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 0x70459c3ccedefd696e04fe060788da9cbef43062a10addf70a6e5e46b5a39f1f. 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/74d81057-e5c9-4f1d-9cb7-0fed08c880fd.json and https://artists.proofprofile.net/proofs/artist/74d81057-e5c9-4f1d-9cb7-0fed08c880fd.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 0x8f067bbb4a9b0dccd99bf6ec6b16401e0735b51dc0ab87525be634e5418943c1. 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/CNZ632300674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9442eb3a5db97da1f0bd36847580b7eb9cfa98f323c8a25638e1d3ae7015b71c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0H2454848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3db1441c8360ade15deab789eef0e80cbc323e4b7cfafef93297f507ad244ed. 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/DGA072457505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e3c9158882fe23bf75c9e891e6ac436161d3f6118069f473fc74ec2de5c391. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA052449143.
爸妈，有你的快递 (Dad and Mom, you need cry dear！)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6916c13d27e742caa9c032d0c8782f5cbfd1941e70fb291ccaa12dbe49be4e43. 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/FRX872411886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264bae9f542498461879e82c25de4dee54598c37489113ad51d1adcb0afa6fbb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX452425001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfca1c49bcec1eccb349ce4375b9117fe00eb6d78795b569928103a4f583e01. 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/FR96X2428286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1406cd667ccf28d0081fbd1aad1342f56b065b2e42fbf359908ea6706eff190. 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/FR59R2473423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5138373a7888bf5f36f21dee8101808a5b6a1da0fa7c5b8561326517c034bc83. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR10S2428950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab9026681fafb50dc5fa0aefccf5872095f64709ea4d2b019337b066f2095fe. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CNZ632300766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcea0c69a3859ba3e59f2cdfed0c453f33032c2b9853b213a7ed01ba465b68f. 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/DGA0Q2313840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd557faed3870e9cafc81bd4584342f57a2a1908188d95e744fa72b577dfc335. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA0Q2313838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b91f9cce70ba074459206dd0ca8a5e34c75f674cac3bce613b9d637ea9e057. 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/CNZ632300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dace79bbfc8ea8aba41308a2994e57a17caec823a73fdc42b9a32287945a27. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA0P2464711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff22224e70c58328ed3ef1bd303162e539cc314a8ddd4ad1e9463bc31ecc816. 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/HKD012371937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1cdd72866467d3dbc4e2e6aa3480b3523298da5fac6ea3d3e5af8ad4a8c819. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKD012372132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d56d09c42adb0659a708d5f9b93d9d538f0a6ff4aed0054fac439ae5d2558db. 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/HKD012372124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec6958244bbf89fb0d95000f92a2b03809879f405acc4066ba24b6fb1ec9709. 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/HKD012372320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1517c2cd523c7a5222994fd9ada716c2a6badbd0a58c039548cae15e670d286. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKD012372100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51430cfe7d32fe10b461b66e0116c2f94d14f08c7adc5816fe6d6a8b517f89a0. 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/HKD012372135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27550748fac0ef7565983b9e7804538c5b5923b37c46d3ad5e9cd810d7488e2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKD012372286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e73d5c1954795cfcf0561dca7cd80dbbb46e020db1e26ac7bad63c144e7271. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKD012372192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa075ca4859251dba12ef04a76668f4eb005039a4d2d2a2912f26bfcab430a6d9. 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/HKD012372252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58460e873d557e82a8c575f20686018bda375dd349a47f52b40da84313d6e8c. 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/HKD012372069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacd48ec1625d5f489950d22fc68fa3565f9c50d9961250095b39c1a800a6340. 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/FR96X2500234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325aa8562ef5005b4e34be3636a71281eaf63d46623c99d0807f377487e63dd5. 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/FR59R2507289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3716a08e78ac5e90aa5f07057e6e110f96e2953fc47065b6ec4258ce7d3e977f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA0S2409243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab353d96c7efb8c92e7dc11aecbfc90b6eebe255bca9110d186c7c4d20d83d5. 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/FRX202580054.