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 0x47e0f33e07082a6697d233cca71c6fcfd6526fc0fc16d2c8182b1967d6308162. 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/c6331aa0-35ce-4627-8b9f-f9049c4050f3.json and https://artists.proofprofile.net/proofs/artist/c6331aa0-35ce-4627-8b9f-f9049c4050f3.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 0x2c88c445a6a6a42a3a7ba0ac4d3799a377ffa20761639e1bf61e716bd59d7052. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/DEP069400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1db7735fa0a4b74cc20350a25a3322af79fbe38c68662e33e2e8e6f400f9f4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DEP069400109.
Antifona D'ingressto Alla Comunione: Qui Vult
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b5debb2425b22b481336e7e70196f719db653691114198582164c72b21667b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEP069400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ca73c940ec1cd8cec4914ba2082bf0eaceb639c9f7bf35f8a80142f3b8cc3c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEP069400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b28921e33d05b8ac7606dcb6733a844c5ed054dc9c6fa0f40d3ab3501123f7b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/DEP069400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e8c13e56cb0df679460eb767918d1061d724df3f37883244bcbcab3627accc. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/DEP069400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917af08cb6f6143b3b159ffa7ea9bb1a795cb5ea63e6ca6f48bf6bb704714a26. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEP069400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5089199fb0ff0283d233890c017dced89bfbbd2f0a16de60da842e3c82c6b75e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DEP069400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a063d4a301807ada109ab2652ca2f82336745445766b919529e4f4fa09b5509. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/DEP069400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f5a9514c7f59ad04d6db5cdc157df0c0753071971b7583a45663bd77cd8775. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEP069400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06a773e4f64f88ebfc2d2668c42709c37cc3f4afba0097e8ae57dc7f7f3ecb6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEP069400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e076e043041a79ad1936236b7d19cf2528d0c2a231127be6d686050fdca90e. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/DEP069400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35201e20ea855899b72eff450470df2a2a1d8243485cbced81f201b087504e8b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DEP069400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344203df1bc6a2cc4bc3c56aacfba1906a8fe9744a8edf7c1eafecd0d1203dcf. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEP069400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0f800a94adf322978a57d0f37684d2522e0e6c19face46798ac934f03322bb. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DEP069400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64aaba204bd26abde1480f3b75b48f5a88ed8f0c09261682ea7aacdb8e8362b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEP069400128.