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 0x34e8aa45680a7406964a7d909c93d1143967c1b20a876ac7ce1b5f7bff2b6782. 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/8f704b4a-a1fe-412d-88f8-f6d5397acd81.json and https://artists.proofprofile.net/proofs/artist/8f704b4a-a1fe-412d-88f8-f6d5397acd81.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vs. RetroSpecter Part Two: Infernadise, Vol. 2
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 0x50b6a88810a81bdc5f18011b656a5c3ca84595662a0af7b0b08812f01b2fa35d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QT3EY2533388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6b24c7e9c1a297ffc5f2a0239d9be7e70b65a5942e90d6309710b79fdc9118. 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/QT3EY2533389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b3d20109bc096bfad0327a8a939d861e340097e3726bcf5c75b156e468a7a8. 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/QT3EY2533391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecdd9304b65031a5dd4996e5ebde3782a906705df83a22791c17f413277241e. 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/QT3EY2533392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bffcc7d4181e6522e420801e9f809c6483848f96bacc4e45c9fd130f369493. 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/QT3EY2533395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e5117b03fc97bd0b0982d0099ed41717c06663dc59dc5b8442ecf9272e20fc. 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/QT3EY2533396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf424b5bd16760acd469e248ee29c02046826c7280da7b93fb1ba17a5e1bc415d. 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/QT3EY2533403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f2157be0e20250b4c33aa2b87e22c816e790ac83f5d187c4a5d82b9e2b319e. 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/QT3EY2533417.
Vs. RetroSpecter Part Two: Infernadise, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7912c76310c041eed4aaed6fcc5a23a0684b7b41525d08b90e515d8d0a2c16db. 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/QZK6L2137057.
Vs. RetroSpecter Part Two: Infernadise, Vol. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca16a9070272bc4b4604a2148b80311b2e4f491c00bf15365ae84232055c01a. 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/QZZ7X2578120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27828befe49cbf3d85c14e4ae7abcf18f2a4bd751a7cd365eb1c703d1c3058c. 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/QZZ7X2578122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f3ecfcfb96e3cd8672abc8faf6b8e9f6d4375bb651882959f70cf806a1c068. 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/QZZ7X2578124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca21eed5b73f2f6700cf4fa9d38e239215753cf9cefbf9605890d300ac57d3a7. 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/QZZ7X2578125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc5b792f9849a7fea903ad57126ad8e8fd87cba9d4ce208233c7adb2556d98e. 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/QZZ7X2578127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d1ea3ce29afbea89e74044a565e836f03632d974612165dfb7069ceecfe619. 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/QZZ7X2578130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f04ee2b2b88e018210739b7bc871f086fc8a1f724388a90549c649683098c10. 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/QZZ7X2578132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fd682bcf4ea351bd5887d9fe56914dd21ff62693100d5a80c84c1e449f9d53. 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/QZZ7X2578133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dee6dae28fedc23b4678948028c872423fa212c631af04802fd3ecf302b833c. 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/QZZ7X2578134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae87586d07c90b1f0325026830e8184767bb1a2b117c69eb4920e49c019325e. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZZ7X2578135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cadcd66c7a0369fe8b392183cc127c4ec03c42ae47fbfc1dacea57c737b460. 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/QZZ7X2578136.