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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ce30962de260bd2cab0deada795484e5bb73c47a8c58678be8d06fd818bd23. 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/d39f801f-abc8-4a01-9816-f4224671c040.json and https://artists.proofprofile.net/proofs/artist/d39f801f-abc8-4a01-9816-f4224671c040.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0347a2f7f54c2dae1765b36f44c727a9afe52f892eacc9561917119c5821a37. 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/TWAN78070125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db8593df611c3731086aec334b76b9d52bb22386b5f719a7bd3894bdbcd13c0. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TWAN78070126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9462aebdf033a2b6af05022a99858620b0c6f7a51b4527a140274ac0bb1a225e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TWAN78070127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea753e95a306ebd4aece819672a54f1a30e21ad969f9e6b93d1ae19a3012334e. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/TWAN78070128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625d211f17818b91aa613eb839deb3d3f77460d9cea6fcc04dd51f30d1d6ab68. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TWAN78070130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5a863854db9633c87c3decf1d48b14c797df4957c99d1b917533196f8f8d7f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TWAN78070131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de82ddb3f6459752f44b7cbb3bc2759b58bb3cfdbd7f06b6255e1a8dc1bf419. 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/TWAN78070133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdafac4f8a9ddf0d7ed3320ca0cae8f74bbc5453ada6a8736844cda1618d10c. 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/TWAN78070135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184b2610326dac3c1a7fd47c646474b6731b6c0c37a53a89dcc083e3491f34e4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TWAN70870031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e317830ca97416c6fb071e3566311bef4f4ebb4e4063db806544b436cb66a59. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TWAN70870032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dbc530544d9bd2d3bab8d85f5b045622edf02a54a8c6c0bf061b010e5fc152. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TWAN70870034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea1edb9cb714dbec70bd5c6fb59ecc950dcd4a55939396c383d23f6ac4b872c. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/TWAN70870038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c0f0b49796d5c0f8176dd350abe20e6c3515cb69cb93150f91a1e3348731e6. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TWAN70870039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5785f4bcc42d6ca6940417db38f097b6715ee961df26bc60ae0e54e3673513c. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/TWAN70870042.
台北今夜冷清清 (KTV男女情歌香檳對唱 5)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c90147ca734ed24b89f3716fd56f789dadfd30eec3acb19661a4bf82b0c9f5. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TWAN79070119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb2d10fcd27ee32e5121c3dd4714b4b2f688205de4e767adfea8a5b13dbc138. 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/TWAN78070113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9757507419eb13579d253f2d1a710c7acc66797f1639289f239f3bf0d4055c. 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/TWAN78070115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af4adc5e50b9b2e767797e5dc05451d673310c86564c32d788ff5bbf0a9eca9. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/TWAN78070117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c03a667dbc187d74b60e1969aca2f790dbcdd8306709a6570178d3d63366f9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TWAN78070118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd183f09dbc7481a9faba51805df97a33e7832b649a2e0cf8063081a3c6726c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TWAN78070119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745598cb14a607312a9c06b1d714a241c13b0e42d9ff823d29ebd4e3ab3db336. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TWAN78070121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7e996c25049e1237b2941b26bfbb48ecf3c20038ce780ba8fb7ee4e8d2460c. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/TWAN78070122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4d25d21a3631f5705f52a2967bf681b751718bc8132f97c81e70501f11f111. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TWAN78070124.
愛你一萬年 (香檳派對國語老歌對唱 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f4ca175debc76282f90fa84a31b7eeed5dbbad419af68e478db49e6cc94237. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TWAN79070130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d4c13ea2f5fd73a4d22c27961e876fee044c1d71a9e29d01ac959d0d2ef566. 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/TWAN78070138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea632b5add29bfd1613300f7447a8244872ba33e727227e3f3528b360c083ca2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TWAN78070140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fd2dbb842ef3c0f64ee27681225c5b6452a2d0578df7fa8d488119b2c6ab55. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TWAN78070141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a561154c8db8406ddbda077f83d63ff888daf889cb64c5a0ac156f7c749a93. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TWAN78070142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa853083456a7ce66e874def65e557d29b8580bf33cea3061d83c383691c5d003. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TWAN78070143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5bf1049820f8125801c917be57e972e74d4d23cee686111d9f93416db708c2. 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/TWAN78070144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab9c35d8300f1886dc853d273261d40dce8db7e4edfbcbf0317cda5cd5a9987. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TWAN78070145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee1fd244e1061e28bc7583b3d82ee07ba420f9edf241bd9393c537c03a72833. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TWAN78070148.