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 0xe0bb0d4b9a0a5b736f8796d4289cf08e99860b940f389cbb3622e5d7e4a98c21. 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/561c89f4-e8b2-4b4f-bc45-d2e3180e5f7d.json and https://artists.proofprofile.net/proofs/artist/561c89f4-e8b2-4b4f-bc45-d2e3180e5f7d.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 0xb5dd1673d56ba30ff3289b669b945161b1bb3d6b0fa78362d9b5954cd33c03fd. 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/TCJPU2231765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a14f00de3116e06465786a100f462fc173acbe7c54b61871957d8f7c384250. 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/TCJPX2377901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd83b3db1fc1527355ec0b399e8714eb1b5c9339dc5d88f4167bcdeb2dc96d21. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCJPX2377872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3a280dce8a44f95e9285f54c3d2a5be2fc8938c0ea47d656f5578576102710. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPX2377882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5859d2072b49fa463fc816bab5332d7a1a8bb5a9b0da5d88d0e2526b552c6224. 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/TCJPX2377885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96380988ee10b8975449b5008be95e8bf7b7de62d6984288a773f0543a1589da. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/TCJPX2377881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3a280dce8a44f95e9285f54c3d2a5be2fc8938c0ea47d656f5578576102710. 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/TCJPX2377882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ca98e669f541b7dadb8b1274b85ec81af46aeca14b741a46b7b87cc5331fc6. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/TCJPC2472837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93d2a822742c927d2633002b8459e69b2395468859992c14cdbbfc64a482428. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCJPC2472884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8de5f0ec90572428dc072751a0ed8f3e68a353629ba0cb7c5c8626620cbf9d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCJPC2472899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b22164fb077cbdd5f939db4f4cba969d840a70d0cb78ab8201a9448b0e6596. 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/TCJPC2472902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e303498e75975c4c55e4639add3876d9698e9a5e8b037d1f5a81ad0ed94e69. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/TCJPC2472926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b9058f7f7da483267a3f80e6994ef193d1ac6616ed6ab5667f728d9843e05b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPC2472935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16eb9b16d3916c08692a10575e93623e182761bd45c0841d30de732765afd7ac. 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/TCJPC2472950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b2af9b34bbf092b628bdb0eedbdebed2a46078fe66c41d11096c5407e10416. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/TCJPC2472897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8de5f0ec90572428dc072751a0ed8f3e68a353629ba0cb7c5c8626620cbf9d. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCJPC2472899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e303498e75975c4c55e4639add3876d9698e9a5e8b037d1f5a81ad0ed94e69. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/TCJPC2472926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b9058f7f7da483267a3f80e6994ef193d1ac6616ed6ab5667f728d9843e05b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCJPC2472935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce013a0f4580a1bc834c25df5d5281af8864e0c1cb82b7df2a71f0f814e8985f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCJPB2474441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce013a0f4580a1bc834c25df5d5281af8864e0c1cb82b7df2a71f0f814e8985f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCJPB2474441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268e581b2967d1b25edecd32b66e6d0bd8d24302c02fe3e91706331092b98d7a. 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/TCJPB2476027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef242ce4fb80e577501d229996fb221f425debcc473fb00990231dd71e23bde9. 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/TCJPB2476030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268e581b2967d1b25edecd32b66e6d0bd8d24302c02fe3e91706331092b98d7a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCJPB2476027.
この真っ白な夢の中でくらい忘れさせて。
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4349fbf9c601f1fd8d9527c587426c2d6d85565a100b108a8eebda43aafc659. 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/TCJPL2513110.