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 0x76c3ae1cce2012d19ae7bbdc8073c43162db24877d4c5ed6308c5dfef067ca52. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4eaefc4e-9564-4b7c-9569-b476424a0e7c.json and https://artists.proofprofile.net/proofs/artist/4eaefc4e-9564-4b7c-9569-b476424a0e7c.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 0xbbc20e215ad72f04155c14818b4b5a761d828bb1679b1bfa2e1d865fc07bfde5. 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/QZGCD1803646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3599d6c9a098284783b1ca92b07a85b0513e1ebd7d00c1a61ddb3ece63a0d674. 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/QZGCD1803647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ab9030eb9cf39ef0c966a7e8e3cf78ef6d9328e325efdf12be746b95571a03. 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/QZGCD1803649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cb629bf67c5c73018857be5ec0e444f48de142ec54a344a7b255091670f4ab. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZGCD1803650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bfaa165ac17181f3b5885640f592b89eb04674bc8e2f8a049f5fcb98fce670. 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/QZGCD1803651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdb483c89ffdae12d9fb29078daeb30ab81ceac45040bcd4de40ae53c5b9a1a. 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/QZGCD1803652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053e253b77d350b3d8372663784d55f1400ba2a6d303ce5206eecdaef3dc1c02. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGCD1803654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16214e6753fc14af454da0f12d72fc4b254178f78762b80d439f49a1a17f0405. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGCD1803656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a204e2a9b51ae86bfb96684f45aa7a94c6ae70e144db06b90be5886157d965. 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/QZGCD1803657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d60796db9d1e1b3498a2bc2c4d147f8cba7d4552aad4c05df812be1e7c64449. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:38:20Z), 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/QZGCD1803653.
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 0xaa3bb1655d61c7c9f73f67ffaf4fc0d829abb84873aeee55880928fca10b423c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZGCD1803648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeda8d1707f4de3f3202471fdf6daef511410419fc3a58d809da31276440786c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZGCD1803655.
The best of Đan Nguyên và Y Phụng 2 (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1874d3c0fa122d939f05ffa848dca9eafe2f07c1844c7df97928e69154440b. 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/QZGCD1803384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6614721eb211e58289708d67c56fcbcd5d6ba77f531635cfed6799274e75091d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGCD1803460.
Trúc Phương - Ông Hoàng Của Dòng Nhạc Bolero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cf75d0fd7489b72939d76594212f6b79cb417f483a93ed16f6e1d6718591aa. 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/QZGCD1806028.
Bóng nhỏ đường chiều - Tôi trở về thành phố
Saigon Nostalgia - Sài Gòn kỷ niệm (ASIA 68)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2787d63754231beee55c6ede4f113acccea711db06d5d683e909d96ebf852ac. 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/QZGCD1806154.
LK Đan Áo Mùa Xuân - Đón Xuân Này Nhớ Xuân Xưa
Xuân thanh bình, Xuân chinh chiến, Xuân tha hương (ASIA 60)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00cfcb7baa94372c3c87a73355c60d7b3bfc5024945aafd2b83b3382a969d5b. 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/QZGCD1806356.
Liên khúc: Hai mùa mưa, Một mai giã từ vũ khí
Liên Khúc Đêm Buồn Tỉnh Lẻ, Những Đồi Hoa Sim (Asia 283)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0806993c519049b337319a4eb7b2bece5a662097d4b6ef47e91ea522aece3854. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:25:45Z), 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/QZGCD1804004.
Nhật Trường - Trần Thiện Thanh 2 (ASIA 61)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80b1d9ad23492bd0eb42cfbbe90fe537d900f17dfe51518fb7670eb04c0da24. 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/QZGCD1806318.
Mùa hè rực rỡ 2007: Yêu đời yêu người (ASIA 56)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e995cd30449f5cf25e985901542e1213809f0f8e429cbb45576d5daf1145d2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZGCD1806442.