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 0x39b0b12cc032f80d9218a6ae046955a4f6b785bb056e997af56e176dd2952e82. 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/29e15bf8-d2a0-4143-80ce-972bcbba6c96.json and https://artists.proofprofile.net/proofs/artist/29e15bf8-d2a0-4143-80ce-972bcbba6c96.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Soft And Calm Rain, Deep Relaxation Music
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 0xa61906732d9ccbedc7efc9cd969061612979931785d9e6e4aa7d7a46c2447b24. 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/QZAKB2410480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d372d3b9f29e7d9524a93b416e57e61a46d3a0dbce3506d826ed0d6d6b87fd1. 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/QZAKB2377560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd945f6ac4de0004e3b69ae529778664be9590c2e91c10acb43cbb793c8ffd97d. 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/QZAKB2369308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7938dad15d4a666d5c808485423720cede8c97aaad9537d93b557cf0d3ba87. 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/QZAKB2365848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9859f2cd9e43d248f3a83ff28479897733bb6441284aa782e57af2c1497d006. 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/QZAKB2345962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a67d6d01f03a68c5fbb406662d2853d0880bd3f22f2a57b8f07cc56634439f. 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/QZAKB2324041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd03613d97ee20a40f85a1f9d0dfe5daf71df6bfb48a14d2840178b491e57594. 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/QZAKB2324042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed63522a0b3aeab8b42ac686dc7f2e0d86d62b27cb65004b9a51f69e60ff43a. 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/QZAKB2324043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb118e89b1b6f196383e9f877b8b03ab19adcfd92b5b519b75edd561b8a7daeba. 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/QZAKB2173264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4152486624675096949eb3d94650d4de9e9ee2490882750ac06c7ae468c6671. 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/QZAKB2173265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e666833036f905c0eb4c4b3b03db56a29869dc7b8d1d7f892e006f21bd85aa. 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/QZAKB2131558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05de5560471353e6b706ecdee38be19bd38e024fa39d094d250eb8e6af07d5a. 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/QZAKB2125068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94031a79378805cebec276ab35a2a9be81db96e45474d6e20c592493affb321. 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/QZAKB2125069.