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 0xe18b4350403b8cd84f81332ed09fd3a1c29f6dd7f904d33447638c0273538931. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9abdf4a8-6b1a-4d2b-afcf-3f1f03ea83ef.json and https://artists.proofprofile.net/proofs/artist/9abdf4a8-6b1a-4d2b-afcf-3f1f03ea83ef.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 0x06f3b963e830cecf5303078bc39f06d538316721cb32cff18149f047408053b0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKC631104112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470c826cd5dcfd4b627a781ffcc45fc19c71e45b0596b9247e221e56c7e29128. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKC631104115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba5623c0789e9759d3f6f3fb3149efebe414e80745c3e42e5fa6569e32713e9. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/HKC631104135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ce83b410103e3cdd5c4c11a4a852c2ddca962a6c3a164baca82b7706b39fd0. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/HKC631204851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0f6b03ef7d6bbc34adadb56def3e66968759dce3b3e8c77421c8f074cb4c9c. 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/HKC631204838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddef2a8c052249343191f4756e2df1f2880a464410fdacd433f41c0b0299518. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/HKC631204859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5372a84a11392976a48d3a6c1b058a3df857419d03a60d5923cf770e3fdd0c3a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/HKC631405970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbd4f8c94e84d9609df7803f9ebc964f3bf3e0e8055dbd0581911f50253f0b9. 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/HKC631707013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd8967cf25f05bd145e6fadb067e5eb3a0c7a98ea3c179eb3ea4fcdd87d7504. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/HKC631707027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393ea1dbc49243234cb4b1bde23e0792b39ea83f899657e34a166285cf688b04. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/HKC631707030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08fa6f60e63b1c1c4727a74660de5edb9a64d10c02042c9e7a2f8f4fb919434. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/HKC631707032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc80d5f330f3fb14d872495d9f8403309fdcacef551c5217f38d5a3e4755c8f. 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/HKC631707037.
姚敏100年經典 - 莫旭秋為你歌唱演唱會
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04db8e2eb98917cbc738652fa3d3eee8ff4b7cb467679fd5f2f3f07d9f6ebe92. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/HKC631907516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929bfa160668fa6062039eb2dcdd87eccec5844694bc1175007e8fd3bd3e31d0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HKS632093899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09aadbf59dbe9105ab1953ab6b47c03e9681ade1b9a971f0058ad462672444ae. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/HKS632093907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d5733457ef3abd66af786d2585d9dbd1e8eed1fb4724e926c18ed43031814f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/HKS632093908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68115c3856df6b8094f23b927b67cd14f4a7107dbf60a7c7fa28ff715316e37a. 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/HKS632093909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d43245ea69505eeb5566146dc8ede4ab0df93172e21d65285b00467444170d. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/HKS632093915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e8faa921c920155133406d9a5cbb9ce9d3ed278a245140deb426bb84f0c4ce. 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/HKS632093917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ba594a6233245b9a821b72dbcaa6c645b9ff902b7a67a697963b0a8ef085ec. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/HKC631807195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b523526911d051575fc755d473d82d28aa887423372971c018a29e5233eff9. 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/HKC631606857.