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 0xe0e7ac36631b4ecdaa63743a466bdf25bf1d9f9b5221e84bf10c9aa65abfd447. 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/3b559db5-c4e8-4d6c-a1d0-7b97146b23a6.json and https://artists.proofprofile.net/proofs/artist/3b559db5-c4e8-4d6c-a1d0-7b97146b23a6.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 0x60c56d7b8c9d685757f999967525accdc82a4e587b1574af608424b156f5d659. 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/QZYHM2401292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279f8ff3578a45b08b2f6e65d060dacf79711748ee90e46e60bc87889982bd1f. 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/QZYHM2419563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5923790759c9ba506706c27e0954528c2a753886fd13628f2211d1a8f83225. 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/QZYHM2408829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcc8618fdad915ed95cc3e1136bf04445a557d1953fa985a94d8abc315f1d7a. 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/QZYHM2402751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49474fc263823afd7f2a396d2c02f569e749ec59d03ca351dc6994b18ad6586e. 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/QZYHM2372539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cae7a18bd5b020a0c31d52a88b6be11b7bec0b47de35f11a8b3fdcc7bc2f5a1. 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/QZYHM2370651.
Giờ Không Cưới Thì Nào Cưới (Deep House)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa5ef3cd4649032b030499a9c04f358d3811245c06738d9ceda6ef3caab8979. 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/QZYHM2366071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dc7cd6d2af0d1d8762fbc7727b206b02456e1a716a1fa822a94dabffc8b27d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZYHM2363936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407449a7a01126d8a819298d64c3ffe2c47ecaab94a629993440f57fc0a5362f. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZYHM2359509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59157307d4037a9d2da0589b511a12766d075ce8b03e3145fc3a1a5b65e0d4d. 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/QZYHM2359464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc87831207b6deabeed5c15b208b10efcfae11178fc1c34b90e72d9e00a5637. 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/QZYHM2359428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149c8c895dc8c62ab6557030d9b871c680927107a95f24bc121a1800051670c1. 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/QZYHM2357350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf689de94e0d57453485980a34f15babae534d0f25adc754358927f3924df75b4. 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/QZYHM2357340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed349dcee4e0503d6fe94c2b1d62c30cc0e4cbf52f5419c27acbb665a73f249b. 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/QZYHM2355025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7782ed60be45546b51e8b2f395168587f271ed58c06e27886af14152e72c71b0. 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/QZYHM2336590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb39ad64216ca17245262810cf36047fe6371c19452943372432183575d8668. 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/QZYHM2336634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63af1925d0a472776e91d75300570531f96527cf4f5575a8b553c5c35bc30dbd. 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/QZYHM2303593.
Ai Bình Yên Hơn Ai Đậm Sâu Hơn (Deep House)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727a463b4da6aacaf79a64a0c03bdad670e1515f0ba591b62943c060e0d482a5. 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/QZWBE2352834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdee205a7725c0b3d33870653843f0a0f600dc49a783a0edd4d9a8f99383ff1. 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/QZWBE2349169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243c684d87330b73b099be4e6d196af073affc37d2f581bc1fb641f502b8a42c. 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/HKK972212543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e6611c7ccefa44be23597d24b3fb5d26a6e4d0fd6ed4ffe483b6d8be5b7040. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZWBE2410505.
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