b826afe4ed7b31b3ee190f7d54943a3c1e7f5bdcfa8. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88094aca-f79c-45ea-812a-7eb855033dcc.json and https://artists.proofprofile.net/proofs/artist/88094aca-f79c-45ea-812a-7eb855033dcc.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 0xecd8ff01059e2c36e95f31d35f2b013eb55c1e39e87186936c954c5aad2196dc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6K2598665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbe95d2ebc030dd87b1b4d06589905c7d49ad48169b6b00ecf7cc5a10080077. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:10:47Z), 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/QZK6F2521840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c966129d3eb6e31f899f3db92921b7433c0dd61178385e36f10d2d17a8e151. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZK6F2521841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea9af001972a743b9184ee5887c4069c54ea1cfbc7b34a2043f78a02e60064a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6F2521842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb930688ef95f35623934a935e8d0cea11dcce8658b97af4688bfe4a509f1deb0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6F2521843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8554a141926402d30fb2631bda891d81f7084b69e59d705cea87ed718e6ff62d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZK6F2521844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8424169a87b927ba302fd84b74eafede201ea1bbe05c629ff7d67ca00f4a30ec. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6F2521845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591333f69a47aa78af3bd40a6c78b770007942a6509f0e47b32b40ead1e08885. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6F2521846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681f538686e87c8b357a48fb68bce9821fe0b5284046835d6a0fcbe243a52155. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6F2521847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0941cac85f3f84ec9a892be2f2053930479ed28cd0666f532ebe9a0d33297205. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6F2521848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6837743f5f556b78847cf9ad74f9f412b222d3a41a376dcac32c4453f80db034. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6F2521849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cb0573fc205992a286c73e07ad42430babf3037eff2060bdb1b4416c419e17. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:35:29Z), 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/QZMEP2512492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d9e3c17fd4dd68f92e697284aebb8877902a4ff274e0285804ada044fd1ef1. 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/QZMEP2512496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c8864b5b3ee669d0b3e5d8dee9f250aa149e657324a86361188a2ce3dafb09. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEP2512498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeade872a47d7d7e8714ff7b8563b4b7d5a5b5eeb1b631f227fc32161b9ee5857. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:49:23Z), 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/QZMEP2512499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd7d5d7ae7f2086f241b949b2cf4f2d04211649b533cb069082e4232a6ffca6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEP2512501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54eb23d60b8f568f04729e8b06ec075d49951552633d148e9cdd4a1eb7375d9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEP2512502.