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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8be1f62ae8b78494dbe359410a0d92303aca4a392de618a62a5cdc309e4549d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d3ce761-dedf-4aed-8b38-86877615c130.json and https://artists.proofprofile.net/proofs/artist/5d3ce761-dedf-4aed-8b38-86877615c130.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bf1a832ab0681412a5606c25e719afe480fe7006dd1ef8efb9a03b0d6ecda2. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/AUBEC2567229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e180b6366c6ff8acbe03b3a6764f3706756ad1d2c159ddac484ec5f82c6d7d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/AUBEC2567230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da06af7f8736a2259df28e144bb3cc762da2976b11cf053b84b2cf42e6f7d1d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/AUBEC2567231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9202f8473573683193f9db3a8e653bcc8e5abf4c4a1bea7413acdf75e3716b1d. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/AUBEC2567232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b67da56f4f5187ad83edaa4a6894aa90507b08e85acd638d6780533699745b. 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/AUBEC2567233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91163335c8a8e9ed1f0fa8f6b6a1cd7d822859b0070c01c2a2267191c5cc084f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/AUBEC2567234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80faada5983af2868b581b0f66ddc7ab4032df958b23218e15c212b5dd99105b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/AUBEC2567235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc92e0aa18e9a212fb5151ac77d54f8c9eeac3d636c3a82261b84eb5bedeacdb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUBEC2567236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd6ee4c32a45fb8965775268ddee971f06e0024a5f39e4d6c71684f9c2670f1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/AUBEC2567237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1739938d5c5081cf773258693934ef7ff8491d478387ef49a0b68a0c66f9dd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/AUBEC2567238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8d7e4a0480f936bad6b51845af076517045096f3efa148a811936ed5e32558. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/AUBEC2567239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2a4d7f658981b6f5930f01aa6bf2ed6d9e86af49f05dd76f83828b1602a76d. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/AUBEC2567240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feabb94bab33e5c18813a927fba2861dbcc90da7bed70ae75344b197f327776. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/AUBEC2567242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce841b082427476eb983fb77a0a0dca38c9f18a7ec392fa723468008c6348339. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/AUBEC2567243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67789ca3090dec8537c2aaba993d1ab24706d02d31f191fb95e97649273fab7c. 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/AUBEC2567244.