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 0x5ffe30e09efb44c65c311bd0f6c31de2d50f1f211c1aedf2ca62875da2b25187. 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/ae0a3c2a-0c73-4ab7-af61-7e82ca2cef97.json and https://artists.proofprofile.net/proofs/artist/ae0a3c2a-0c73-4ab7-af61-7e82ca2cef97.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 0x79eed81d8605c54f726f028f4d4469d2e420a02a4e79f355a604711fa6a3d080. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR10S1864634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec9440074abae9d7745a5257aa24d1420e5aefcbb86d15f3099c0a82bd28f31. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/FR10S1855872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e97d58a2275453712906aa69b5a68b4f4d07a90cec5cc9de3bb7dffd72e976. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:42Z), 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/FR10S1855874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4579ca429ec50b3d18d88dc5cf6571806a5209658c02b09cd1a2a017574d6f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX762171907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c313f17e669253dd3028d3e6a3185e15dc5787af2a46ca4dce30ad6c87fcdd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX762171908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef4e92719216542de023d29173a8a097cebc449bfd78be512af45ef8d013c39. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FRX762171911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2590b3772e46cd424069e508755ebcb0e1b3fb49dd297812c4091586e2e136d2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX762171916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133f5beb8e7a98b0a258544bf16a810c97c2afa4e739e6ba67f2d6e97aecccef. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX762171918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4153b7c048a0ee08d19b0677550cb26fadaa127d41e0386c0b72c2513b5c6065. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX202271872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaab680f3e19c3b6586aa95d1aadb9df858a6bf64da53d67514bf62631d0dae9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX202271876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b406c0c1928b55eb62bd2d1101152bee2e11822ddee90576fa9ce153234b16a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DGA0L2361431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d1113ae2b4e6d3f7635ad80f0b99ec2bce889e9bdd714713a2a662c5e51921. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FR59R2505371.