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 0x5eb7b73a410e8002442950ffa603e69cc4b0aa03e145232170b45af8c9d807f1. 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/ec6cf5c9-12d6-4f1c-a5e7-a8f2d91251e3.json and https://artists.proofprofile.net/proofs/artist/ec6cf5c9-12d6-4f1c-a5e7-a8f2d91251e3.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 0xa41ba1b3730ca9f403ee15f7a095f7469e0c77baa959a0774f580bfa7a72dd2b. 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/HKG732280464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d72235f6d48a07fe587f55698ea79455347181ccf1ffa67b69daee61e9135c4. 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/HKG732280465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb81ddc922d9fca9568c4101ec83ca6ab55a0de5784a494711ba3f3d7a620f17. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:54:13Z), 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/HKG732280466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c52b6bab166def1ca8d15f5e4243400292dd7581398bfba98d748e841cc57a. 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/HKG732280467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceaa1057899fe5101dbd69ed984474d22ffde2904329b53f1b55362e8c9e4d5. 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/HKG732280468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181bac288afcd90e204c2ea6c8893a762369985ce2ea57921181958e791f7cea. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:35:32Z), 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/HKG732280470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfc68ab3c938cc96b193f07cae189e11700ad5db4dd678534b9ebaba653d3e3. 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/HKG732280471.
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 0xc8e72d4ef9770207acdbe480d906771d4d08cc3ad8fc35ad74e855a0e312c34e. 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/HKG732283904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100bca4ef916d08291d3c813d19c6e73de5c70cee0eb00d4af1f48582ee66d57. 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/FRX452336729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7224e28ab15f04f825f4f5e00e54a5262199559552340a36a817f4a3c1e96286. 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/FRX452334575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195b0f1baae4a7d49121cff32100af7edd01097f5be7cbe191f08aac821c9ba0. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FRX452334576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26e337f4e4de6cd07642b0b115092e6d5c50bac4d58995132921e2f672e66a3. 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/HKG732140781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1214e879f4bf5b9209e9dfcf6ec527441ae72f18bfe0b6c461bd4a786a60ef. 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/HKG732140782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77716730e68248f2b6b78a2b1812dc6dca7e6b8aa7ccd9b8012e1cce58652fed. 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/HKG732100696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee063fce681922181c6209ecd53162d7dd61c2d8fc885455c61c2d5a158d7766. 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/HKG732030213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f1897587ac16deff8a06b15a4c48d45f35f0f37c9a643325873e8e5c349ae6. 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/HKG732030017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d2002ce0d2bc67e44eb991b9dc4409847de4159a2e87a1e4ad757f901cdda6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732023718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9b81129c63e2849b14b0edf06c2f7328fa4328f7d816a1d1f8ed41fed51510. 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/HKG732019985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27723b64fea23f38599dda286dda1579ed45747b12bf5ad26f6b3b58b410abc9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM81934227.
2014年中国爱乐乐团-交响音乐会(二十三)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa861a6e759b6bd6d47aae17c2564527f0c3a7491b18295019998746627d5b49. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG731846646.