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 0x02383b9b421a814829f055a1e1075b642e6dc536c4ba2da38e7d14ea7ae820b4. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9755c650-cadf-41cc-9494-c14d25d24015.json and https://artists.proofprofile.net/proofs/artist/9755c650-cadf-41cc-9494-c14d25d24015.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 0xd5f144069fd29fde7f70ee72e3535932ef8a3b5afde794dd628f6c245a339cc4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CNZ842200566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb52ca724c77f325d51ccf0bef8227f57f5b98373508cf56c888e7d207bb9f7. 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/HKE022304451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d248c330cd9e1aaea28fc0d80cb4d2038938360ac4c139fd410c85916d7ebef. 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/HKE022233348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fcc17c64d5a404c9c888667b7862ec48069a0653d137cd5a6756cb6cb6db07. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/HKE022239642.
標點符號(網劇《我是歲月你是星辰》插曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7f8fae2188311d42ef663e0f67f83a23720a3198e4dffc793aa94a9090fc08. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/TWDL72110324.
既視感 （網劇《我是歲月你是星辰》片尾曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ca8f6688750df222b6d35bbcbdb975528b0abe609eb2ff26d54d87c140888b. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/TWDL72110325.
表白（網劇《我是歲月你是星辰》片頭曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2857b678250de2ce9260c882b0c7df280e8129256ad5d0ceaacb79a07b02415. 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/TWDL72110326.
一紙情書（網劇《我是歲月你是星辰》插曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8769d451bf769ae0b1ac195a652b2e2260d98d54dbe8093a48d4e8fec216806. 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/TWDL72110327.
結伴一程（網劇《我是歲月你是星辰》插曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23bfecae372c62d696f7a94728bc60e0f869a8a9cd6294886ba011fc42f404f. 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/TWDL72110328.
一光年的距離（網劇《我是歲月你是星辰》插曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7368a8a6f40cf9f2ce9aeae883acbc74ce158d9c7ab93f1c3e51850d0f2889. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TWDL72110329.