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 0xf0a3aa1bf28da30ae11fc19a4a0c5a8fbacdefd33781cf87c8e5e96d09e7acad. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db7192bd-0e77-4d32-8aa8-c01a1c764396.json and https://artists.proofprofile.net/proofs/artist/db7192bd-0e77-4d32-8aa8-c01a1c764396.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 0x1287f022270e90f3634be49c6efbdd5eda375ef701f97e775d8b85fbf2664f36. 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/ROROT2203210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda780a57efb20f0d4cfa3ea5ee4e967183bc76e08b55f26f2735c1b23ca651a. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ROROT2204940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7201f8ffbf010891345aa9720322eff0954af34df7bf523018c4c37d9248be92. 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/QMFME2354592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b29fff2c315ef4d3c86bae75e74e5ad165bd88f7c3ce9b8cc7f0e0da408c58. 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/ROROT2400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a60239039faed29215c7e5b991cdc401331108e62909d83c38af88576172864. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLYK92400216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220c7dfb3842eccbec214b04c886059c7a9f4cc55121a24178491012de1ddf63. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX5MY2462263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac044c738ee6c8526e6527ecdc71f8004e3b5cd616028b34cd30f20464674808. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM42K2474543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196db61cf3c9a204301e65692be112f3f464765f239d02da52a56dd41e484ced. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZMHK2434469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639b5c439206ebd7ed28fab62251f6d61aba94ed08cc299c4969421a0fa4a5a7. 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/ROROT2500170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2baf92c4cb33794fe9143f6517969fb53231cdef5d6df33ef2ad5ff0986187c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ROROT2500180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115cb5f717927751f020f2f667a93c9da09f807d272d49de32ea2f5330edbbb0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ROROT2500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1813dabc831ce4478a4f7c33ba4d882b6b36ea87a5f018203c2e74498d4fe91. 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/NLYK92500459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c695839d1103a78aa6d522082ab5c30877d60aa4453342ed95904f528c6c72. 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/NLYK92400149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779ed865378e02d9cc02e3f9a40cd24b2cdf6e1d9969845c195d406bc2a3f303. 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/DEEC33500867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ae4798039be4e38ca3cf67f4dbada5335139b6477bf332e575b6d59b7bbced. 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/NLYK92400285.