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 0x6c1d34d0924859e0acac7a11a46dcae3757acee8109fbaa3cf72ac0978c8b6cb. 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/ddc00cd7-216d-4443-b10f-83a1c7c0167d.json and https://artists.proofprofile.net/proofs/artist/ddc00cd7-216d-4443-b10f-83a1c7c0167d.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 0x789f3665f9260935d3a1309a689125b2e1b1bb4c41bca8da21ffe7018ab3e5c2. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:16:01Z), 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/JMA271805859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a9cdd11a4d35c0e91aec82f3f08ff85ace6846a29a93c8819c3058c3ba9683. 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/JMA271806498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3f9eacff7958f7334b87bc6351137673246e284aeca75a0620135993bf42cd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JMA271806499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff80186559a9a04e975106b44f8253d7c4f5fa7d37b2874fd56974af722d37a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/JMA271900187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47a324d64f1d24df5003790019e1de7655d7cd2aeee819ddfade24278ca4dac. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/JMA271910769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9e8fbdb03cfa1828bdae7b02a9351104827272638348cf7cf6bb33f0e3fd1a. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/JMA271910771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c04e2b9bd41c860e4f07e4df1b41a6154daabaeeba47bf0b96356e05ec83b1e. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/JMA271910773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3383aad1b04d1554d6ea6ce3ae54b33424b58b70ed92664e75aac8fa39b7f15. 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/FRX762467669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3383aad1b04d1554d6ea6ce3ae54b33424b58b70ed92664e75aac8fa39b7f15. 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/FRX762467669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3e62c46f3fff04f63f521423b5cb09541e31c5aa66e89c2b3bf8cb130cc8b2. 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/FRX762467670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f265aa1c162db6fcee19de7fe9bf58e4e0a4047b62c08abebacbe147c8eebd. 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/FRX762467672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a092a045d0ccd0fb4776081b285fa1abe0dca28020ceb51cd3517100ee8cc75. 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/FRX762467677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddb7b2e66ffc4e0132ccbe811a0e3cf0ae9fbc323f0b77b603c86059dd0f190. 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/FRX762467682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3f8d404a2d5b460b70882707d4b02815c79d2b7fae5a2c25ac8e9643a0b515. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US2392550341.