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 0x9bd83cce1f1bfa42756591fcf629e03e9c979fbd97f8bee31560f3214ca4e56e. 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/f3cd5e0b-cb8d-4d26-9bfb-a74c2ec7692b.json and https://artists.proofprofile.net/proofs/artist/f3cd5e0b-cb8d-4d26-9bfb-a74c2ec7692b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51529753265919e63f86d93531634129dfa0cf20d31bc5fcf6faddebad854368. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWDK51204014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a14d52e4100527dfb4b0f6098c6e0648e85176b83cecb4900b93a2028fb998f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWDK51204039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b746e27fe85d73a99884d1ee21d8979e25036d1337b1bf541ac08a00d32874. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:27Z), 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/TWDK51204017.
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 0x06f3bb2a7a6c698433157fb5d609f08ff16ec76763a2005b10c3bd87c776be86. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/TWDK51204022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f3bd4113a78b9023b1a6cc4e36acd354f51a6b10d113e166bb6d472eca5a71. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TWDK51204028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362c2958168c4d6971bca316427ecddd1666c3b31509e526af46f104960d3f1e. 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/TWDK51204031.
中國音樂交響詩(四)霍元甲/大刀王五
中國音樂交響詩(三)遙祝中原/赤壁之戰
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac0679d4031595fdab5de6a7eddbc830aeb536c05f1eeb5a5f13d80809f861d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWAN71880126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6628fbc65c0a0763953b073288dc30d4fc73a3d49b7551cadf216420a2c0c0a. 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/TWAN71880127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3405ae119d6976ac7ebb559d8c572eb06eff46c91166a50953f28aa347301e. 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/TWAN71880128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45add9ec7fe0af3e457e645dcdae29723dfb8fea5ca4f72ee0c6396e3120717e. 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/TWAN71880129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922c65ed7345bf29b6ab664c577ca9cf8af77f243635dd9df8df8508ed52ed89. 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/TWAN71880130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7cad3fb3e0e551a4860efff23aba121f2b3614c047a442c13d692b4d962300. 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/TWAN71880131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a96afabc4638a51d25bb6224ecafd00ed5dde8dfa90c58348b7f17e91bc752. 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/TWAN71880132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322223e140bccb23f85ba4c836adb7212fed99d8985b41bd0b2e5d1734f2d3f4. 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/TWAN71880133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9072e30ad9ee7f122db2b558956404118befe0a25c573c98ab1f2037da13f0b7. 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/TWAN71880135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3165c0eed3710cb7cd47c274e2bf9b0a58da6abfd7e2dabe32838ec65cb66bd. 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/TWAN71880136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2476efe594e25dbb1c535128dad2735d46e4433703ac1f0baef41ad4055e56. 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/TWAN71880137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567762d5ab002c5a7a00381a2b0efbb0563cec33733618c896145920ad8114d7. 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/TWAN71880134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2904cdba9b7fcb1322f49249bb58b89ac41d4d65810bd1f4f448ca54a7f0c8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWAN71880106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802691a0fd1392ca4873e5f3a02f0d6de0e747318be525ac9011f47ba09f18c7. 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/TWAN71880107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320bdc1216defd3c627dc15dde70218c84ac35dfb77f20286b981aaa81d7615c. 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/TWAN71880108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3d518e166892a3fb4fe1d0c6eecaf1477355779fd71bea3d1bcee33728002e. 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/TWAN71880109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10d4b5646ea9d16bd1aee15458198034da3f5c5971330eca35f0b2b6a282d9e. 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/TWAN71880110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be83c25a9ab444782fc90215d1b6467de42378f4471a9f98a2457b8af7cf3a4. 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/TWAN71880111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314cca7c94690e87c820f9e4174790e4728fce6b0ae9ac4eb73953631a611f36. 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/TWAN71880112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dcfd467a976fe33de4ff314c67dbcb389d21755c75e76bb009934ada71d347. 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/TWAN71880113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb116b404ff959559c66ba6b1a1d75dbc893e42dda10b13e1e3540d38fd87deea. 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/TWAN71880114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcca6d362afda430faa78e5e419a2e464f5dd393aebb10d64249009bdafefd08. 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/TWAN71880115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb191a31edc61e5fad4c2195888ef2316a06370de37495e934aecf3148232a8fb. 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/TWAN71880116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9852c76b7a19353be7085611a381e048a88910f34fda6d373080a2b3f3cb1646. 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/TWAN71880117.