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 0x4bbea317b7cfc46b556dc684474aeecf79e105ac94203d3222dc52bab4cb94c6. 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/69dcc232-e615-4410-bb96-036dc261b71f.json and https://artists.proofprofile.net/proofs/artist/69dcc232-e615-4410-bb96-036dc261b71f.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 0x505e3b67f98484b20c6c2cf3c876a2df001ff9954b13d6f8989558bb5510d857. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA52022657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b352eb36c92029fd4794fe237b65c32c7639f73c15157b03a0f606f3661d6f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAS2275802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b1f1bf79b9677c8f56486f9e2f063d14f189e60d7ee3694837345631d8c559. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZNWQ2220382.
Piano Quintet in D Major: I. "Bloomsbury"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf494a8c7240c512304f13b04cdc55c425f2b31b8b381566e72ba642ec088485c. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/TCAHU2415947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8d5a279dcfec26f8318acc7072940f1d7b12dd63e975fd1696890b7d784892. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM6P42444473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb873d5ed5e6fcafafcc9321c22c8ed334b6605cbb355770333d5e03b38bad8. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZSYP2411874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc7a6717de250ae2c624c52462e7b338d1f4cee894f99b860cc50e6db0251e3. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZQAY2537644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409384c152a6f4455c76e3e7c8f6c537af7c57a4e947ffcb58712671cbff2ae1. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZQAY2533818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb873d5ed5e6fcafafcc9321c22c8ed334b6605cbb355770333d5e03b38bad8. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZSYP2411874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ded6b47f79b4da8026366ccb741ac3f7c24ad21f1d31adc90827a5171ee402b. 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/QZ8R71700200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cc5388a97b53ed956eb7aab6976463510b18cf0ea500307a41912571e537fe. 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/QZ8R71700239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381794f8c6fa4178781ba4b7fd89de636a73e42a43c936b75b80cdf523eb9628. 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/QZ8R71700207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf612d4132f4bc733da53b57f2ff717fde087afb9e731235c82c16851d2c0fbae. 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/QZ8R71700240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cecde016d2fe0161d1e345b66dbe43108d5db996050255b83efc6ccb929582f. 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/QZ8R71700303.
All the Worlds We Built (Deluxe Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cecde016d2fe0161d1e345b66dbe43108d5db996050255b83efc6ccb929582f. 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/QZ8R71700303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8d5a279dcfec26f8318acc7072940f1d7b12dd63e975fd1696890b7d784892. 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/QM6P42444473.