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 0x047d589d97e68bd71b44572219b20fe3616ee318b4b298ff1049f3e13a2d72d2. 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/5380adb6-fafd-44fb-8d7d-4035b9c0620f.json and https://artists.proofprofile.net/proofs/artist/5380adb6-fafd-44fb-8d7d-4035b9c0620f.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 0x00fc8ce35fcd5fd88fff5943a787b6ecacce5cb00919952171a6bb2d6b7f7ae6. 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/MYLO32410018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f302516dccc9c4d10d4d6edd4281c28cc34bab117350b97e203489a0629189. 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/MYLO32310030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4e8b51b1fd569d25ff5e3005cf40f6b39ca4edc3b779e777725a327822e1f6. 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/MYLO32310027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61b8228f27737052d7180c6da5d84a1ab4d537a785ab7a10d9e2676898a86b4. 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/MYLO32310012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ff81903454410b642ccf0b4a9e18ec907d709d840f44381669de93045aa7e9. 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/MYLO32310010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda14583b68c8d95d8ccaf67e5a5f3d6af56ce746646668b50dce0e53a3fed632. 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/TWCG52099753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cd764336790e05d288f1147c0c7af14e031f6578679a710d9ca89abd0b0429. 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/TWCG52099754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6c9d05799967bfdac4278007b239b85150b55cb348b630c730eb2f11cca2b5. 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/TWCG52099904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680557eb4e4a199b3647d670cc1042d7d594ea3c13f0d79aebd11b3e241dd69b. 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/TWCG52099711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484d912be7646f54a64b56638d5250566bfa7b8120cefa7f296c42ca4aeaf6e9. 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/TWCG52099912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18c1ed15269b493e77a36d668440ccadb6f515bb3a21c4f47b37a5a8388c655. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TWCG52099913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f53ad2b7c934d9fb6f43f1de1b38707daf83002e4c3678360e0bb1b676a182. 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/TWCG52000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b81674237eb6ac8dc605d71220c06268405ef2e1ecf5e775aaceffd51805a4. 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/TWCG52099952.
一個人 (《北京女子圖鑑 整容大師》主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1859dc58f5c6591dda1dcf00a0ad38583245c478556f177e9a995389d2c5a5b0. 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/TWCG52099984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b576bc981dee5c42b89fa8d2addf10473c58679d49bf1e7b33a150be649492. 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/TWCG52099985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42297f9fd1a29deba9b50904b722e8b1907c813fd8b705dc783367ff2dc7885f. 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/TWCG52099994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98c5ec99acb64e13abf2cc4a6494591b9e0623eebcba687d8b74576b5382b92. 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/TWCG52099993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389ee10193c6433617c06d7416592f9ba932cc88e43b67af0ab681b5a625730c. 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/TWCG52099999.