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 0xefec3671d530fb4e3fa13a3f13bc03a188ac606d6b11855cfdb1513dbeb6fe5b. 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/33c05f03-b4f0-4650-b435-c3e740912d8c.json and https://artists.proofprofile.net/proofs/artist/33c05f03-b4f0-4650-b435-c3e740912d8c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gone Away With the Memories (Special Edition)
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 0xa1bd9669edbb39cb0434c2cf4d451f5dcf9dfb9241f6f35d069bd3e5ed4c7cef. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/US7VG1334219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19b93d0170c4c8dbdc4c3d604ebdd81244600647c6645c794486db9b06eabde. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US7VG1334224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dad0efe31cb9085ffa6ae82f45d626b6e76a2f7c2e801afc8cb46b9c3059c6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/US7VG1334227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe480bd7a554388672fb1242e0fa3d7c760ebd2a0021bbcd51068d0d06fd6452d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHZ62200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63957f5b7a3074251d7aa3743398fc731f901b367c9bdebdea8fe49cd7d6095. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZW9M2240104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b74c9b8e119c176b9ea2d98a58443fd971bd0d7081f63d7bd967687fad10a22. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZFZ42491570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317005d8eaea58b9e9cb6d632c96f3498175d5232d7504fd29f8b1c7bb89082b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZZ7U2415783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e569a01f61d13dea8f7cbe9344bb7d859e68eee7ae23ccbb6058e288f66675a. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZZ7U2415784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc8a3ef96714a25b492c268d60c83ab8164d473f959e57f05b92eab7df7023f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6F2530528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d05fae2cd0fd9196fe1d69c8010eb2f05b4df7c5c1d8fd250870a3d61f13398. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZK6F2530529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18c115164c55830639589e8b0b5027f106cd9d0330e316641dcacf35e9ed2e4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT3EX2533955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0569160e6e2555ae45ce26c675aa9736da79c2070f7625a6a5dc5b9c53e0c5. 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/QZES81821044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab7737a3c83b4995beeb219238c8fdfebe9a7562613cf102180f84eb6eed37e. 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/US7VG1327649.