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 0x37007a54e8949af1bc83667a25901bc42c45da526f940872ab19a13421bb6684. 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/0adcc0bf-ef17-4ae0-8e03-764cbd6dd4eb.json and https://artists.proofprofile.net/proofs/artist/0adcc0bf-ef17-4ae0-8e03-764cbd6dd4eb.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 0x54deff518906bbc8a7bff0a4246334338fc230b55e854da7c253f89476ee795d. 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/QZTAS2487193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db1e44386714712a698e14082b1c8c16ba121fba9d2e4886c9822b323c0455f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:15Z), 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/QZTB42498118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ac3f75f2091f51c949f68e9ac1a69a4e2779e49bd7f0fbf9803a8329071b3e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7P2446956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6755c1793a41306f82488b929c008db5998d4180dd596b3c47a85a8d038013f. 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/QZFYZ2522273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee07b38fc63e3c3fe7dfbd9eb4d30af4361469f94e2af7533da0906f4e568c5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZDA42524809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01607562ce2e7e8dfb84d9c9455dd5a294ba832541896a346a3575fcd24bd962. 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/QZDA42528050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d1f0909759b4b7fcf1b134d831c01445c37af4c041bc718219b2191a6ba1d1. 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/QZDA72516101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cda278a6ad3ac4a65702112bcd7ad715d97c7240c8d9fb77e40cfe6b8a9d90. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:48:29Z), 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/QZDA72517453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07df83c01e8672580a76297bd3a8a452a35afa276ef79af7c80728bbc34b58cd. 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/QZDA72569743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe771bad574ed1424be301b659147364c0496e5b701458fbe52576db096b5f869. 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/QZHN62561124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7038dfdca7960ab9fa532d6b7f23dc5a0c5e11c114209e3bdd9dbc0dc45141f. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZHNC2519323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b29be568cf91accd66dbebb454aba5e0830d4570c146fd5c5b1c5c58902da8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6L2538940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b990ab42dcba553b8917d4f549019922c6077716f8109142a4aef87fb81b46. 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/QZK6L2538938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f66ffc6a30025c173d04e5f2c9227a38361baee3abf606ba118aa1e0b5d7d38. 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/QZK6L2538936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf2dbb05f9d376a1861033da78410252b0e2d76e888675cd8a7daf332290a13. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:52:24Z), 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/QZK6K2575236.