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 0x1882ff7c84de225da496d4d493e4ec79d467108362e662d35c00d166dcd8c510. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9955ef2-762f-4a88-bece-e9e119fb20d3.json and https://artists.proofprofile.net/proofs/artist/f9955ef2-762f-4a88-bece-e9e119fb20d3.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 0xb9e8d584866fd58be853bc57ebf544396d5fd294748debbe5540b48f7b7f7471. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZFZ42424152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0ccfa8c3acc21b2379337277d43404d26f79a844af44b7f2a148e75bb8fdbe. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHNB2447684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0755ecda5205d6a423af13a49e59e8080f86ea2ca945426d1f6f0d090410b83. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:56:53Z), 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/QZHN72400503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0ccfa8c3acc21b2379337277d43404d26f79a844af44b7f2a148e75bb8fdbe. 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/QZHNB2447684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f71333d1d0b8f77cc54a29d0c66147bc489b33d1b1425821b6d036aae04d08. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEQ2491918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe099ec667d9817c5f0d0c4ab8e285a77b50278cfb8809c8be02df3b8be3e0052. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZFZ72474135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adcb1f7aa1beae3ce20d85ff6e826ffd23642fa2fde7506ee3a6d090513c104. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZNWQ2422224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9b1de9fbb54d73c6e865f65b1b63738cfe0e2b18cedfed9d547ea61348d5e8. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZDA62461581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16219cbda4739e4654c82e8c39179e10179fa68cc639c2f4be45b6bd18b38075. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZHN82433693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b0929a6c5c79627fae878ab854e8120c1698a1c641d77215d7cd5e4b39ca71. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZNWQ2422225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0755ecda5205d6a423af13a49e59e8080f86ea2ca945426d1f6f0d090410b83. 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/QZHN72400503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb655f5eda8ec51f6146e4139521bca91534d051e290f342a7399b2620e1acd76. 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/QZES82449202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0ccfa8c3acc21b2379337277d43404d26f79a844af44b7f2a148e75bb8fdbe. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:46:57Z), 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/QZHNB2447684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706700dd9fbaf75cc680ddfc0519054320ef4ed16026b6cdc9d166cffed722ef. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWQ2422223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adcb1f7aa1beae3ce20d85ff6e826ffd23642fa2fde7506ee3a6d090513c104. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZNWQ2422224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dc5c31834bd135ecae0327fe7ba97d8897007adefabfd47fea9c19f6acd74b. 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/QZNWY2420646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7169bbfc3e6f98e302baf768720358aba5763b815ba68fc821739a8cc7a755c0. 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/QZTBB2435569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d52d0fb50cd4f0aadeac2fbd0ad4dcb7646687bfed83edf26e5555057e98bdf. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZNWQ2419006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1147be726b9e7ab8db17b3f1c88d6c4c2b4299451142f557a12c5749ee992171. 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/QZRP52479354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfb2deb91a40a8b53ee98e74339de27f3e5bfc58a32de4d6edec0b6625cea56. 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/QZJ842502755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ef1eaf902c391797c2a9ea184c0b868d0f078d86231cc0bf89de0eced9bd52. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:51:49Z), 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/QZJ842502009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062e24076218438d267bcebaf463269cfffaaa8dbf40991bd2db426770afaa85. 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/QZJ842503198.