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 0x91ef8f19e13b6b6c73f5d5d6954ae2c45d799babf11ee286fd3f18fa1c2c578a. 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/fafdf14b-f4ed-4a59-91a8-6f6dd2d26e44.json and https://artists.proofprofile.net/proofs/artist/fafdf14b-f4ed-4a59-91a8-6f6dd2d26e44.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 0xbb0c96662ba105cc2dab92763b7ca092795a4020a386d8495afa85d5c88ea118. 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/QZDA72171887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54603514d37f785ee99a3e63bf1ead545bf62a1a2cfd9f9b7a348eac8da15a86. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWW2096013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fe43de382133248f2e7bda5dd82a8c8bd39f6f7ab9b7364f31e28334bd0ebc. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:51:16Z), 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/QZNWW2096027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59998a42e699f4fb1e7f11984dedd2399abbc89a6df729f8497b91f6f9117785. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZHN52076055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c40b25b3ab00de8cb1cbb6ea32db858eceadf366beb24049283ddbc2eb7b34. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:55:22Z), 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/QZHN52076073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d223b6f85bf380834bc3aafe076684efa576fb81e616b02043256178264aad3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTBA2335956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54148b9b9cf9b85fcb631e84301cd44a771b28807482f6ab6a8bdd79f972ccaa. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFW2451928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf339ff561c3b49a206a826a372be37f55e6c0890f68de8563684d29bb7f8baf5. 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/QZES92536275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0ffada5d0b6df91154f73a1a05a1bc04e220513e24b447bf82b3e2ff2ada13. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZNWX2581610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee19c5ca2880b39f202d1d13f98ef6eb7a41e830ab3744cf6c9a24ee01c3da9c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:02Z), 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/QZNWX2581611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97dfe565b1b2798df31432a7e5e60b2a3f3942f434f498ae5c93622ff8fa4ce. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWX2581612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b0491de2bf69a0adcb87ebf0ce31df094fea7426a4c9eb7a2f18abf9724f62. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZNWX2581613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5866ed59c25e08471a97cbb965ec986d5bfe7df8715d4e8c4e79252106bd39a5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWX2581615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfeadf0e51eb06a66330e5b81d8e480d90f085d10426ad80fd7eb81a2143ce13. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZNWX2581616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da5fd42c18497712fd78aabd4ef806a39ebdd5c0066a4dc6c3530305b643c20. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:51:32Z), 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/QZNWX2581617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a35053d9becf0eeaed3aa0e3a5ec99305840816cbb5e540f5d9e4b5b50eec68. 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/QZNWX2581618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651cc02e97142c321eba2f6c59e8408b65ad315cae29ec4d38dc1f9c995b4c3e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:30:11Z), 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/QZNWX2581619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d38d48577b8eb871f7bbd00378059411a798a41a85ccc6d1ddcd6144bf544fc. 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/QZNWX2581620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd254c8966458037cdee107f35f9dcb8c7f73a88d86c6d7c940049e577a1014ad. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:59:19Z), 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/QZNWX2581621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53d46f8fd45498b053621f7bd9cae9875b59e749548e53a8339e2b0871d486c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWX2581622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21a014d5ad8bef226a45386a2e81473c0172fbc02d4c5baddef2030871cb4fc. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZNWX2581623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c493d020aebc5fd60903fdfbda6376e76290e75865c8d0e425cda081e59b0b2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWX2581624.