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 0x13ddfc572e0e43d2a71abc3f0942a029a8d81e320a50e87aee69fdd0ee6073ee. 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/452f15f8-4836-4d96-8cc6-5da5cbec467c.json and https://artists.proofprofile.net/proofs/artist/452f15f8-4836-4d96-8cc6-5da5cbec467c.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 0x0811a97d7e6ac4d20dff093982fee4379f6c8f804e071ab7b7ac3d899b5c341d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIG2414084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b52037a9e254dc722b586d14d396402ad61ef47d93735058fe9b6d73d84611e. 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/TCAIG2414088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdb5bcc99a88e4ad864c447d992ec1744b8a9d8a986df9e8f7b1a9177c87bd7. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCAIG2414096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cb8ed2549cf28942e48144f99d01d566533cde6607dca1c6fa9298967a4559. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCAIG2414098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f476c18ed3e81e55d89df9aa421de0617d39a8487151cebec91f925fc745617. 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/TCAIG2414102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f3985583fcadbff975fc80db357743454cc906c2411b296940318105fca382. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAIH2414105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17f200d8baed58a995bbbafc03cb1658ab1be39b37446445834d74ac4a51d61. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIH2414107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4407d4375472e00cbca2c8d2f7146e7a6cf4cbfbc27a0ac2263001fbd250f521. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAIH2414116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbd7ac3ec8f30054aa9a6fea632a9b403c90548c957b9ebef88c20c16818788. 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/TCAIJ2488691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924e154e44ae153e161778ab4f863166b1e56ff261894ad4c9f0934feb11c457. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAII2488697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71553cd48a6d7531a75a73f4129197cd6ca9cc26746a006210fea3926e9f3189. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TCAII2488710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73119ee405adb47a8fa1fe578a26cb67c9b87abbbb694968843f37756b5e70a5. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAII2488713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae825a84a31c0a484e14959dfaa193ac7d939af769317d366660ac9b39809c9f. 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/TCAII2488715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecebd149ddf9b9ca3d8bd97928a1699a1015ebf735d9816167e7f1da5637ad1e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAII2488642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5132cfcd61822f2922828f3516c6d939f6e1b6f34ddb844d744d397e6afee60. 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/TCAII2488646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f6d171f31e2a8b573686fafaa2c9e5dfe73c6f7a770fe45846755b8de3ea6c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAIJ2488647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcabc77828ff10a0db21c8f2622556a17f88ed4f57898779c456601c6a5fc31. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/TCAII2488658.