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 0xb13289e3218b561f815d717414d31a1a9904fcc0d254fbf9dca7f860286f07d2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4bda25a-e47d-4d52-8d42-441852510330.json and https://artists.proofprofile.net/proofs/artist/d4bda25a-e47d-4d52-8d42-441852510330.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 0xcc19cd7c2a1249b900d63c2507ce65667f6ab9aba0be590cb6ca7fb318fe40df. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USJ3V1116276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf232e89b659c437f85aa704dea1c9ec1fe3583c010deb391abccda5055642edf. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:08:15Z), 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/USJ3V1116280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e52061b375a34a930701772de03a878157973db931673024b3b354e3dc68733. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USJ3V1116309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1622fe31aecd268b36e21e5b4e7b16047b30fba601a1ab0b00c56215f27a5c05. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USJ3V1116393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf466b4cbd078bd5a1331699777b6310deab1cff65890d528d5f5b49e188f9dec. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:51:36Z), 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/USJ3V1116388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d87130d3870a5dc091b7a6ee71879768620fe584f0c50b0441f48698b05628. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USJ3V1116394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e069df2ca3ff83e21e54d4ca6ad7915802d675f7f1fa995b65d30f688421ad. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/VNR011053939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81a45dc0a5e18d335d4a054810cef2d716f44eeefe20b0c371d158857e89130. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/VNR011053918.
Vùng Trời Mộng Ước (Theme Song from "Ngày Xưa Là Mãi Mãi")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f365ff3eb287c2c2b6e5c6b699d3bbafbd8856827ce3def6a4a586889e14cc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/VNR011053160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69263c0fb4e4c7269924ff35d12a5f631d025e3c3dcbcd8600b7315a253834af. 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/VNR011053356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e35c17508a37fa425a0c09d6de3a6ec53fe1a0db207505a2fe0b38d599a1ac. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/VNR011053372.
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 0x6f0472f02b0b13efb3b6a066dfcab85b3b773bda1971623b517fdfa8145fa7a2. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/VNR011053377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ceb9824d0bfbdb78d54e58056c1cd542705a14eef703a8b72c99a96460071b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USJ3V1128400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef9ce8bb37894b2c2631e7c14ba49bc215e089edbafa41152ae26e73a7b7f2e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/VNR011053318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68476754b102cd88db696566d7b6e3c6c7daed30423b8a901fff5e62c4382d4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/VNA0F1772139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dbc9fba6b52fcea9e457ab0f72ced6b5fec539ed51741b4278fccd9d2088eb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/VNA0F1772145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b596f03e0ab56aefc9a3e8626b4fcb93db878c0ce47b25aca11bce60ab2d539. 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/VNA0F1772146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26471818fdc7fa50f7c350d9dae66a73c8e962a2e155d12e2f6dac0e4d005f53. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/VNA0F1772148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6c4fcc144f7958071c014e520e1949974847d95fac67a2308adc29c107456a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/VNR011053357.