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 0x0c177117e73523b9c454805016584e0278f1998112e5d9a0d07b4f175c5c2f07. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ceb75a9-2201-45da-b072-e71408732f6a.json and https://artists.proofprofile.net/proofs/artist/0ceb75a9-2201-45da-b072-e71408732f6a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
第一樂章／適度的快板（取材自〈地平線〉）
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 0x36ec2980ca01af8d73e59724823bd981ae0b7e1cc577353aa5ee2da7fc41a4f2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWF671500216.
第四樂章／有精神的快板—莊嚴的快板（取材自〈痛快的哀艷〉）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1a3cab37ec074c31813e91544ac0d09a536c95032eea84b7857766a831fcef. 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/TWF671500219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c08ff436de0887442f7f17a0a29a974d209e5deea221967e40cf3fd6ea44b1. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TWF671500220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b00ef987cedee123b5c95ddf9f76fe0dd320ec02460294cd3d3479801d6796. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWF671500221.
第二樂章／慢板（取材自〈回車諾比的夢〉與〈下雨的夜晚〉）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07484e8ff2c072d5ca6ae7f1ae832c1263d16dd4077b468175f92ddda5f642b3. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:25:16Z), 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/TWF671500217.
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
第三樂章／活潑的快板（取材自〈他舉起右手點名〉）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc67caff537d64b66c5b727a589cdda88dfefba1416601319c2ff7550c03fbb. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TWF671500218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc75db823860c6e8b3bc6b6abef03815ff2f96d95d4a597457b9cc66e7b227a2. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/TWF671500222.