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 0x40e11639c5389a3fa28c4bb75bf894da24a254ef7d1dec2604a2db8898fd9272. 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/34dc61c4-5e75-4160-9267-5969624fd429.json and https://artists.proofprofile.net/proofs/artist/34dc61c4-5e75-4160-9267-5969624fd429.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 0x1a3cb5f8ed7531eb88bc4ac278b01871502f9227ddb7883dfbc78b98684866b2. 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/TCJPG1715165.
A stone monument of truth （Shinjitsu no Sekihi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3393d48a8ea04f30bcc4ac35c279e177a2f8c1ed169a67d759d79cedbb48abd. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/JPD731000429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5e739a3824d5d598e0b4511cf7433bc7633947d18ad8d8bff6eb52b0542155. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPD731100946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9844d39aa9d79bff0562bd737fd98c33094ae8d317db0f720332a3ca4c698818. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/JPD731101545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a50486855ac079a095b361684c4a3320ec461abfa25b40338f69ec069bd3642. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPD731200964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177025a2f9416a5713cb38d65bd6c3c27bfea7dd8e3352b4a6bb8d839e7adc42. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPD731200965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd952836f28a7510f505a30b3800837b96841cc60073eb474fdaeafe90b3ecd. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:40:06Z), 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/JPD731200967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4519c0e6c2b37bc7eab21faacac260cc49ee5f176b99684334cdae2198dd1c0. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/JPD731201288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4aab5ef8ea641bb1f492a066ef3439ee678a9ad17f87c8989dc30b574ea4de4. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/JPD731201320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f59c3dae1e512095921d3c7328699dbfa410695fae25253c875d582424bb3dc. 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/JPD731201321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5990944375cc5edd8e7d5cf7e805a20ff4e65c9fbaba3b2ae83a095e1f054756. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPD731201322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bac718fe7bbfe1c1c819b1dd6f858a6527d8215d758fd5377157e1dd015f5e2. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/JPD731300587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d3f8884167a461862e608527bd35d7698c7ba98f8c2239ec04f2325911fa0e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPD731501139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306d074721f3ac9858352c945282061ca6219dc66ff4489a600576d3f6bbfa1b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPD731501140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdfddcb043282ce8bb0e3e08282c82984260b469b9d03773d08d278500b2bfd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPB602093231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f2d48986fb2856171bf90a335c44eca4a88090dc864fdb6090aa10ba366737. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/JP92N2402650.