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 0x7aabea1bb3e0b8b398287d9a96b2668e4d3b0c54419b60a9aad781197e5a764e. 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/b2722bdf-1dd4-4c42-a47f-1f0044f33d77.json and https://artists.proofprofile.net/proofs/artist/b2722bdf-1dd4-4c42-a47f-1f0044f33d77.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 0x73c3b2fb4ed22203e922bde3027377979fe81128d0dcdc3689fc7debf3e3f8ee. 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/FRX872308889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77193952941a910ffd359717a7b5b13cc1a796344177d67e7428a4f3cdf8085. 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/CNC072000293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe094c59f245099dd2de7476e2e7e30066772db45ecd4934f6794129327441e70. 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/FR2X42436257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e4ab8cc4476a7a8c78b13fc255e2c6365dc307093bbfa9f001230f2bc637c0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR2X42436260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe206c751f8f870a1a4a7347c5c9c877e804c1f504e3370b4b9b5069525fdd319. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA092210897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9de4df456a147cbafc70af430aff873d7568f79303e1392d571a2ad6132eab1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA092210899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a24d9a85959ddb5a3088ad94b08e9773930b741dd77a30b52bcf1c1cdaa8e6. 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/DGA092210900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9ead61e8eaedd68b26bacd5641f2f7f6255f42d227f4789fe20625f1b2f898. 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/FRX762283807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b0a07b1dab5043605b3f5d0bd309c3e99941e63e397b194da155e7641a3af9. 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/FRX202215885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc464ef313833423fb1d27e84d8135d927c50dcad1eb464e1a93209773a1e57e7. 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/FRX202215887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddae1ead6737af64b205cf28b5def02789d48d2c0b8445e6d5afcd3f7a2c04a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX202215889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb2cba230ab8fb59e5983b9648de62d6b523c1d84e2878574940db0da3f6c5a. 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/FRX872154607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e6321417c57ae4057680eb51d8c69fe04cef1b1c9722799b3c65e77f81891f. 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/FRX872111215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f87383489c58a0dd3f7afa9b39be96edc4b5f8172e03eeb09ad17eaa5853432. 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/FRX872456167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b65e990461f783f22b9a6184d50af941931d908bae9f314bfec6cbeeaaa01f4. 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/FRX762467059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942616573e9ee85cf63e81302a94449a659c551bc2e652b811602f9d26bb4291. 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/DGA0R2304380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11218609574d77465890d63094c0bcf691caf0954c16179e86129433c197c944. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA082368275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73796ae1698787fffdec0cb338e103cec26f76a3ecc5382561c72906a2b7cb9d. 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/DGA082368277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678bc4b230708f21bff7ea3b3c85b6e4ff5472eca4fad3c7d077f976d1ba95d6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA062349831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b90ee134264c48054543c9b36165a0eb7fc078fc81e87cb7ada1bf0344ba02f. 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/FRX872304706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09b606066b9138da39c6cf3a4afb53240ab4d21cdf02b12e940ed52ef45f294. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRS182126809.
铁血战士（《铁血战士》电影同名推广曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c1bf08c24a75a6ae3880be648f0c295deba5ee4fafb2bb5cc8f19932b74fcc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZZ972326231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00225f4d64b33ca91b1596c7926e27ccbc9720ed528ff99dd686927ddcdb8e29. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CNZ852203202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a1178ef1ec287addfd7d2bfa16605c476c77d2d3fe267d783718095483838b. 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/CNZ852203203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99352fa0b6c9a3c4f2c603427eaea0db3f6b835caff3d46e3fa07f1ee16af80a. 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/CNZ852203206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7827aeb4ff35d6f637f3dcd7a53d17d1675f3fcf4e5079a55f75efced0c9de2d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ852203205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dfc88fc31432df854b944ae5295881c7acad9ae63fc5f8e4b280627c2a975d. 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/FR10S2509677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35261c81b2de17419780563597d3e241275e8c077bff23fbaaca91b41f81673d. 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/FR2X42530287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a6d4470b1d2e097d81e9f3146c18a1d8bc525ddb8c3fb8cf42134a35f1c730. 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/FR2X42530289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036a1343ab193effd389787cfcf9f87649184df52683c259e47eb70c785c240f. 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/FR2X42530293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e69cdc4540770fe7fd01fe68c3047088b853861d8275b6604d07e6ddb778d16. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR2X42530294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafae259a48d541fcfdc665c1a787a2a05c49d3f67a6a966da0dd28d0a95de8b6. 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/FRX202585739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe422eebb16f9f3233c88c12d1bb0abe6b5c32e58a18aa65fa139c821158cde26. 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/HKG732499119.