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 0x44f3a023ebb8d4e6167087cdad3bc01876531ab150fe362d1ad19b7fdbf85aa0. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e462e10d-2503-4969-bf89-11d868ea8bdb.json and https://artists.proofprofile.net/proofs/artist/e462e10d-2503-4969-bf89-11d868ea8bdb.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 0x96c46be14e2ded48c83799849fbcff1e36dcb662a6d1004e98e3d4772d2869d0. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:32:35Z), 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/QZPLR2239536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a087cbfb41a19757256c0c77c75b8988da272958be78b5b12f30163a427f46. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:07:25Z), 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/QZFZ42326389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedf6854b58551c36e86404c572e4c7c61051e35399d3080a1aef683800ec459. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZRP52314290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf4120ffb6844fd4cb33fd2ece0972a5aaa31fc974f3ec7ec5204942459cf2c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T21:59:44Z), 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/QZTBD2344930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8632e61d63f3003a8100455465ba878dccb17948624e7c5118e207cd7d8802eb. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFH2360069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19930bd01adffe51366ef0f31b0cf7a0f043f45660a4695dcb649d047af09668. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFN2321793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e4ffa51daf6ba4829e75b6198f623440bc27422f1b3dc462b405d57245381f. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZWFM2375580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d2e0700fcb5482d5eb00d097b0039eafcddfac24ec205947094c644ee1d5d2. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZFYZ2499642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b48d1a1149dc16153f1705a5d643f50488fddfe7d9ea7d6449e5e2a7cf0ea3. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:44:11Z), 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/QZMEN2445506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a77f9d8626b4cb8d964ac5e360d37d8f24a9e035827202edd092ea9d47e894. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZTB32487943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90edd8bde103a1c7d0a9d89db6d9af1ab7735b143a211ee2968d0caa339d0f31. 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/QZWFH2445569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41073e4175c784bd79b3b4b602949a6f2d48fe7b31ee19ab0aa26a1e3c0c0ce. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6P2565404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2738d8a22406745fd1e02ec416cb81014a7deff901860be43378a296731afbb. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZMEQ2534522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23350941d3fcdcf12cbea9254689668f454a06954853a871912e0b64d79cfbae. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZZ772501426.