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 0xbdd9723db6e70d22ced6307b9067494dd81e186233e0fdf5385f595e1eaaa132. 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/ae6fcd78-ee19-4b57-9969-f1bad687f46f.json and https://artists.proofprofile.net/proofs/artist/ae6fcd78-ee19-4b57-9969-f1bad687f46f.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 0x5ab0c0ac945797237242ae17571f42de8061a8db39d45406c5955484056411f7. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/DGA082212863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886c1383deabd30e63b6947997913ac894708d351481863a6fec20adb2e03386. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DGA082212864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398b510caed14ab48ebc503fce3b6dada8ed7a61cbfecdc84f6a28bb5bcab5cb. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/FRX202402672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18d73f855229f71437f9ac1854273367c686bc49e1672e282018120c53c3b59. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:30:45Z), 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/FRX202402673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a447bfc572b2bc59c955c826f3c6282e0580b280d8c94b8256b668e3e3f473. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FRX202402675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1963e474888f0b3a65f472c86a771ad332211018aab41d561ba74669f2e7a492. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZW9K2425157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15a181e381de5717682a0aa7aa8ad19d134b09323caa91e575b237cf3cd4515. 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/FRX452448899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd65c426b3abe0d48b438de5e7e5114d5d593effb2a1b5bb380e33055166ca1e. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZW9L2458942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425ab0abd94ce0a22f6cfd4b676016aca45056dfa1aef8578f7790cb2c8f803b. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZW9M2443014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898347af57703ecbe29c8365290bf6124092a229d294a24dc9aa95db9d8327b1. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/US7VG2530817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12cf587fffa9adcab5c60101323b0ea5f0aeed2cf03fe0cbc8638953e646cad. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZNJV2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cbe84193a8ec9aacdbdf7ec3a347ac3de5e35ba4f65d363839cebe40bbac73. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:38:59Z), 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/QZNJY2548052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaca522dde84786cf6094151e7fb5313255a87aa31102bc4d151a1a81733b36. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTPX2516615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a55dc0260ff74abb78c14399e11695e81fd8b416f38513940c838dbee5d8ad. 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/US3DF2483257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32db3c6b18b04ff19a264e5435e0450780e4a003eda0342ed716d6af55c38e35. 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/GX3Q92403032.