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 0x6d5e3db301d92966a0aea96c24cb5c463790c1f96ab885807095db126b9ee93f. 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/e7f8dbe5-5fda-4807-bd59-b5c70b8e5d1e.json and https://artists.proofprofile.net/proofs/artist/e7f8dbe5-5fda-4807-bd59-b5c70b8e5d1e.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 0x5cf997fe5dc6d6a9122604114973870dffae77bdbe05e246374b5fba0dcb9f33. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TWU712205404.
國王與騎士 (電視劇《點燃我, 溫暖你》片頭曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fa1877e775ec1dba1ceb240bad80b2c2db7d3b4f031304a13e5fc36e12247d. 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/TWU712205480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14f8f5637d85f89a90088629ea6d832a85060c6b5bb1d0a448b76814bae2a04. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWU712205481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057697d57b77b99ad5641ba54782b070372448ba4703974c3b9d8b6b69e1f3bd. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TWU712205479.
戀愛循環 (電視劇《點燃我, 溫暖你》插曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6544efa23ab58a0aef7fe2eff5f8e327f40bda7870a8637ac75c14b5f56a9b8a. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/TWU712205482.
輕紅 (電視劇《點燃我, 溫暖你》劇情版插曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1efbda88a00879369dcbfebd7bd6e1bf2dcb99006493310ce23f4056029663. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/TWU712205483.
輕紅 (電視劇《點燃我, 溫暖你》燃情版插曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486ccf62ad64a1013cdfc45e3ececed422fc07cd27207d1676b1e52a30ee8dca. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TWU712205484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e42d62d8913ef56cbb7582fe43360b8589425451134a01ab1e682d51d69cc65. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TWU712205485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08137576023d1509c456d4ebca967777f7f465e3250442af6f28b16b15d600d. 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/DGA072339587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8110f8c21db780839612d237aef16ba2ffd3f6ebe8f34fc52a73a66b01e2a28. 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/FR96X2416052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76c13c7a59ce456322c0c79b5b2e790c7c6071bbacb40fab412e573b0a85839. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FR96X2416053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897a449a2e87bc48209dbc9eb33e76b17bd6ab61d88d9824e2ab1fc32da90f69. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR96X2416056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9d3279a822602a3631027ab4267379b6d40b217631bf4dfd9da5dfbb42e512. 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/FR96X2416059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c5c34ceef6e3fab27c479c198d9363c8eed70e9fd69e65fce8395d0e021708. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/FR96X2416062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e43ec5c0fd47b88b25f23b8cf629b5c8b8cbecd1124e0e611c5625bfb0dc9e. 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/FR96X2416063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096c77193a94b385023484dcfc837e3ba740fd57d353eed1e7e203fa1415ca81. 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/FR96X2416064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a6a2d5170a3a0bcd0a59ae523f83eb98307c728c17c1ad48a9281e0ac0f462. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR96X2416066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8af08a0107181d18946164483e1fbad7983c89f819860664db88aa1df01c106. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR96X2416073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ec3e2f5e14df8c8cc2d76ef9600763b93b23f01f1fa18754ec7ed7a8b956fa. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/FR96X2425156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bd196cb336b332de9bcf4a981878c1ad984a76b2ed27840dd2fa884418db34. 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/FR96X2425157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58c4412a5680b81227743594ff83e9dfa93ac86b0e883711d53f5fe65c7d546. 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/FR96X2425158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2408127995c55a05f33b75a99f3fc641703813771c5544c4ad478cd7a9a5da98. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/FR96X2425159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e3c15ae3119d1db684907053e47c174e78cd1a7fe9e14c162bab49527c4bcb. 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/FR96X2425160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18988f829cd0407122dc55a7e753c14c2b7728d824a751b60d49fd90592b581. 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/FR96X2425161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94faad2a0a829b4652cf282f308d4b843f2e922dc47038cdc5deb90d1bdf1ca6. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/FR96X2425162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962b6c8c16259c25e59c917726e21afb9fa93d3ce4b827dc4a0168c9137fd747. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FR96X2415981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5b04e083138e4ff177f5733c507647334fc5584ad60111f146ca5722159a81. 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/FR96X2415982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa9f909cca24ed1ec35e932468fb781fcba1becbc45367722cdec58894b739a. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/FR96X2415983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9fa0cafee697dd1e35fd3b96a15a793c171df6fe1ab6b3eb501e86b0fa6201. 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/FR96X2415984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24eb304fe60b5ad87e2a16c02a96bdb8b8ec4135b581ef706e2bef2f79220184. 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/FR96X2415985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb5d3bce0e91b567851cbc9ac630676f466266863657cdb57a8b70e1f4814ce. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/FR96X2415986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb351c48dcfc9110b59cfe9261aeb23c2f25789603247df7db46e4c059f3db9c6. 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/FR96X2415987.