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 0xf0911f052d64f8aacef97a8b63a2012f74d92669f4dad87b6b591bd1eaa19685. 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/e6321ff4-c1a9-4ae5-aaa4-f4311c23a12a.json and https://artists.proofprofile.net/proofs/artist/e6321ff4-c1a9-4ae5-aaa4-f4311c23a12a.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 0x54a9c0c9fd593ddc9884aff1e914963afff0cb2db4c0781ecd9c3bd6baf960c4. 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/QZES92284058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf735686bb0eb0d9fb7fd342b24abe899e66d6e30d581b9d0134b43b903a11940. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:05:32Z), 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/QZHNA2217835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12274d3fd3bc7fb274d652be445ed1e42dbbaa1f3517c41ab98f2c816b1044c1. 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/QZMEM2253638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb56864eb56f7063c0d7746ba73e20c58373462878148f3f2a1ae44856fdf207. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWR2232995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6fc69931961559ad4d3ec9b6630c584b0d37ae478e922a5dc3de1ea6166b60. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZHN32371982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03da209b671368654271e563ce001928c4a885b98c65a7c83ba5f5ea2b4ee87. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFYZ2412408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ead7bf22e8f7573590293e351f5528b9486a11e23468c889d3fffdc60c149aa. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:35:02Z), 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/QZFYZ2412411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a19b671fed59ca3269bce21342976c7f1e5f115c5e141c297dcbc9526ffac5e. 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/QZHNB2405605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b56293174e756224f367af7692051ceb22643137d382b51aa1857fc8164cbc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:38:11Z), 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/QZTAZ2476309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee8253779597fb90c1da093c9c2c4f1ca4b89274eab080ba97aded0289d5d5a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:47:25Z), 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/QZTBF2475680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef02a87f51cd493fcfad77eb148f0086e394724a560c7df4fe11063216b866f2. 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/QZZ772482875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cb2437632ca1711866ae7ec36ee0b213c9a0ce930518849e8b8e4ba7874e28. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:26:42Z), 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/QZDA52572727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffe742194cbeeced1e583e7856a6ffef77297dd220e881d13187d890118f700. 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/QZZ7U2571324.