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 0x2d0d89ae66c06097824b2289f7f8bb15df28b7b707a0d08fcbfe9a1cbb7e0e3f. 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/c63f2c38-2566-4800-a300-1384c2a91b5f.json and https://artists.proofprofile.net/proofs/artist/c63f2c38-2566-4800-a300-1384c2a91b5f.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 0x3da62acbd02d92f96fc0a87bd0e909ae05decfa8076b19ee999223ed22873d9e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWZ2184926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb77b43b72287fa79d019295ad39c4de32db406a3c8db912de42ae3bd356d46b. 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/QZNWX2148875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686ae725bf1cafb9700a7c2849a1f80a84a78a32e45995ea266f0b6963b8eaee. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:07:34Z), 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/QZES62241273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2865ce9e4febe0b661b8ed6069709522b0968bb4e7d08f633659b014839589cf. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:17:39Z), 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/QZFYX2319919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3522ac402b2736a3e4021527bfd2660445f5a30ad5b6550ebc3a5dec1e59f69b. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZWFS2463548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303fa2bd5e33bc55712cc89cc5eca10380c955c5343909528c158882f42f3986. 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/QZTB42565383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d92503e92c48e187b3d489e6aac986455ee6ef1fd6a23313608b450781ba65. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB42565386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bf57d9d8b7c3e62b1c31f78ef30cbdc63bf76315e2140465897e3064039e6b. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:23:32Z), 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/QZTB42565388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d5019a067e92d6465ec4b500a546ebd3717b25b99badc5857b13a55d338d26. 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/QZTB42565390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf76fb11bcac82d286cb6d0566a5d08fc5b3d2075a552ed1fdbb2d0e6d7d3c5. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZTB42565392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3655d536b6d12671aaba4de9cc9d62f7c62fefe8bab4c7949e265403fcc44627. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ782534218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29225ab8021ac5e0b7e0d672b623288136f9f859111e4ca7f4e2265849def28. 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/QZNWS2409959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6dec632f578db14876a14527a1336d40d17b78b11f6598ed0fe3ccc64b8b2a. 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/QM3DF2417617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6dec632f578db14876a14527a1336d40d17b78b11f6598ed0fe3ccc64b8b2a. 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/QM3DF2417617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2eb109dc8891b4d426a0e81fe7a5b398b9c12c1e2bcde822c2fbf856987f4f. 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/US3DF2549816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cdb5bd832372625729428a3fafe2717881f2af456d8e865e1157c8b4f17bd7. 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/BK4DA2437642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f9b38ff9091e11b01dd50f2c5a0dc4dc40e4142b62f5103c3940fab67817db. 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/BK4DA2424661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d1fa04e1edbb7c6f1dcc5add93f4fa50f553e7b4c9342d865f2578a1fe8815. 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/BK4DA2416786.