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 0x3031be8752aea06e954844bc16b96cd1acd40afb308398247fb4d3acbb34be58. 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/e16e77f5-8358-47f6-b5fe-539e808d49fd.json and https://artists.proofprofile.net/proofs/artist/e16e77f5-8358-47f6-b5fe-539e808d49fd.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 0x827f540ac1b59bb19a698501552476c69d74d0232b441a0bc2854a911ac2a563. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GB3SR1000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59507dbb858fc9dfceac870cb2de0a2564d97618bc592928778d22cf0527e094. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/GBQGW1400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59507dbb858fc9dfceac870cb2de0a2564d97618bc592928778d22cf0527e094. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBQGW1400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6e5c9cd5e0e4b4853aad8aa95062e110c7a3653420a4c92a4d216eb65c932f. 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/GBZPZ1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e64fb74d3d76ce81230314aaaf3cb8afebeb175871a1b1c4b91d6ed1b1cff3. 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/GBSZM1500308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1314fc270239b1d4e1182c252839a201d541a6f39eefaadf9b5c0165db017321. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GBSZM1600452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1314fc270239b1d4e1182c252839a201d541a6f39eefaadf9b5c0165db017321. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBSZM1600452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5d9a114cf320db8a577ea3567366bd7df239154f3fce96fc2b57b635f303cc. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/GBSZM1800518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef9eec8dd48361c6f66ad66dd7a0524b7242cb85667c354d5767394e583c5e9. 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/GBSZM1800520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00085938e0c8584812794db52a3a8b5e50ff2217f601f568a7c16fd821788152. 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/GBSZM1800523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9cabe9decbad55e15e39bf260311f74155611b7326db55487cff4d26814a28. 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/GBSZM1800526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72295322f2048f560957d0706aad0650687c84b7bade62079c0b5afbd3ce678a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBKQU2311967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba4ad376f66999fdab48ee6900cfe108b36741cbc157a369fb30a8c24481696. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NZSU11400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826be94ac983255ecd9c106793854b0bb1455a8e74aa82858df8b20bf9b9dc8b. 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/GB4HG1900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09044ee57df92c24b611ae80cb4d738c79464e34bb37e4d8a9e74bd0d4537420. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBKQU2307475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fbe8f291817f0251a01f9543398b8522fcaaaa28fb5730028437e929db739d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBBHF1310302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb809df2b9825ba60355c4605055df820c6d6ed1134b15ef7db81b62ac62c0413. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GB3SR1000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7d59ad2f6fdb5605716203e7b92f41fadfa98aab412e1c4730674a0849687a. 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/UKEWB1600219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bc485864cfae44f755083d90a76238fe74393479b088985e9ca2b7064ca933. 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/GB2LD2210434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa426d98244e7fb33502fe4663662c5b7b019951f4ff056d7f82defdd1cfd31. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBSZM1300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3567e3730455c94ca052c74bae06460252978b16421f5da6827370f9ae886352. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBA2A1410043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c161640d01b050760ccfe360bab3ac77be96a89322fd2da7fb942f1ed4d9704. 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/GBSZM1100219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6ee5c535be23673d6b1dbc2e407465ed23e2212f7d66693e60aa17fd45c4e9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBSZM1100220.