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 0x31af58cde7fde4a6d3a422bd8bafb421e83137bc9cd6ae83294930efd576c63c. 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/930ae256-985e-44fd-98eb-8cb51a91ae13.json and https://artists.proofprofile.net/proofs/artist/930ae256-985e-44fd-98eb-8cb51a91ae13.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 0xa8c8d808d632489cf9d19291cfe8975c77256b85a45244d07fa167aea923cb95. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/HKG731616929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9c7451a32f94b5fa6450f745a3231ae790fb22b145e0aa63ced5b6ae759270. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/HKG731616930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4a48f004c3f1d3cee4e82c521e5b4af7b13176d9e79fec844d55f4cbb5f45c. 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/HKG731859210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04733e75e8567d5e969e8b22aedefa039930952575cb8f4738983f230ff804ad. 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/HKG731859211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0286c85a7528ff6ad2ac638baf11d34b27b4e5a193426028e22b5f4d1815b3. 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/HKG731859213.
九游青云志（九游·《青云志》官方手游主题曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa795d8aaf778fbabe62017fb7b6bb1005828bda98bef5047773f0d9617a795. 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/HKG731859216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4678c80622d2ca74d8a82228fcaeb567d27fae83118857d23e0e4a59d1ea1111. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/HKG731859218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01feb33b576f86321e09751f33d6f8ab4c121bdd563749729b166713c8feabd. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKG731859221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5551b8ccd414112ae0535cc6ccc96a5b22d8e5c16bff0af6051cdc6a351fe99. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKG731859223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7d29d5aaa25c8dca73da19583904d8a0a84b0194635b0a400183b80ae010bd. 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/HKG731859226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb883ae1f2d1e3e90ed4887ef35b8962d1fa53ccfca1864029c6acf06b459343. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/HKG731859227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a8d46b7eb6b1958541a89d41f15e4d9ba1b06231198765fd30b8c86613f0df. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HKG731859230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2461a07c3008125697fc0ab6e53b94adf8d0c169dbecfa15ce04c67f9a189cd3. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/TWCT52324694.