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 0x2fa6c116d2a2472bb911b2af9d021467815604103252f4247aecd3f0a1ff6d7e. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d10ad23-2677-456e-ad82-f6d45bb9e642.json and https://artists.proofprofile.net/proofs/artist/3d10ad23-2677-456e-ad82-f6d45bb9e642.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 0x7305e5f35c9c93091547a2dbd4857eda60bab0496a0ad69e34e0a7b95586421a. 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/QZTAS2479088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b2cf83c42ab526588436997552bda5d7caad5be58f15a1c6e23c2435e9973b. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QZDA52431088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4e9c8f6b7a89abdd03ee8217048add81c07ee116fe03bc7cfa565501c2f46a. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/QZK6Q2486544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05093cc631c943488ae3b8d7405b1a75504fb76b8280ce19dcd01a80ae7a8814. 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/QZNWR2482228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4e9c8f6b7a89abdd03ee8217048add81c07ee116fe03bc7cfa565501c2f46a. 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/QZK6Q2486544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b614fa5ef1b40355b4fc144888e2bc67ffc305a2064bd27441ea0a12223df4c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZHNB2440803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b2cf83c42ab526588436997552bda5d7caad5be58f15a1c6e23c2435e9973b. 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/QZDA52431088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba2247137cf07cf712fea86e2ff629b33a6088366f8beba2a0579569c9a276a. 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/QZ5FN2313796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afe290e4264bf022d39b0051bd481cef50d3885fb07ee18870b4932ff592746. 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/QZQAY2262526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e337295e531e7df453e46173ca49e92370845c4d6d4d9b6f832ab83270b94da. 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/QZTLA2204575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128e378e5f37183064b180d78545dd376c2b037604e1023d530d724d28d98a8a. 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/QZMER2115057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c07c6f1f54aa2ef45138a955ee0078354a1764d55dd719e5e1c495764e8480. 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/QZMER2115058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6929ba140a64c3feb9058bc0e603567ed6e0c41f21148c88e69a8096019ddff1. 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/QZHNA2173081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d15671575e0304b630a8bee1b3e193fe48c28a9dc969834b0dc709504c5025. 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/QZHN62140814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636a0a1e6235a2345a698c58e6cfb30dfc92e0f6f46ddcc9aad8733279323caf. 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/QZK6G2031481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a042dd2209fa764328c05585371c316ccc2c948acfb3c84a28a971ae3ea5de7. 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/QZFYY2050141.