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 0x2f436f66887a99273f6664b44327216b2518a10281d3eadd91f3fc945f7e2174. 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/651ba068-0727-42ae-b90c-8e0d84aa01ea.json and https://artists.proofprofile.net/proofs/artist/651ba068-0727-42ae-b90c-8e0d84aa01ea.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 0xfd2c4bcfd833f8dbd239872b1b3ccf37b9c27a342753409e49e6335a8373aea1. 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/QZWFW2461489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9538df99f18a94260e215dab718e3ef324dcf0a51a1342f6f2ed78f950c0786d. 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/QZWFW2461491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ee2c231a79df4fbf4cd13e5a9dcf288b788bf3bd1bc5b70554cd5eb3508cde. 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/QZK6P2452211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f35d3c9a290770221876b6f03059cd0a32aec483e899491becff2a5be4937ec. 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/QZWFG2448919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3acf6ba99adb11f4a0c8265b497276a58bdfcf3911ec8339a120ed2e76d995. 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/QZWFW2461493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba326337611a5a83c890e6abfed3757ec1f2b8cbdae9fa42d0c77f29c6aad58f. 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/QZNWR2409142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365098780427c22f1f719c17851d0858eabcded5230b37ba5d0fe9e8b10dced6. 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/QZWFW2461494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ec3fb7e302f18546ced4d60f5f1789535d1c119f2d31d3727bbcdd5a4bb508. 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/QZWFW2461495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e3d639fe364c65411855a877106fef497232de850b0ed8b90b5bb6c87d5719. 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/QZWFW2461496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971a84109edb04f41c4af8e48c9168a1e06507e3f3e93accc5fd3c903a796bae. 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/QZWFW2461497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e697270b3300115604560d74387d3ccc57c6f3932ca88f26e09671bc3aaadf3. 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/QZWFW2461498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ee2c231a79df4fbf4cd13e5a9dcf288b788bf3bd1bc5b70554cd5eb3508cde. 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/QZK6P2452211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba326337611a5a83c890e6abfed3757ec1f2b8cbdae9fa42d0c77f29c6aad58f. 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/QZNWR2409142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f249fdccfe25b5ec9af6e5697eda7e0fe430d5593c3d40f4c8af4f8caa149d. 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/QZES72217111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c30e108a33b90707d30e80d74878f6fddbdd938bbf0a04709c4accdece5f0f7. 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/QZES72216947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca95760890d523482d7199ce23f01c864aef79c8d9481f4c41ad01bbd22baff7. 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/QZES72217112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d63bc2db6589dabc143bd4fda7a08377b887813df4a51606e46f8a94567c19. 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/QZES72217113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ae899b58aaaa13c864aa5427a912591900d737957d2c5a1b4f23ebe5b82347. 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/QZMEN2179809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf616057deed5a8b76d5497076c66fa68e4c8f62839b4bb2c48b7ec9b9660fd. 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/QZMEN2179810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b85a5a01eaf36c06993de4678a9eebe1b2bef872a0d648271643332a097237. 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/QZMEN2179811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72345963d5a392400d819816061d3ef99ff36efa50e6e51313a24d5cb555db64. 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/QZMEN2179812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4bb3fe9c48ee3168bdc81a603088fc649a3071743dcb47032b4a3589ce9c1a. 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/QZMEN2179813.