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 0x2c451d5632cd9dbc8d0e1f2cf075422121896abac7b0ba46e827781c57224ffe. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/914f71a5-dfd8-4d28-9575-56e72eefc560.json and https://artists.proofprofile.net/proofs/artist/914f71a5-dfd8-4d28-9575-56e72eefc560.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 0xc57a220a61c1d5612b1eae36fa918f392a2d103473d71c3a7c6b00574140e919. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZNWS2492196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b78411a19a4ac7208a6131ea2f0d5596b21a955cf0e091994a79d8cf300147. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:00:06Z), 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/QZNWS2492188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772dafca051ae551e4d4a1077353da7005c0ea2fcd619a4b0ca71587d8cce415. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZNWS2495760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd151ef5ec5babb328372abe130ee46da045498ae8b9e9e8a433ce88dbe58e55a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWS2492191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2414749def94e9e58731cc60721bbc90ca667be28edaa21328e6cafa0baf1529. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNWV2483494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71368d8e8a2c2d78dd329d15c2065c74330b9985bca8e3f97526f97fe92a8792. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWV2485080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5952f69077ab56ee010a46cbff0bddcea02c6df8f422bb07c3ef3c85e6f267. 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/TCAKA2514952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c962f72cf400c656a4b143981388175c231da0937b08583e5c0aa0db373283. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:02:22Z), 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/TCAKA2514829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b7218dc26af4107b646a2722d53742f9de1939ae69967d8f01a4a5e4380f60. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAKA2514978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44986fa30628e051fe9a325b79f14e1fa98c51f8ebc6d1f290c87800ae88429c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAKA2515031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3e2e6e708533ed967d1f0c65ea227733ec7b90643d7a4a0b1fe141b21bf7eb. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT65W2575562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07e23be2705dff9491ea2f73064e6f377616f0d8700ea501e455924e9d33b78. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT65W2575475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd813bc114c0a84aaa17b76716b8bd48b8cc8739e942058035e3de8c4d072691b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT65W2575619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960dc9f90d3f00a17ad6592f71c25385064c41fd615baa1fec8678290eaba170. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT65W2575575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5845f3a834b3c1d8ebc08c9590d30fd1681d6d6ea16fed33a7533974e4283b0e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT65W2575632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04ceacb51229defced7c7a173cb0af638a1305a568cf4b65ee900edd6e5fa9f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT65W2575697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61acebb0d56f8e280f16f61a2db9cf367fe81772b225ebf1852f9a93aa1fc45b. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT65W2575722.