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 0xe1a27d9bc58d885930284b153f83c0cf7360229cd25062c4ded2379a0cd0745a. 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/b8833dea-d20e-4c3e-8dbc-e1dba923fc43.json and https://artists.proofprofile.net/proofs/artist/b8833dea-d20e-4c3e-8dbc-e1dba923fc43.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 0x514f39e784a2a2782fed2be57ff8b1c55b4e8851d0b3dd60d3de128cd84562cb. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TWL251000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04a5ce9142e8264a5074a303f7c62daf5448bc3a5131dc21fe910d0c8ce65be. 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/TWL251000410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dbf869e23b3b69664f4c7232a072c0b30cd9dceb6b886dfba7b9cdbd9d1713. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TWL251000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04a5ce9142e8264a5074a303f7c62daf5448bc3a5131dc21fe910d0c8ce65be. 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/TWL251000410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61bc689be648da3ca124882ae2b49ff089c6921a9ba4c9bb5782fc772ff2d1f. 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/TWL251204101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff57c2c44ae21d33264fce32fc8cf8b8a8797ea58abc0e78537eae3c8c0adb8. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TWL251204306.
Where Do We Go: SOUL REMIX Feat. Trout Fresh/呂士軒【SmashRegz/違法】 (Soul Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14731db26d7089bffe5079d958a8390686fd9190eb308e70c16a550c8e207688. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:35:14Z), 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/TWCC31802803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2e9d4093397817d488495244a1ba9e59ffba80bc130eecf99d2c931d11d62e. 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/HKJ962012585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac51e02f68142fc4753de345209a2e7ce6d295e5ce47000ec00134e64fa4350. 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/HKJ962012587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21eb3815b542733d257999fda0ccca189af7b4ef0e7aae614b42b998ee8fbbdf. 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/TWC230515107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c784db9130d4ba1845a628b317e24ce0e1a434ccef0e781dbb915da6d00b6e2. 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/TWC230515102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee0e724886781fddbd7883d3e9a0bbeb5d330ce050d5aa84e3df0075991f93a. 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/CNZ481900067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58150304e47b349dc8ea51a677b4fd08d880754d8c3295acfeb8aa2a10b0d72. 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/HKJ962012548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9aa9e0c7d0785191fea3d485f0d38ba53aecf9a6c946cf82644a16a93b31c8. 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/TWDL72400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d31c4a83b331d99b062486b1cd0c5bd09cb6417ed68ae8e321c7893c45231fe. 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/TWK971201106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f255d2bbfd0672f1417256296533f2dc4d900b3a0f5abf7d6e245295dab405f. 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/TWK971001804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc243dd1b4cbad8ba4fe40715d58aac5a9a0d472001e2fd6e4584ebdc4a8491. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWL251100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ae603da828d4fd1f9d050b97e15d7800a46139a5cd2a36c5bfd50830e0b5ff. 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/TWK970801503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a5f4105c71600d009d37039a1bbeff75deff0a56dec0b915bc4bafe0539ac2. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/TWCC32321941.
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 0xc370b4b69901d402d46a2e7781e5bc3ab9b630004ea09121c08a6cf50a781d04. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TWL251201106.