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 0x93b011af9bd0dafe56a3b8aaed2e78438d3ca1d836fa44fe1e41cd1f48a86898. 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/d22b667a-1505-4948-beb7-0f276640d920.json and https://artists.proofprofile.net/proofs/artist/d22b667a-1505-4948-beb7-0f276640d920.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 0x5ed7d1dcde1a9b87cee44b7e402ea66b70f984d54217e24fe4e7faaff04ace06. 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/SE5Q51700195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39661f20e1b3775cc223f8f1a62f046526eeef3b88e477f1221d82cd0f08a4a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE5Q51700773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617fa3b7ff57e6a6da928f9f66254bbc0bf98c8ff03d65ed9c2d77280a6e0fcd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5Q51700979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911977addbce42230c77e922251def99d16fabf9a26f61cdb5ed66e96133a99d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE5Q51700959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f156afe712e1a201896e2d26d248b47c33cb4de423a04a9c1b3a5fcec4701d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5Q51700510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6f84b50ffe6a7f5cdaa45f4d81d1c83105ea9864e95d5df99a58ebe41ca2f4. 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/SE5Q51700951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb572bc7493528f28b07c5548ea0d95fb83f8430ded944f18c32ebde0bafeb515. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5Q51700243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6f84b50ffe6a7f5cdaa45f4d81d1c83105ea9864e95d5df99a58ebe41ca2f4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5Q51700951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26c89e06e0be37677d50420e2c2de9e0a33b0326085201c5b3ac040187f90c4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5Q51700920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd846b2baacaa5d73f7d57db0530decf24def084af09d1c3e603d5149020d7d. 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/SE5Q51700239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc975e08b21d3f81b066db5df06ed8382526b03b7eba539dcd91e02d94489426. 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/SE5Q51800994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3681c17cb388fe1910fa863ea07749f8b572720030ad6c0cd33346a4a67d17f5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE5Q51800995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef69efbcea51e1839f2bc7bb31c7a43e64b0960a8a5f5335e9aba724d64f9d2. 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/SE5Q51800996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb87058c0f12d26b0b0b0b55f6b23b18815815e2c5995074acd24dbd7faa786b. 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/SE5Q51800997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bbf27a7d365807e120b01fd598fb565b10abf637e1be8201da608fad99bde5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5Q51700956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6f84b50ffe6a7f5cdaa45f4d81d1c83105ea9864e95d5df99a58ebe41ca2f4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5Q51700951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17a3936dc3c1138074dd21bf8f2144b7088064b2b5df5a6bc3512c08d432386. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE5Q51700251.