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 0x7a66cb16dc93e5ff5d2ee09ec8659f88d66f717b1c170e73777dcb0d05b36a06. 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/0bb07ed6-0fd2-4b9f-9b5a-c6f5d79f1d1d.json and https://artists.proofprofile.net/proofs/artist/0bb07ed6-0fd2-4b9f-9b5a-c6f5d79f1d1d.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 0x82cac33ce8ce652ee6ddcaf3e446319145eea4da04a3ca6478f86480c20728f4. 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/BRFBE2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1e1834cce35faba2306bb418bd023271da155960af65769d10ee06cec83b7d. 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/BCVHO2100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483095e78a3c7ba90be2c24b956da9988b5aeb1b0658afc5f0330e34305ba658. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRFBE2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f209a65089aa9552bf0ae828c93d2de785f4cbe3c90b736a7833f982feb67a2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXK1W2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f209a65089aa9552bf0ae828c93d2de785f4cbe3c90b736a7833f982feb67a2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BXK1W2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d6fb9a59b580d4cfc867e93aae89ccd4024e1205b38dc65bb87dae4eca156a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRFBE2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3ec83e360fe6c7724b0e16fc2499ef5c739ce4cde5012bd1206f20d41e9b3d. 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/BRFBE2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c48c425e7e4e0b207ae9a6fabefb51749986a8e279b3fcc5b8390df576822a1. 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/BRFBE2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee15bd769ab1c9174bfe4670b6dca0216ac318bde0c68cc1293f8377309cf28. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRFBE2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cac33ce8ce652ee6ddcaf3e446319145eea4da04a3ca6478f86480c20728f4. 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/BRFBE2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc404d4854d2e06666779b9d7e86ec67de3c57e457a382c8d557553d3ad7c9bf8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRFBE2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84023f8c21d3009154c896d9b1f5586b78a16235049c4aa9146fd76140c47975. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRFBE2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135a819f1b07f43d3c55ee60fe982877139462bbe74fdc1876bacd20294cc959. 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/BRFBE2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca407942ca14bac46de4c1349aae3776dae5459c9fc91a18995ca3a2c81bc74. 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/BRFBE2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036bfdd2a6e573001c7dedd051f70f17ed4c1d507eee1f8d7a6446ace1756459. 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/BRFBE2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc572b85106fb7a2dfc5a15d526f1448d148d5214863c6d162e3c214a733d674. 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/BRFBE2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6f532ae3c674b2393088ba80d10b0b6c35e9916398a0a2580381d15997d0bb. 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/BRFBE2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee15bd769ab1c9174bfe4670b6dca0216ac318bde0c68cc1293f8377309cf28. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BRFBE2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba6abb756aaba2398863f063535ba925e918194756504771ba43472b991884d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRFBE2400025.
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