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 0x6bd9dc2e55505a1c3efa1802e8287bdc502aeb1378342ebf3a68a75c25acc2f1. 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/d6a26366-3ffa-4d35-bd59-95ed1ccb3280.json and https://artists.proofprofile.net/proofs/artist/d6a26366-3ffa-4d35-bd59-95ed1ccb3280.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 0xb3235076525907d298166822b443e89ba26967ff23638ef5a7b0d110453cb761. 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/QZTPX2331558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9c041e1560e41387871397d76b374a79e98b9b7b91fbf0fd50409778d98cac. 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/QZMZ92462339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8287fc4d58521068f42e95040e11021c4850c7bac898e9c040c3b859fed2af01. 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/QZMZ92462340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafa3e8d93c47f11dc8fdba3896d08726e10117105502041416a98333a308b6c. 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/QZMZ92436429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19781e191e36d5253df12287efc6f4b5fa3073f9d8147c99919457470b3dc815. 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/QZGLS2475925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aade1277cbad2af0b13fafbc6e8b997fbf9c972fa2668405df6120dd53f3ac7. 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/QZGLS2475926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bdd2f3e6d615663845a25a9e850b638cd6cd059ba435d8ca7bc459877e98c4. 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/QZGLS2404095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4742e91d6015e4ece2d900b44d3551f49b4797b9bdeac87c5771bf4ae1a6834d. 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/QZGLM2463315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2989b94dc7148e0ea365fda5f3097b015d0bb55f73e96baab37f8398dfb9bed. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ5AB2484855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64556ba604e65570da2a187a2472a7e2db26b0268cada54e0f51fd8821174ce. 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/QZ5AB2481512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b9150c98991f92048d8547351516249f537088ab438058868fbc7a1548bdff. 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/US7VG2490520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129634f12e6cf9f586821624e51e8a8fb27c2dd3f56a3dfe32b606151acd9fa3. 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/QZW9L2311698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339d148a10842c5e7f3c965031abf7469c70e9e3ec46ca5fd78588cade903bb4. 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/QMBZ92036970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015ec59f093f128c4385095d414867044a12df0730aeb8d1dfa9b06418db813f. 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/QMBZ92014644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7e7ae958f5df0ca92688168644677d9b6e6f133ceabcbb7d33a1e851bb90a0. 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/QMBZ92014645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3d753af11a9a750b0ed475cbc651f982cc17c3d9acb166c193bad57954d97c. 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/QM7282071088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1840bd407273e8364c64e966a61426841bd64e18653c790b1e20369b290a2b74. 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/QM7282071089.