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 0xf850687b09f426afbf042ad3c188df4330cf33b16f0ae254883fe6f1ef57c91e. 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/b948c14d-bf15-4178-8235-c70e5d248479.json and https://artists.proofprofile.net/proofs/artist/b948c14d-bf15-4178-8235-c70e5d248479.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 0x781bf70912057e4ec99099cf98c54a224763ff767651558daa7f04a096f5aee2. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/FR2X41971182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdacd737d8d291a448995203ff1f2a2c458da050f3561f9382ccfe983934f087. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/FR2X41971183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b139372ecfd53775c85d3777bb7b1a229524b6f2f4a38ac89613bbba0d4ffa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR2X41971188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a96479db9e57b65d3af71ca9b5995ccbb9a23aae435bc42c39bb6e24b95eea2. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/FR2X41971190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4a6c6d9889b16aa50317586817f5693b25f46436e40ad95a7e9a837cf66d78. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/IDA941900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d5b1004bf40433d8774df91348fa3bbed707ad8509551d3d8d6b9a670a7ece. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/IDA941900205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a86db5d625986787183219314208a9f481a39fc072486b66e45acfdc040642. 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/IDA941900243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59e20fe782b544a5098f90a466285d85a6b0a6aedd0880c4dcc3a2f147ff1ed. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/IDA941900239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59b5f6f51c64c86072879c2a8a2c8198119f94b24936b8d25e97ec53638afd3. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/IDA941900240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31596f6dc1b00a5cef64e75d99c49166e2bc9f26a3e9c7e28da6dfdb9080a47. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/IDA941900242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04deaaff025021535daa7817e63a57d575868d8219bedd1b58890eb3adea0c59. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/IDA941900245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c59e9ed9f47786327efc61b8823a69eecd35d1ab418fc4fe6d9e67c0ebdf461. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/IDA941900247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ee40b6ad25c7132af59b72c9d556df3960bf17f236abd7e8377317c35cc433. 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/IDA941900248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ae3c35b1a4048b23770f91351ac163c8a6b8e8b356347e516f03b184eb97d6. 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/IDA941900249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d035562beee57ee43de9651e9c25b73aaa54bb6774100b2d0fe595a8a0147ef. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/IDA942380014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd4f42b2bdc82790f7e6d301e46f6583788ee3c394f5f8d0f854d5d2ede7540. 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/IDA942380018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87779d57dea048f19a9d65ddbe872fc4da64181ac0b205849ccc01ca88fa465f. Chain 2 (Bitcoin): anchored in block 957737 (2026-07-12T18:02:09Z), 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/IDA942380020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451285ae086e7ac2fcd1512e0ce98648dd925cdddbf7a35bd29dfe27e40ea354. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/IDA942380021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d76db7621dba5588a0767c635dcc1029ed3ee22c7fb951c92c1eefa63c5a40. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/IDA942380022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848ec5d46e728241a04813e3a90f8d946cdd9e160870b59190619eb4899b2ae2. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/IDA942380023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8857572e33ca5302895420ea6cb30aecc97297665ad147f74efb6019c666d73. 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/IDA942380003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b6f18cb71ed1efcc9b700b3def09e8f548b27bfca681217918863c547be208. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/IDA942380004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1e669b9622705f5fa1ea5e802ba28ac6582085fc0d61506eb9e77831ca0a42. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/IDA942380005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dd53f95deebe0554abb2c81480b898d453429d800e6029df8cc194504c3682. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/IDA942380006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdb2632737dc0edaf20faa3b490340a0392e5464a618b55204cba6733460d32. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/IDA942380007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd23e574affb931011b4cc71c99669dc0698bbf875980589344ab7b425cf5a51. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/IDA942380008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c766df54a44608aaa2de239a71245c1d55058f95dd2c877ae66c470bd080ce. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/IDA942380010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1518179a82fdf69beda01828f8afb5e76c7dd52bbd067bf7000f9f15fb5a33. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/IDA942380011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a26925afe36e12cb887ac9a1d92c3b1b71a8dd2a75f8f892c819338ebf0eb65. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/IDA942380012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096d103d79d55e5552dffd21e627a76cd8a17d0ede63657ec658408e33f2beed. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/IDA942380013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b0031a03eeb18cc21d7c042f44ccf4c95bf11de552405be00c8e235796d984. 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/IDA942400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850acc90d2842b4073fe7a01563e7a6eb8209162c9bee48a972121272cf75390. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/IDA942400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31e5ed3ac078601b647206177a1d9f7e45f713ffa86afee0776c3f8cb3a56c0. 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/IDA942500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a1414afb5b9ea3ed104cbfee0d2a667d1e33ff4fb9f2bcfb723ff93216f2f4. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/IDA942500157.