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 0xa23534de735ca7bcf42713afc23359c1eb0f551d31f3ba279536dfd761bce84b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/477515bd-f3f9-4eef-a78b-94bf61d97f7c.json and https://artists.proofprofile.net/proofs/artist/477515bd-f3f9-4eef-a78b-94bf61d97f7c.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 0x7532f85b997848eca62bb544be20306ab40bf079cad34f1e9fa2c29188385b2e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/VNA0M1900126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4740bfd10cc37b3d98d03011d52a042294252704217ad866494beced5f4c54a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/VNA0M1900155.
Nguyện Làm Đóa Sen Bên Cạnh Bồ Tát Vol. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d746733874743c57cd10d09c70435e069020533b362345c86920f6cb3b32499. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QMDA62294877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12ef987706f66f804a50f628f58bf9f61659935beea4bf27319b0c4d7c89d7b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMDA62294894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd864f3c13e7afbded0879501019666391baee7507ce4770f1d9da2049a85308. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QMDA62294880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea37fab59b6a9286d7e2c28a0e5fe10dcfffc7358bd7b637146507d13387342d. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QMDA62294881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01acc134776f672e6967f1145215f72e7c67285eddb67190a2c40f0a083e2757. 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/QMDA62294882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f748ef4fcc44f7b8528ec535fb46338dbdcefc890c99e390ffd4448ea214426. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QMDA62294889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a30dbee1c60d370ea92e2f7ca3320f72d1b8387b98696defb6810cb09e77b6. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QMDA62294910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab39ff352168857c51ddec5a12a7a3acbe57af1991b64c0da16e8756b93877d0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMDA62294912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dff225545a9059adb7bfc0024022cf48ca81005f898f474f21a1fe8e9347388. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QMDA62294914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b39171d028fb79fbdbc96938a0a27ac223e865440d527a96b72cdf952868400. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QM4TW2385123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251372f747701d5c4df7f3f6a357da32cf57f618022edc9bf6af4c9a782126a9. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QM6P42353522.
Việt Nam Phật Giáo Sáng Ngời Hào Quang, Vol. 21