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 0xd485ab677ba609c88b9647ab0dcfbf79b5e1285812d04933258c48256f18374e. 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/fee7b6bc-1cb4-4711-98d0-aa730f1a905b.json and https://artists.proofprofile.net/proofs/artist/fee7b6bc-1cb4-4711-98d0-aa730f1a905b.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 0xe244830501fbfee2d5d40deb19e056fc6d55f62168d24294c5a74da5ede8eae8. 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/HKG732429664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17253fb8073258dc5d2a73b36110f87a7d15335335278486a3f31c3c9a3ae3f0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/HKG732429665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff36f7047b94b6b3fe1307a107a0129187d226e36f02557c1e361ec64a85634. 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/HKG732429643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2804c874be6cc79609273f5eb527e807a24a7caac7a26eaeb485a48aaa16b3. 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/HKG732425222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc121441a2621079101b6d248ed2d315f9bc926aee5a0bb9b715822f48f6988a2. 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/HKD012301178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d115fa11e775e6e8e251500afbfd708f28572dd061380f99170eecbe78afd2. 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/HKG732425228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a13364806dc5d0d7f6a65e55cc35e8a8a2895bea370db7a54b9a1447db6a80. 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/HKD012301171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c637bf5e5fed984b504cd418f4ac180f91e2631252fcbfefca80a4c7d69a2e. 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/HKC372479801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6d8e8e4fd7d97f0c22eb8a0a664c378611af435d62f14d0ff8cf0e7d149963. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/HKG732425223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23bf17d4507511eca9702376f54b975f8a4f962b1ccc33ed02243019e0d2f89. 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/HKD012301175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5810c3dd2e34352f4885b30aede032557d6883bcaf6af1937247d4fae83df6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/HKG732425229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9a93b84e95c43c545f3c7a4fa7dac48769f7f6628eb3310b539fa3237dc627. 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/HKG732429648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707fc122d6e0cce3c71d63bd49a0f7fc38507b21f9e86d12fc3760c217502e36. 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/FRX872344431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013a8464d66b74ec931dc0c624ede7f34d5af1e5fd4018e1a219c8d159ce94d8. 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/HKD012310208.
长夜星光 (电视剧《玫瑰的故事》插曲) - 伴奏
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54a3d8d38db50ec2ca801f8620be6da724b372f6966f8dfabd0dd7ef266168b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKD012310207.
长夜星光 (电视剧《玫瑰的故事》插曲) - 和声伴奏
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90198606d02c68d52e5f10742e7c95a7a1b83508b5fc5a04ab6437af1d863326. 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/HKD012310209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89f7e371e44d6709afb76585bb530612dae39ed8bfebe58821725717dccf94a. 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/TWDK52405015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d03cb33302e660de77dc4eb61030df84625579c99ab34f8028db913845cf96. 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/TWDK52405016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38916be7f41bd32ef58faee823fa52be893ed687bfe4ceb2e0eb82539967b167. 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/HKD012355766.