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 0xb14bde8a0106b157304f67cc1e9434ba183f3280d2a24827738200fdc5005a78. 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/e16e93cd-b62d-4bf7-aa67-a9f6869b25c8.json and https://artists.proofprofile.net/proofs/artist/e16e93cd-b62d-4bf7-aa67-a9f6869b25c8.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 0x73e24203c46ed4fdef7acd6685f63e075c3095c0f5cdad4546f66ca6b13ce0dd. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GBSMU4404160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5d2642a4923256aef600aa6e0023efb95ac7dfdb79b0a8821b040d445312fd. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/GBSMU4404161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bc47ac591cba3a34fab43b1906b1a758b92c1bbf08c6f419b55aa4b9166679. 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/GBSMU4404165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1460672ac88fba1e6c7ca7d6fb35180ac363dacf5c29d839fccdf196962b7b. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/GBSMU4404726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbef9765079095debf69064623f47dae70f0a1ac48840c40c678551908287b7. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:55:49Z), 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/GBSMU4404727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a6af6f4ecca8b21174bf09f3db531612d16ad9b6d24ef812aa7bfe0b22443a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBSMU5200583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf212a67235b7bf89215688747286d9437b9c17db5ab3c2b6527b7ca5d82e73. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:29:26Z), 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/GBSMU5200584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26238608b62aeef0e9a939f3f3e8a297789f23ba18460d2aff036565f1651ec7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBSMU5200586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1200413f6553921f28ee90f4856977574fb64351b2c98f4e6eea95f557adbde4. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GBSMU5200590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ca8371e71a4b8b70f26a893517fb355ea3cef833de537429774833bb8fbf27. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/GBSMU9512314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b15066cca479088b13afd2b00b7fc2e24a7cb1b45dece0984573b169e019d98. 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/GBSMU9512315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d63d74c046198005689a9d23587b2ce5d09fbfb7a29c426f9edbe1f271425a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBSMU9512318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05d675b8c590e2626ab726a37ead9bd2f9a4c621fce38c927a2be9b3ee03777. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX5MX2192681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a5bbd1286527651e573cf07fca65ed5b5c11a8c43221e618dffeb64be091ef. 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/GX5MX2192682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafffd90898d1dcaa4e6293385871cbb355c212c7f6d7e1931d97a669646b6645. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GX5MX2192683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c3e7982d9b1794382463dcd6b36a2b0f37b03ad08410065b22c301b63b3322. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GX5MX2192677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43b82f49247366366226020114af15706e368612d809a83e265389e1f6980a3. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GX5MX2192679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a3eea098c5ead110ca84f91019754f930be1a0a8d6d8c571c679c376a8602b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/GX5MX2192676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc627e11fb8e08dd01ca78baa4132a3dbf0daffa3d33717c8cc77a09a3f1794cd. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZES52434173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69a8fcad96c576ac6611f196113cddbf188bed2ae2f064659fc1413ddefc1d0. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZWFR2369383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1dd63691566f20241782ac02e7bbb3e077a19eadba64bf95acb9c892611faa. 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/QZNWV2574773.