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 0xc3756fee90daf9be23b26b9084739fd01033a23d8a664048fd2e19d5a2c0cac5. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e8dd8e0-1cb9-4a58-8866-f6055ed0031f.json and https://artists.proofprofile.net/proofs/artist/9e8dd8e0-1cb9-4a58-8866-f6055ed0031f.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 0xd6a0d76a0f890dd9c13c41cf5e76994476cb36e8b5912e1744d68d0d5c24622f. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/TCAIP2486769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8055b536b18b18737bd24caf6a75c9a890e1279016db2653ea65d9bfce5a10e3. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/TCAIQ2486125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232f189f279749234c5b049abf461d23567bfb98d76fa7fb009f1741014c0430. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/TCAIR2484831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435514cce35135ea62eb72343954f6fcc9b79dd425d9282172d7a54d13a0940c. 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/TCAIT2454856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38366486d8cd0f92bee41ae64eff31b2b1173dad0f90356e16b35bbe0dadee95. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:10:31Z), 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/TCAIT2455062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f6f14b19427252adf398c3a74a39f5a61a0c9cc957a7b3470041fd93c300a6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAIU2449266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16f2acc909a02cfd9b7691b51a9a5d736d8a3f7e61e469b7e5c752cc3e11726. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAIU2479707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9241bccbdccf24578c0905e354c716d852b9224b6df3b6b7cd7749f6008b629e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAIU2480795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8e06098468bbf1003e7b99b59c57967aa6767124b5c696908c93d06e6b02c1. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAIU2481066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120af64ee946fef71c570446223d9a9173339ef2cfd54a0a0b3b21c0276b50d2. 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/TCAIU2481004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c418f82e748bc4abb05b39fd4a70e3bd607ea1ed33c77cbb7a31c319ca5100a. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/TCAIU2499419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a26933e8b2a2da3fb1b8978d91901eae32118903d96c33e3a13c88cfc448b0e. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/TCAIW2463099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63e0f642a2a3287e967724c8388b45f306ed775890bea29a2c30c86ad390cad. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAIW2484502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ed2ea6a91814604e8f87f33d773a6a27fc9b1ff678b42d4b6e41b3afccdee6. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:08:52Z), 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/TCAIW2484558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac54269fd251026aea8b52833e169fcf9c42f9f1f5976f1a38fa6716f66c8db. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCAIZ2419901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabba9afb92b286f6575d9f9eb740d257aa17c7fd777f450071eac9e63e5d076. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJA2419720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d573f6e8a5a1816483911d0a6e42f8485c4fedd96ae47d4153bbf73038990a2. 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/TCAJF2559764.