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 0x56b3faed9ea0dc38e434f5d146c9c3060ecc7bf265ac7251f7b581d065aa8c05. 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/e18e38f9-99bd-49ec-a9c8-cf6a5b3017bc.json and https://artists.proofprofile.net/proofs/artist/e18e38f9-99bd-49ec-a9c8-cf6a5b3017bc.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 0x3ec57cd29477dcf6d1d66503f912a58ec6319cff76e22b271ddf21d6c94f1c2d. 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/TWI451700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3c23574a1df43f1b06845d88eb4d6d72aa2b98bf5fe4de2484933ff4296a4d. 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/TWI451700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4b9977e41bcd584c3010cae885f577f6063c0c71409ca92177b89bf5c718f7. 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/TWI451700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb343de967f06676bc27654ecfc64befdc3b0a30778edcd6f177223d50603300f. 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/TWI451700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b810b9026ce4ff6067a935ccd96e63bc75a50864800b2242a2cc38da0e84fbe. 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/TWI451700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6e8eb4f9cccd0ffcf4de768e1071d5358a4d432108b79208f26830c2182007. 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/TWI451700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389fba7467af09fd5fc22cd60ccba47afdfd9196dbcadccfe3d15eaa7d426849. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWI451700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea3e2d248cd3d510542cb387c3a730a67e87c906d9d4d99779a29614cdda16d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWI451700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ba5078becd3ad1e8606925832ed2b250a057fbb087244c0e8c304059812ea8. 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/TWI451700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49d1471e356659469dbc5f68ca8cc8da2b24f696bd8cdafc71509bb96722ddd. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TWI451700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079a484ef0bd31ae165033d63422fc4fc8a121e9ba0ec3126decd1ae0d90f995. 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/TWI451700040.
顏社煮場秀: 夜貓組 Live at VG The Seafood Bar Taipei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92044175b7f11845329b69ec37ca449f3456a2efb82fc06c1a8f4be742abd5f. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/TWI452100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c31b23c1d512ba58ff8391c8ff2a27ee9bfc5b88f346c31ef059bfae099e24. 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/TWI452100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41892649bd4a915ea9962e8f9f2fa7e8f78616eb771163610b80097648d22e5. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/TWI452100033.
Hide & Seek - Cook the Vibe Version (with 李權哲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d75b3609612dad52c45e40c9e36514c5aeefd7bfcad06810297aca3e55be19. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWI452100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f637e35327609d85c734f96f5fe8d5371da537ae991434150591881c2bb258. 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/TWI452100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b90ccbf78cb089b9c8ccd8c1bf0d3ff8ddc30b2aa1fcecb93c2b51cd71a0f3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TWI452100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5976c6ef7a35b5e86c725276223667f6c47afc3db0da878f2c81cdb32d7ee0c0. 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/TWI452100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc3b98e4be6f5d6a7433ceccfa938828e1557e30a6e3fc12bb1b15dbe21e356. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWI452400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85278f07dc2a74ed759005737598ba4e7d9499724383df2005cfca9fc312fa25. 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/TWI452400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c70b2cb857365dacfea4f5b4eadae1be6090dc2ec50395949ea8d4ae282487. 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/TWI452400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc939d3a454c9d29c4151efa4cd2bedbda31ad3f3d1ce30448f589c2a7bdf965b. 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/TWI452400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0542fc9ebf828d44ede496a5016c7015ff1e4b4376f068d7937d7ca03296e7db. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWI452200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0431219af314c132072768052566bf5574e6b10229e7aa928650c22461e425d2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TWI452200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad8fd2aa0c0b06d8c12d1d7777bf7f412afa374546f80f96c24e15b0b4358c7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWI452000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7b919e969f78560ed8d2c9e9e00516f41ab36ef0d5b9204bcfc8cf9b871515. 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/TWI451900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3596f7de67d1036d72d3f02a3791e9b4918701e122d6bbba538b90dad3dfa6a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWI451600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681684038619b2d9e6f57f1357bcca56f3203fc790f912a9edafe76cd9655b22. 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/TWI451600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6b1f41f03f5de802e881087abc88fa5eddcda1ea3fa8845c76fb53d78544bc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TWI451600003.