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 0x5b22a5fe7ea28ba32981663015eec40d2f9afa5f7962387852afcc3ed808d493. 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/88ffedef-27fb-4488-b501-6bb9adb05126.json and https://artists.proofprofile.net/proofs/artist/88ffedef-27fb-4488-b501-6bb9adb05126.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 0x9db4e5af3493869d9255ad4d7a560c68549902db5a53a7dfd7665788f435153d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GXBAV2288039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ba7fd084f82711006a2874671d3149788e1b7304a179ae02d846fafd86e786. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GXD7G2412161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151a72c5badadf99d5bad4734936b1cdc3001aa0f755f43a4fcc88ebc7b72121. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SGB502459128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3175ef4a2cfd781b792620d9ae42244825ec03d281ddd77fbc16d8daf315d33. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GXBAV2391775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4b73bf470c63e18853915681463fe1b59d97762a375280ece8bbc1399a4de0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SGW502394929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b41b4edebc382c240f79b58283252b88f9fe443df610df77d006ef44026a825. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SGW502327502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf624462cf81ac1ed6b2ed40f276ebab032202392f4f080bc68e60ace60bd6915. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GX4LG2100689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865a8ada3e31ef8efdfcb8d067c8055fac9fb9defaa6540f23987eade4427bfa. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GX53U2009796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3572d7760d2b187150113f6ef8bca72a1c86977b3b14317d2c342ce130066a7. 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/FRX452103063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1280bbe09cd8d93430d12f9f8ea71289fdb0d9ba21d54a32ef4ed052eacac28. 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/DGA062027019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37ac11db341e8ca0ef2bfa82150972348c0b890be1b1dc8644e2b0db5fb5197. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA062027020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e6aa1b95318d4f33b83376fc86968bf5d7d79b753d2ea70d13a81ac1d82004. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA062027021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a56b285e72f0bb1b02688b3dc9d6f2999e1d3f33604a7fa07747535a948bed4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA062027022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e94456ebb03d3998131d0001b75b5ca7dbee2d4efe756739060e3c0db54b92. 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/DGA062027023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02627b6dc5b81a881bec242248bb34dd050ff46388060ce111e778a633373cd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DGA052047332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f86ce485fbebf656ea5ebcfa5c36889a7e5425d6a4dea531b4e146a45935eb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZYFZ2488127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b1b59e208e8e9933374b7f3f3c159e6f914e62c7329c7e368db15080c2b21b. 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/QZYFZ2451958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f774758b825338eb13e8c5b5b4853a8d63b8ef8ab5c813620ee985a98d3eee. 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/GX4LG2100542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a7e1f7b2e9f404fc76c65fade5a658028f162c7e0767d0586e4c070c60678e. 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/QZYFZ2488125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1d7826f84d5fc0d057a4de0a47b306c87f7abca2e8b1480b88691e58d9bb7a. 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/QZYFZ2488126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf624462cf81ac1ed6b2ed40f276ebab032202392f4f080bc68e60ace60bd6915. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX4LG2100689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed8a973b3ff3bef33992d499f57c0cf3c68d7881337af3354c3ee55ab3a1f6e. 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/QZYFZ2470721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed8a973b3ff3bef33992d499f57c0cf3c68d7881337af3354c3ee55ab3a1f6e. 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/QZYFZ2470721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b1b59e208e8e9933374b7f3f3c159e6f914e62c7329c7e368db15080c2b21b. 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/QZYFZ2451958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf624462cf81ac1ed6b2ed40f276ebab032202392f4f080bc68e60ace60bd6915. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX4LG2100689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f774758b825338eb13e8c5b5b4853a8d63b8ef8ab5c813620ee985a98d3eee. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX4LG2100542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea91242c02bf6233ee545211820e31fcbeab4927f3a05d9a517f05088119b9d5. 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/AEA3A2481227.