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 0xfc558e3e05fa3fefc81c3258c95a6dd754752ce3e0152051bced3a422f44548a. 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/793006df-e65e-42f3-9c88-87e87880882a.json and https://artists.proofprofile.net/proofs/artist/793006df-e65e-42f3-9c88-87e87880882a.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 0xc8f8a11a6dd48681525f51fb369b972e2e2611c8b41c413d3d01c71b0bbb7c1a. 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/QZDA72078388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae3bf26af4aa0706189dc95edcd7e9caefd1d79a349d1486976fb2972e91e55. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZK6M2045139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014ba9d98e95a60a5f77c3c30f7cfb011c23098a1e415a3d35bd70e2b7f77ccc. 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/QZFZ22039320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c34c59f48054705f0d4d4815c6f48ae0b6175d422e0f053398e3759fe4d54e. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZK6M2045140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c0763c656b70e3da5577fcbc989d792051a631a3752af7f8af7d70babc23c2. 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/QZK6M2045141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c29c2a15129fc78e1f09ed6aa5edf1fa105df4c2d0c992d0fbebfa2592c1a1a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZFZ72076075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02a721c1a7b134f9e4fa80dcc64ed4094ae4cafa1cd6f80a7b013b52a023ff4. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZHN52173977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609c802ee40e0d6ff3a47a13215b137522bb4427562a2d8a33bb189c49811e62. 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/QZHN92159832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b8ceedefca46d98c48eeb06e2bfba0dfd7cbfff63ce4595001b2cef0ccefcd. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZNWT2090430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87317d428e841ac9b10967a4bfbb788773a412f6783ab0c9d981bc798ca526c1. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZK6L2161897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92aa446fa5d60e6231a98c9ee028547df5b7f12c37f0cbcef1b85bd4172d913c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZMEN2137844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fc9297053ef48856ec347d70ba0476643c659590b8560103be58fe59a8b815. 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/QZMEN2137845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9014aaf6233dab3f3d99077d2a848314b3eb6bcb491a3517c4bac50d1eda5041. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWR2174335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171c9d4cb8a7dcc6640d776a3dc95102afea485b3e87a6d84378ad855691ead1. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHNA2210634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b3f3daeec056835cb99250f15181c2fe683e63df1bfca149814287d6539f24. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZNWR2208503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb0b0e89e47c0e06ca3c3ca61957565eb195540042e8639ffe8eb45ead9cd9b. 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/QZNWR2208507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e96e2e96d2b2fcdbb988f5dee9eb54b9a1a7c278b7ef652b5a35966a80e66a. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZES82259281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775765236735116dbaeae70345062077de1e8de0fd085f48dc691448d70b2fe4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWR2208510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bd1111039f1bdcbeb97097ad30a937a9bf71228797a9ac3832861e69250d9a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA72196038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7accde7f6bdd81a87ea9c9cd06d8f4ae469b8af6d6a2bafe9cc927f22c982d95. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZPLR2339363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6deb0bfe938ef02da764f667cf6103d69a38aff9dce8976387b5eba8b1b80ecc. 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/QZVEM1852421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34b8f509cd3914587a30e81e6126790d886f1f666753e3953c1e29066b553d7. 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/QZVEM1852423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2313b3fcf277771934f32d397d0ebeace7eda751c63793b55985d8e845cf80. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZVEM1852424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01433ff8c23401c089d8cf8a5f1e2b9f73afa328624fa8b078da0c78b47d239f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZVEM1852425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90358cc01af63a0270edc69b0cfb7d67ff8dd01289aa50eaea1f1beda9340d19. 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/QZVEM1852426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2a25073b7e8da3519cd1d7635beeabd0cf67d5aa0517bd403a2e16ccf3a244. 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/QZVEM1852427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05da0e2893ed57a34667cf27cffc6c1d30c0aec532f92f41ba755972e841853b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZVEM1852428.