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 0x9950094fb851b4ad07dc57a397e9e6fb5909a2004b8f91999970f34c8e023515. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcd8a774-4758-411b-9fd7-7410a6323add.json and https://artists.proofprofile.net/proofs/artist/fcd8a774-4758-411b-9fd7-7410a6323add.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 0xfed534a6dbf3e94fcbfc55c86a3b85c2dc26d7d04761f0c48b38c5dc79e1b111. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TCAEU2014487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe085c7cc11b9af20663d2d4578bb6ad74a5d981ab71d6e35d14bc2af8be2dd68. 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/TCAEU2014497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f27e932d608775aabdd2b87ece941813e5431d2321c633ab350fd22d71bae4. 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/TCAEU2014525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d06155220b877cb5bf7d9a8990df80f8c9441c8dd38dd320de41b66bd4a4df. 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/TCAEU2014531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72ed95875a9566552686bde776be6f6c7bc3734983f1fc41a614aa2370ad4c7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAEU2014532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047e4bc3f7c1320aba2de5c13abf0f9f710c9091fbc7a42deab7111367974c84. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/GX3HH2365853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2ebab87fbbe8013f2c001eba80de607a6c297705d88ea7f37b937d79122ab3. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:21:29Z), 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/GX5MX2380550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652ba386d51091c8f2f33355e57adec41c53b1bdb2b3e0ffe39557b61fa4366d. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:32:14Z), 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/GXBDS2395440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c29d5ece0fb910527ec046e348d3b551818fc7b45adad2fa6a0ae299488d75. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GXBDS2398763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80942679e7e65c81dceec1ce58a1bbbcf30e93dca339eab8b5852d99c0ca7f0b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXBDS2303081.