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 0x897254a632a9e8bb9e671dee95209b4b70e32e1aa93610a1b7aa666d26a1b151. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6aaafc2a-73cf-4927-b816-95d4f36dd968.json and https://artists.proofprofile.net/proofs/artist/6aaafc2a-73cf-4927-b816-95d4f36dd968.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
群山之島與不去會死的他們 Island of Mountains (紀實影片原聲帶 Original Soundtrack)
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 0xb2cb44231915161306215687e82800d23f787939495952af8f0487bcd764c460. 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/TWC012110201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9866edd0532e80686cf0f82c9cacddaeffc7d3de5b8e2fc8781c4bd53783fee5. 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/TWC012110271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ab6c0c979adaef579440bed116ad2cb5d53d37b26de39dae6d8abc2a382bbb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWC012110341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0f3d918c82745ad4d9d629d01d1710b6262ce3d8d4054b713408e36ab87656. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWC012110361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155cd72c955867b347ea1c563175183b54b91ca9a450d92ea01bc4e3fd815295. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/TWC012110171.
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 0x905f70c63cc4d48144b74a9bdc07b653a5588c901f7c59e251916791725d9a73. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TWC012110181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5653bc4ece4d2fdde1aab6ec742c8c3673e02b421bbca6c17f8ea2fb3c62ed3e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TWC012110191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401db0d9cc282e4aa9c55248c24bc6b59eaa0300b7bde3c34fa91089dd9f992e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TWC012110211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a473e06c066beb47ea8d4379bb1b8fd0fb1dd9e5021a6319bbf67dabf3b180. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TWC012110221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7150a591dd676d71eebbaf58e6f690a80b70f3acd57065f63874bd5fa0ff5730. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TWC012110231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9ed712cf3016070e1c789d979ac66c8a78e77192a71a18499ceb76724bf38b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TWC012110241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1693a5e55b655d3f41f94b68ee05928daee1b4b6e8f1a9484ceee98699815603. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/TWC012110261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe364a71cdeafa04d574795cc1f93e57fa0aec710b311a9cff54b9e5a93731c84. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TWC012110281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f26767651004dcceff86a961a94323b87ed70e3ffd5b959546e7aacb551ec84. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TWC012110291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6d2acfebcc6894a0daed75433d40ad04230c0f40927a935cf801d7b7b6e112. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TWC012110301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b1a4c7d51b6125c047b57b8b3cc206104921ceb4f01f2e68f2f6f3f3f71066. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TWC012110311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc397009131521e152bb275b13cedc024379bbe243e20a9b9a5ec43c22923682f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TWC012110321.