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 0x56a2bb275a03012fdb2fd172e50b0f43eb5ce4b9b8621cf4c148d591d7b62014. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87c04412-2395-410a-8af4-018f4626151e.json and https://artists.proofprofile.net/proofs/artist/87c04412-2395-410a-8af4-018f4626151e.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 0xdb5b92ddb96389a360151922d9fa9d26e1cada9a79d0248e8de1d0510504be6f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM22255167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5d77b1c8a1d37aace8815da75607fdd52bc8f5be2dbf3928c21d3f33208315. 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/TCAHO2329714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613a152a07b08619daf83f733976c8d343483b387559ad71422bb4efaa18433e. 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/TCAHO2329732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb24972049b2cf7b92642a73721d7456aff24020567b86331c1f16006fcd4b8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAHJ2377888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336ff8419459e6bbe832b2cb501de9002364174ac51cad1194a5b1b3776e9eee. 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/TCAHO2329817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145b758b39b2aad9275c4ef289ed75c74bf670e28fe26aed0a51b8c3ed1ad92d. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/TCAHO2329852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f36adc18dee7f387bbc0c3fd2cf9faa64031a83af71d34e31af794aab7f290. 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/TCAHK2314541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efa97321a2b7f639e582fc0117d82df61d4b6e94009c54b8eaa15fdd3d9211d. 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/TCAHO2329904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5f960b88480249f3e85deea6b977a0d3c94b98bddd8d80d117e50a7371d3b3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAHO2329909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8497b68c2b3040c96d1787386205d1d1a0dea6c305cc10f325a5a816fc3dee25. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAHO2329922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63a9e6231cfc7cf787dd58aa1233763fdb40328f738596c6913a9766b582c23. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAHO2357284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc917ff5483b3e3787d8199e39c8f84443685343279badae7bab79f07ffa8d1. 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/CH6542115754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057b26392c6736774d48ffe0c2aa58018792ab0ed6cdfe415e4f510ba5a94bef. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH6542115755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a6a5114de99b96496b19912017bbd0201355c68a8d707910e5f377ec2eb699. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH6542115756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9a41245bda78ddef1c9e772f15c88b75a365b69cf95ae6d9a1b8d5e909a607. 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/CH6542115757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7471311f06cb8818e13d6d637fec8743cee652dedebb17f24224f705581ea3a8. 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/CH6542102355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89cec75d2a3f32a42528ae61840aa4544f69b1392ca9b200b1446ebcdc5c3ae. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CH6542115758.
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