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 0x66e173514611db917ba3c157064fa7582b048c1fd5066ab66837bbb570211d7a. 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/05134e8c-84e9-47cd-b20b-c95f77ecbfcb.json and https://artists.proofprofile.net/proofs/artist/05134e8c-84e9-47cd-b20b-c95f77ecbfcb.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 0x56dad091e342031dda420a4deb8aa868428b1bc7238982ac95d7dc52bd38a16e. 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/TWC011400221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee09ff9bf5e2945152157e2760a5bde8d489a089c8b41e2ff377e3bddb449c4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWC011400251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da7afefb7c456aac87961ffc2dce750a78da71c2a125c642cab5cdf394c8560. 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/TWC011400191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bdfd325141b92fa5dc50cb5a034154b51ad480ae85ead9c74560dd1c07ab40. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/TWC011400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb854907673722684f91a0c2f6b6e1c89791509e9825fdc52669d771e0d3486e. 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/TWC011400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb854907673722684f91a0c2f6b6e1c89791509e9825fdc52669d771e0d3486e. 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/TWC011400161.
世界的盟約 (宮崎駿電影「霍爾的移動城堡」片尾曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc010beb5b9e6038e16b75e06f7fa97d550b080a4101a1e47bd39e68961d45455. 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/TWC011400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d8ac8aa79d68acab58c1c721f65c67a71b844f951e21683cf8690033b48820. 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/TWC011400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeec0f46808bbf53264e52cb95751174bee8fa9206f17439983e30324c9ee1a8. 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/TWC011400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dad091e342031dda420a4deb8aa868428b1bc7238982ac95d7dc52bd38a16e. 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/TWC011400221.
鄉間騎士間奏曲 (經典電影「教父Ⅲ」配樂)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17439177fb3ce7e7a17e6f8cdd1f52aba845f82483d0bbd2c9c5212c8d65bf03. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWC011400241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee09ff9bf5e2945152157e2760a5bde8d489a089c8b41e2ff377e3bddb449c4. 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/TWC011400251.
遠離非洲 (同名電影「遠離非洲」主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bdfd325141b92fa5dc50cb5a034154b51ad480ae85ead9c74560dd1c07ab40. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWC011400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94cf9bf2e672680b4611b75b607d34a43e4f4bf8d3b656cae6d686fc0221f97. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWC011400271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c5b56a9fd96272ce6bdcfdfbaf7023e5246decbe2d426ff5cd78eb83e0562d. 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/TWC011400291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736bcf6f8e4d5d1d707f9a5e3257336be63308dcc9d28c3ebe64d0febf20e51c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWC011400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e10833e2357915cb86e8fff84750e45cb6e1ead6794f4423963a656d1b1e536. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/TWC011400211.
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 0x41d2e81144027e7b6d95935be7dd7612e01bdd59dfee58065e2bb14afbd73e4f. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/TWC011400281.