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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576e6d2c4ba78f6c2ce506ac3af3d059aa83aaac7f127eee2d795a35464f831a. 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/db939ad7-f682-4fde-9624-5831d5c5488e.json and https://artists.proofprofile.net/proofs/artist/db939ad7-f682-4fde-9624-5831d5c5488e.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d438bd83935f34d44a751449b2113291747750c4471fb8892dabf8b1a60551. 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/QZHN52291282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c720c67663752d9000c085b85e893c54a3678c6ad3f51889596ed821719815d. 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/QZHN52291288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5085cf9f0d5e20a4ea15468f093239907ea6e80315d4391bfd8cd2c976d9ebc. 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/QZHN72365088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b4f12ebe1a8d3dc0f588ddb8c91fd597d356ac77ea1e117ee56d6e0e4666df. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZDA62370125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5085cf9f0d5e20a4ea15468f093239907ea6e80315d4391bfd8cd2c976d9ebc. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZHN72365088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd282304fa95ec8f58ba83de6c43473ab8fdb507c711b0172cac10fde4fc99d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN72365089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fc39b8601ddb82e97567f8c9da8a9288469eb89e0e7cd749c5d21d43ee24fe. 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/QZHN72365090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0499b46da1b5891c44ef41699fffa2a29d13f245503ec2e81e656bb6c37b08. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6N2360923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01fb6de4a66d35ccf42f8b0ba44cf0dd7fa92b6cb119ff664d6e4c3c570e3e7. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZK6N2360925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acd38b40f9b3d2d3e4df58bbe6fb481222268bcfb1de9b9027e65babbff5eaa. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T05:20:29Z), 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/QZK6N2360926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e202f5cbf26fe7aba641329853bd44142eeec991b73b7c6370b522adb2d0aea. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA82449786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a04274505d3d837bc7cfa3905326fee1e6389f51bf9399613f6db92fbd3f3c. 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/QZDA82449787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e3d09b5ec6c087e6b67ab7ec7e1b1f0f4bb44f0d3b06fc98871a5e8745b3de. 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/QZDA82449789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afe6b021f87b900cd0557c1c832fe8abef39f24423be72fff6b02965e7a3e11. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA82449790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecc4782265f5a67ff88ff1101e31622fa5d39650d94d725d62482d6d4add064. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZDA82449791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cceaf8e723c88fd56d8d502d963080dff33a66925a5d58d08bcfaae4a4b7d4. 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/QZDA82449795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775450b3cfd3737cf97e7674d295931b28c761d5b471d5d7bad500dfaa399964. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZDA82449796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff736673a501192da14527db22d4390e4b278e7c7c90672c2803034d66ef7fe6. 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/TCAJH2529058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b34e459f3e77129bef63b0dcbbec734bfe571fbcaac567eb13a191df68820ad. 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/FRR642401437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1782226a6f461c7f5ba4c64c0a8b297a9c5f9b5630d78026ec9b14fc3a6ef9f7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES92457120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312092b6fa34c10e580d07915f088867469be0036a90fff2f5cccd7a261074fb. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZES72419296.