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 0xf8fd73989dac9020d9e9ef364f74bd6178328fc73bf4d2b26d69ffd041ce6bf3. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f650f1a-4317-42c4-ad01-6c88bf35dcf6.json and https://artists.proofprofile.net/proofs/artist/9f650f1a-4317-42c4-ad01-6c88bf35dcf6.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 0x7639a3988e468e4f45b0e1e4f971dd04bce30d40e819f234e2ffcc6253591c66. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM4TW1754272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f83652f707b5aec017f7988e4751b9caf5e8aee4820f56a261fb694393533e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:04:23Z), 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/QM4TX1779840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc6f6b64e9ae6ac1505a9df254ab27b0961230fab13bbb515af161f581fcb46. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QM4TX1779841.
Tell Them Where to Go / Choking to Choose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bca9fc7ab6b893f11e161abca63aee8ef6b6dbe87fa266f9af74109314768e0. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:45:03Z), 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/USMRG2072302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1699107dd8b0729eeb1809c6a6b13ea796e0e3d6d6d5a05a5274eb4c392ff23. 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/USMRG2072303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1699107dd8b0729eeb1809c6a6b13ea796e0e3d6d6d5a05a5274eb4c392ff23. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:45:22Z), 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/USMRG2072303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b22f6514e06777ff44a1bb4ee07011e845b7fc47ebab8d7465e2597949fb131. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/USMRG2382302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2ec5bd5a97c339d3564bf26def18a05b4229bdf9df6d781b83391c42d063fa. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USMRG2382306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c9448a37b6cafa1a7095c52d0da0144440d418a07241d057b314a3a3669b18. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USMRG2382308.