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 0x64c747f163e1a5090e1e70cff3369fb9afd43329a7648b3c9a135096d90cb27a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d28842b7-0443-4bd4-bfb0-dcb6177e5a04.json and https://artists.proofprofile.net/proofs/artist/d28842b7-0443-4bd4-bfb0-dcb6177e5a04.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 0x5c978e9fe1e08fb52fe32b3dd25984626cbd5cfb31c2d728693070e50711aadf. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAIQ2427421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663128e33041c3ce2fe08a78b9b18e8af617158c0ac6621753c5c9e41908d3e3. 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/TCAIR2427424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb919d59cbe159bb32649aad38c6e2f2a3b63ecaacbe69cdf9aca97374c7d843e. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAIQ2427427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe725ec62a58afdab9fe16b69b85b241c202f92e7598b3ced723384f72cb7534a. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/TCAIQ2427432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d8dad8d332f4782d26d15b099edf9cb7a8c584dda5f843b7db864d5874e6dd. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCAIQ2427439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410a05f865737de59fb3d1a0c06f55a0c5e26e3f782deb7044f3a4e55541be43. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAIQ2427440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde69ceeb8f4b9af7f5c1de00cea121d6974bc5c5c9f973135e12d19054406355. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAIQ2427448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a750c943cf085886305f35912ae16e1343b2cc04585b5fddad0966c4a0234c1. 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/CBEYJ2528855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fe6a2c85f7fd7b9759c830d7428a4ac890c88358821abcca3d95199e886e30. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:35:29Z), 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/CBEYJ2528856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06aca7d2c0f83fb02fea9125cb61e9c87293260d30e6394a92bf17c6500e58eb. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:24:04Z), 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/CBEYJ2528857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283e5ef50db1c1dd30c75e41946766e1879842aad02a48e0f73034103eac22a0. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:11:30Z), 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/CBEYJ2528858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dedac5c9eae4c26d44eef8602143b9350c3f2c8b83d5775d5d9c81a006a7fb. 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/CBEYJ2528859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98a768464753159c19575ca2637b4736841680a4ebc209fc96960c71e43bcfa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CBEYJ2528860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c9b2a4d5f4c7a578c3d369fbde09a631268fe9ffd6922dfce5be4bcf41b575. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CBEYJ2528861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ff738e5f6edea8034856faae91ad1e89db9dea4ebca2de0c7dfb2bc43243e5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CBEYJ2528862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bdab0ca7044994dea2cec136fa8d748f602117d06010ffded868d73e057648. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CBEYJ2528863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b3cf4878d460b7d7c1db68ab221b3e56e229c68a830b458579ba79dd3ffc95. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/CBEYJ2528864.