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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab9a97dc531124c3112a8b60f463ed86d0577c4bb554eb40c4369f7a335be1b. 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/7ea97b31-56a4-4da8-8f2e-13ace232bfe6.json and https://artists.proofprofile.net/proofs/artist/7ea97b31-56a4-4da8-8f2e-13ace232bfe6.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214622567fd87b6ba08b2354e8c1f86265fa775f2ed9240f705c59b46e0ddf30. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAGOO2095557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96e925e6784531d5b00ced2837472a33d81148c0b5d919be60f0166ae9738b1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKZGC2303019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ca83e581a746fc48d426a3d8e676caf65ec12f47a201ee8dcf4b791b75e617. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM6P42347776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa428ded631066ae67c6410ab1cbc5a091dcf84e2e3f5cfc14771ea5f4d967fdd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6P42368133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb09884328bc66394b53f545c68ff8426122c4224f01d860b06d25f8072e112. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM7282349354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711b79558b81fbd8beb6140d314148a6a095fe3b73ee9580969ba62195e0add9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM7282348112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeac58f1a6252dad0cb2b4b79db0fd0a7f5faa36c397a0957b976eae83213edd. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QMDA72320671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5053a167963b737805d2cc6d878f963bc70cd89586c52bd530c4bad16fe6ae40. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMDA72320683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fc54210dcd79adb26a27bb2b23bde06a8c35ae64667fc62cd407f48ee2e62a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA72320689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2aa46b36f68a971faf518a6ea1dee0c26431caa22f0c6ffb7ea8919ffe418a. 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/QMDA72320692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55eb8549d1e2d0a9a39b6246f362f23230fdb5c5692e839b3f9ae5dc1f5225a5. 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/QMANG2218392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2652b089aa2e61441b85d8ddfa5d70b235d8ad8b6dc4c54ee0b52f298a5417. 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/US3DF2418977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a972e03c4dc1c09a06da37aef6f98518b68162f3084fa2eea953b641161d08. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZGC2303034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe062a981ac4daaca9a1e87ee5bbfd34ecc12f9497cf6e19d4058c8383ca3fb. 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/US3DF2484086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6612f233bb8b994ec8ecabcce522270f9c2981a4d631d9caa3883d5936933fa5. 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/US3DF2484087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e3a2dbe9cc210b8c1d8bafd06c5012035869e2a6fe17c1cfe2843c2c1264e2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US3DF2484088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb76c10ad4962ae699e63e00a5bc2a52d289823a65e0e7e39293bc730a0cd655. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US3DF2484089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2652b089aa2e61441b85d8ddfa5d70b235d8ad8b6dc4c54ee0b52f298a5417. 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/US3DF2418977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12125c8d254331dc0861dc8e34cf93488ae07d7312a6dce9ffc8a09f352e940. 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/US3DF2472077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a585d9c82ba899acccd69e89db3d627653f56b4e914cddfce63da713e8cfe5. 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/QMANG2239585.
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