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 0x1e928a328e36f847cb5ea7db851cafc825156cde767f91b86cc440d9af476973. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a18ae6c7-6d98-4f2e-949b-a5d26a8d7baa.json and https://artists.proofprofile.net/proofs/artist/a18ae6c7-6d98-4f2e-949b-a5d26a8d7baa.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 0x364a5be3bcec901b46f7f98909119bfb11b39374722cf230e8028df42fcb520b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFZ32540428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cdb6bf4bcbf420a1ec3c85fc309324754ed68d89064dd49faa976977adf130. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/QZFZ32540430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7855c88b8a49aaae2f41146ef89176e709a143fb45d2591e6f422b487d6f0c81. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:06:29Z), 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/QZFZ32540434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4f862ff7515a43d4354d4268c5bfe06b1f4f8155100e45c4095dfe2e9bf847. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:40:02Z), 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/QZFZ32540435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1652332144c1b348e3b8ea35b4f18c82e06dd6363cdc24bea16a908a46522c. 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/QZES82505211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3da541378292526db2460b562ae8729fc0c379a2799a4bc8a55986152ce76b. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZES82571979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3da541378292526db2460b562ae8729fc0c379a2799a4bc8a55986152ce76b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZES82571979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9b52391a8e6a0521233f065f3e27e9197650cb51a8bb71984e0a550b406650. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN62576307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17493effa6adca4ed7ddd7df97193c2c9545feec7824e530f9a04b35d4225fca. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:32Z), 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/QZPLR2579134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd978c54b4ce3e12731445e61f7eddd61a839f3523b406749a1c8fbce2a8ae4ef. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZPLR2579135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bd5a80020ef706eac3b5a24d854e4d1e17f81e62d97e03ec99cd38e6c08e2a. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZPLR2579136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ea3ef78a3e895feaaf445662b090e0a28b1f1860f98226134c159436f7233b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPLR2579137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbea5418ce222922741e2a2c888052179f635191b8abce9d3dd8d17dd2b2cf75. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:54:52Z), 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/QZPLR2579138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1652332144c1b348e3b8ea35b4f18c82e06dd6363cdc24bea16a908a46522c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES82505211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2f5b49a6d3efedee2c42f94a64e8a47a3ee32b20b9f94cfc02b3fc751597ad. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZPLR2579139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff683a5ab87d9fc50b313132aaccf9f9eb0a3b9d2ed535f67d77af777cbf56e9. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZPLR2579140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb685f9fd488fa76e3cca5ea45909e3c1842c7a3554edc30a29ee92cb9d90949b. 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/QZPLR2579141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb180466b2d9f7b1fb4bfce1a5a27abe2cc8ce9470e9faeb06170be4255bfc69. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWFV2552901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0533d00435c0b0a585071114e8af6dc547943623e700ec3361b34b116b88a4f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QT3F52505873.