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 0x736fcf285b607ece1c430c131cf26fa69fdb459a338723255b4196ce80644d4c. 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/ed4644d6-8409-443f-80d9-d1a3cadeaea1.json and https://artists.proofprofile.net/proofs/artist/ed4644d6-8409-443f-80d9-d1a3cadeaea1.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 0x88b1fc8cc90762da7f35794c0682414b527c7a9a570bec5d2efc2d9f3fc6f209. 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/QZK6H2014698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba4ee07ba8ceb0b9bb91ccba19a76bb392b456f9f22671a19c09e5b6bf6a9cf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IDA832206355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c13b756c3d72a064d1e61e7596db151640ebbf14966f156ec75e27b1402cda7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NZPB12301470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81b1ac929badc37030ebc67ebb9d4f96b5d0e253e0bba2f8190ac2ba21da79c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:47:59Z), 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/IDA832206929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40580e620bd5b940e0b4a55c9e6843be3039cce0e83702a5f4b25f6b595276e1. 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/IDA832207509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb8852471493ce4a8e429d22a150f4b522e9f8e57f8d94d31ca682a4541be71. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/NZPB12301469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89de87e8fb8cfbef81457653e4de859e8bb22d2ffb85390c36fab2f70596fadb. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/NZPB12301863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d7a2f2a174a5527fbbdae01571c0494d9055986dbb217c4e6656f5d4d7524a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/NZPB12303552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3d33e8f59942298ce32e7e5c8a0a20febaf92c6c8b414af9e81f1f362f966a. 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/NZPB12403387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30cdb1f16ea2f4e20e4f402a58c27309eeb3bead1c12602e02c701801c09a33. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUG0H2401200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f099019d203d0a44634b367558be15da4f2956729119dd06a0fee757dd0d55c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AUG0H2401201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33da41756cd36fecd4da0f5da775344404271857dc6b8d757e07e3bf88193c59. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AUG0H2501095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f84ae526da537f652f664d41f78e2443ed84344ad5bdc1b7b8b19a5549d47d7. 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/AUG0H2501283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d381cc437118afb40a754f1e07fb7d8686d336c45f1825bef8020abe23ee1a8. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/AUG0H2501382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9629a98390ebba6de57b05af668ce317a69cddaea02dd4c47c1d7f32d1f7ce6. 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/NZPB12401224.