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 0x92c9d999a6af1cc87564ed71d882131796ec3227d107a8c4a0b1f5f780921e21. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db984e9f-21d3-4ddb-a37f-72a34dac5c6e.json and https://artists.proofprofile.net/proofs/artist/db984e9f-21d3-4ddb-a37f-72a34dac5c6e.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 0x699a2f99a5ef2a97253c7897e8d7d1cde94a1edafd095f24346436f34d9aa74c. 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/TCAIL2431513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cc615d12ba14c513b99ca35d9b0713b16b7c52167fa10574c673e9c1b0005a. 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/TCAIK2431519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb822e6acfdaf1ad9af087fa591f05df5ed2da1aaa6c5264ce75231f4dd79b6e2. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCAIK2431526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d771cb4fa07865a449a1246c1fc84dc77b30aafffa3e85bca1d1f13d46849dc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAIL2431528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff3df00184f6a9fde181d64620beaa009f45799767ebe996166624d4b068e0d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAIK2431530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a0ead9db556632c732e2cd95e6ac8d72e9a796f878b7cde9887b2a49e5c3e5. 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/TCAIL2431532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6291f617418394511ab0a61cdeb9c11a3469ed5827721801814c1b71aaf26e5e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAIK2431538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6117def2276fa19cce3fda3e31509e00a7501760414b3d6a23641ab25630bead. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCAIL2431543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77cbd38d4b45a459b6b2c1021d7bb66d098c2c649971a2ce58820289bed8aa8. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCAIK2431564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf09806b452e09b6176cfcc6c8eb50126e68d08bbc447542aae4731f7f034e1d. 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/TCAIK2431569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498375e96f95b70d71dbc2f19785648af751780e5d82e15857a5ea266df8088a. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/TCAJV2540747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d1fcc03f633d8dedac8466ff2984023a20e8f064185ff9154f2fca3d5946dd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJV2540670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0446dab228d1a05197dcd83dff1acecca8312623534d7e25b7e3b9a07e1c9527. 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/TCAJU2540678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09485c97e460ef6c40b0d7829ee44762d88f6dd89ee387d6f22dd658f9a89b2. 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/TCAJU2540683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8733d3157936cb6516d2c3ebfe865df7b7fe5cce22f963a1242f3a66a89255. 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/TCAJU2540693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9162f9d8f50e741e9b450ded5d92cdf3d240a6074839bf2ea29a37399dbbc98d. 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/TCAJU2540701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d97a2b836cc689cd679a8ab9368f651a7880b77c36e709fd6b7fca45a25bf4. 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/TCAJV2540709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8c4ad720bff7a2bf8773bd0c410fa4681cfe09751ffe24e19b87d890f1f746. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJU2540717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9f7a4a4f1de457af45e1285739d5c741f260756ff04d4f7b0ea93b737d1732. 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/TCAJW2543781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ec6c7289e5f836955134744d1a9f0bd9dbcaeaaabcbfd22fc71e6f4b63b787. 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/TCAJW2543792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e0546444ab176175e1ada3ffb8e355d39fea2b45102e9293e78565981b9b79. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/TCAJW2543795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39713b2aa155bafe366e992e20990446ee1fe92ed38b916cf831f5c7175c4ce. 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/TCAJW2543802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76cd3b69e166b268d62fa7007eb65b430b3a8795038befc563f8a0153e0ff99. 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/TCAJW2543808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3e46bf642a9fdbdc7582df65d2adea7ae5bafca55c2c5cb1244ec5b731edd5. 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/TCAJW2543812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0aeada9145d6702d88a7d25c7914728ce43cefd674c1a45a43f011c5734d801. 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/TCAJW2543822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3d83edc398eedf740e7351770710190892924529c4ebc24f0088d3737a25fc. 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/TCAJW2543835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fb3fefd7485abc2366d2b0bc6ed357bd30f1cb93ed163cd3332cb3fe2a363f. 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/TCAJW2543847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3659fbd50d3d13f88ab88745d801975bd2451d9f9950af33bce0d9ed8ee33bd9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJW2543855.