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 0xd915febbf83b3e7b96289f1a48db6df83c46a8dd705bd01cd7fe9c7072dae5ea. 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/8254e1c9-4029-4993-acc9-d49c8fd96cb1.json and https://artists.proofprofile.net/proofs/artist/8254e1c9-4029-4993-acc9-d49c8fd96cb1.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 0x60222d9a10412f82734cd2368ca004dde912def84cd35a0a97261056e1642e61. 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/TCABS1378542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da8c9a95f7c85b44d869cd739cc3289720bc09f5a082497a7ea9ff1aa0f7925. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TCACC1462134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8894bcc00938d615ea433c5824e648c3af55da85c7b7d1528eec80fba4c507e6. 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/GBKPL1780482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5619af4085903fc8b3567c7dc4c465be499418d3195589c2c47c2315236c8114. 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/GBKPL1780483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d862f70bad622d8b3b232c55bfbee6b2af9e6ca8476d7d6f33598ffb10832c. 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/GBKPL1780484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced23a5914cccc471a99401f2e521603ffaaa7fee966e6197ca9a6a55bc49ec7. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GBKPL1780485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841c6b13624d520cfaf5f313cebdd3f7845d67edc8114c6bfe4ba3f3315ffb95. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBKPL1780481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811af2d2eb48166939bb55646a0dd6c666034f1afca2dff3e6f85e6133dcffe8. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/GBKPL1779776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5619af4085903fc8b3567c7dc4c465be499418d3195589c2c47c2315236c8114. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBKPL1780483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f03af042e0ea48bf715d9168f05b8609c19ff8d8f2aa25b56c7de652e832a7f. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/USLZJ1883398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3bb4e419f613a51d32dee74bab8e706963c3ba9a9d99b22de1223dadf134bb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USLZJ1883400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5e0a97cbf3962b7152b225578f07a930ef2d5f47e944d6972374cd70fcc00d. 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/USLZJ1883402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc601a06a84cebdc121ca42ff1e1fe787740a125bfba72b5b1d0dfd4965136ca8. 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/ITFRN1800087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb594d9880301e524100e9a5b461cd5b5cc2cba320e9d503cc84f0fc183428acc. 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/USL4Q1966938.
Good Spell (Max Berry Audio Accompaniment)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e58f33d3bc226b7acfbd15fe8400daa1f69398d1e07f4d0c5dbe2a3d39de43. 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/ITFRN1800197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a987f7e7786b99fb648b3be49b550b37a4f15a2c01df2761bf62a756c26cf2e. 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/ITFRN1800199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025c32dbacc28ed89b0a2455080253b00e600097e077f47645d6857e8eb6314f. 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/ITFRN1800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef58d3204ea0cffd482b307400c84f6f38faf9816f599a6899bf8e071952721c. 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/ITFRN1800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06503eea22a2616c6e670dbc7f8b5c2ad8518e042ba5cc1b673d2c37390adcd0. 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/QZMEQ2354468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fa1e9597fc6a92aa85f04dcb992db260f9029d62a834f332ab211cde0fcaea. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/BEN582300451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028ae83ea6b619dd633c157ed147ecf5b0647208ff402e07ee8add2a3f6aeb38. 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/QM6XS2410703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fa1e9597fc6a92aa85f04dcb992db260f9029d62a834f332ab211cde0fcaea. 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/BEN582300451.
Just Like Heaven - A Tribute To The Cure
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44852eea73e053f8ee102cde59e3379410e5ef3b2c57b44f77bcdf81e0ef5787. 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/QM6XS2202755.
All I Ever Wanted - A Tribute to Depeche Mode
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69687dacb9f01f53744028b494c0836cb953017d88951ee10cfab222ad4f7401. 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/QM6XS2201380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a95184d4fd48ddca20b2294797596af36134b8df06b36268a774714e8bca9b. 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/USHM21944943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028ae83ea6b619dd633c157ed147ecf5b0647208ff402e07ee8add2a3f6aeb38. 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/QM6XS2410703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206064cea57c41ca64348dcc21274c53850df9d7891099a4295d866a347ff7d5. 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/QMCE72423101.