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 0x8c9ee22fc5b0a705e37574f7c0cde71f3c48f988bcd9dc3c666c583c8fc96465. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b412251-4877-4ea6-81aa-e6e2c87a8cef.json and https://artists.proofprofile.net/proofs/artist/3b412251-4877-4ea6-81aa-e6e2c87a8cef.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 0x8299b5f6d045a1be0f75db4acc81a8124b9c82950725fdb415484c3c17260002. 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/GX8LD2376150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbc6cadecf8a2623fd5480bfe0fc378a3d0ee66f432a815a692d27fdd7491e0. 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/GX8LD2382359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3ce27a4a3bf88c3c70728c6e819f5d5591618a8284d8f0d5d1ad24636167cd. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GX8LD2356368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e999ea36f9987015c5fe758de8fef4f7f9a639de34dbbe907495a73cbf70ee5. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/GX8LD2334967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd910964963dbebcd2314345f463632c8a41b99877868c4c82a17365cfeaeda84. 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/GX8LD2373067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a186fe097cc7b17368d22ba667e03d302a7f955b0bef9302b32c71eab213716. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GX5MX2263696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f49485108dfa01fd8704558b4f1d4a52bd6bb8bdb838220a9cd2265a63a7ae1. 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/GX5MX2263697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e539b57cbe769e3776bba1a145770b7eea301c61c5fcd0f5ab2241e45ccf8d2. 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/GX5MX2263698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2ba5192397d44093f29626c392c9f1f6f88bf0a35b59cb5b325a47569f9f7e. 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/GX5MX2263699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b7f5688765a9921bb2b836e331481b857d8c945a389c271168a49f9aee679c. 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/GX5MX2263700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d2814b53bf4403ab26cd41e8052e3ac9cbf6648e49b981d0fcc39ad19a76e1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GX5MX2263701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756b27bd38d07d71c8d6627a4c984d63a333106ab41fae3df4a6ae51be46d005. 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/GX5MX2263702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d3f79e46ee842f467eb22e872a5f76927eb20b12ac88de0b9d5960c316fabd. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GX5MX2263743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd9f44eec16792c132280f89c02d5b2a884a051213d493fb8b669e4c4473f1b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBSMU7984929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa432812912e6e7637397ad810863b7916f47227709cbfe98ade70dade456b730. 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/GBSMU7984930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50b91adb8520f1840bb14af3154fa4f9f1744bcb352367c274ed3377f2567c5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBSMU7984931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb298608844bed71eabed6d6b309792a4c8dcd69fc3a339841bee42ca3967c5. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/GBSMU7984932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dac93df5c164c58b1a3b5e5155e03ead2db3a81521893bd4967df70501529d. 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/GBSMU7984933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e529aa8f21872c045c44eccc5405d10e4df8547c94fcab297d2965de84713e. 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/GBSMU7984934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abff5271c75cb63f85aa95684b9de469539435cbefc3029e457675c1c4c63be. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBSMU7984935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660e2beaab8a7c6fe0cf1922ecdfe56dbbb4b31eb595fae04ef6c374e85fb76d. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBSMU5072893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb201d1348336d0e2b88de70804371459545aee5f3a6d958b46567956f970581c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU4966636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b83a63ba83e3f5c19202a85bba98686d60a0bfe83fd4dba87b6c257ec0debd. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBSMU4966637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f046ebb5bd1b6419b130ef47deb63bf46c494b5a9a1e2747156d1092c46ff8c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBSMU4966638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ccd879af81f1e53281dcb057fa824480f93ae6299b3b747e0153f4367655ab. 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/GBSMU4966639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e55459a23f9cac3050e6c987bd6d31e68d5fa0bad8cca56a40649d85640e9a1. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBSMU4966640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa25be891d2b6807f767e3bc1049c8c075e01d5f031cf05553fc94e278c008f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBSMU5072894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27fff9ee1971ff25b241af6432be844f5f42c1945fcfaeb7e632683f8d52b0b. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBSMU4966616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1896e2c52d664540de2e65678db4d7d112fe4abcad73e5acb6088756ed81b4df. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBSMU4966617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9899ec1ae0fd02e724f1c29695c8b2d8ebc74aadceb53a12dd8eb6678344dcdd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSMU4966618.