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 0x37ca23fbb9c3a77ab67673777eb8cc09cc997a566fc0d7c2259aedcdad38b8b8. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12e4c4f8-5209-4421-b031-e890d74a3264.json and https://artists.proofprofile.net/proofs/artist/12e4c4f8-5209-4421-b031-e890d74a3264.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 0x50fe4a8e82e7aa1376c0f6b84617db06fe76e6bc78da47dac012637bc13d84f9. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/SEYOK2013701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe870fa6ea74e3aa2875fc23560c536dc4b6d933a95839f094a05dd5bd32fa75c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SEYOK2013702.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a080c9e4f02b7a3eeb5c07eef1e7457f7d39db3c08e4157c48b3e7300a5526b. 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/SEYOK2013703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efd6b9d42a7c412e7db29d6b40baa87d9a09bf6f47f4a3e042291fcd2ff3492. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEYOK2013704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d3a481e507f7ac22ebc8c391192c6e4b46905069dfc6818218e0dee295a5dc. 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/SEYOK2013705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cb6c034b551eb70a35db89fe50caf6221e78070f532aedaaf109f5a50d46c3. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/SEYOK2013706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e81aa5eb1c8f8a9273bbaf96dafdde7a7ae64f183b03eb32c7f5c9d66163e8. 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/SEYOK2013707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf986292c2d5caa8024e4e9f7e27f98098fe0a3b5af8d88d2231248e8c51f1ea. 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/SEYOK2013708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8518d1fa3432d044db08ff2d81ff0b0ba1d4da8655f8de69e93b403db3f0c8f. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/SEYOK2013709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1265f366fb40b1e626f28146b4e1a9f813e28bfd5350e5280953d7a62dd2d62. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEYOK2013710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb017de226625cf617e28ed7972c625e5cec3465ce27db4b2071f488a8dd8b8. 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/SEYOK2013711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b31fff90b62559269389b83ca624083dc2a5863102a33782259f711cd698db4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5X81700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3449311dc504e27a155d0501ecb655f82a07494bc0661e40be248cfa13b233af. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE5X81700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5c02638d375a32d01ea49621e48439cae2fae36bab10bea3ab55a3990a43e8. 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/SE5X81700103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81aab40bf17275ccf9ab579ef4fba5a0c57027966ddd6e36da311face124b512. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE5X81700104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa531b1172f2c3237b84b6da248c2637e8167f95d93ebca9147449f2c7fdc8fc3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5X81700105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7936130f17b1c8cf8c58abbdced3a632af4bf26629094c7665e69f23bb162c9b. 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/SE5X81700106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e8adb1f1e9b6b23704ae71459de9a1f21f55d6a15d02b75ed04c4dabb884d4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5X81700107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985803568444fc40d1a26d33e8cc3f8ad724430578daf4545b2ee9a717a8b10f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE5X81700109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab14c4168299d32e4d0798bc5a0d8aafa3f3104162ae5c1f771f8c6fb878eb9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5X81700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492b527332a4a9580f13ef82f2884b744fac4a1a0fe6dcfc483018489615f486. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SE5X81700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011c3f281b7cfbe75704fffbf24352ec60ba7c881c6c60b8175545b2787a0217. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SE5X81700114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807b2b9cf6497951f13cfbe2f287277d00f6c32a724089895fef90f83acb5ed2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SE5X81700115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c89f59f18496ad2c0e030ace69f51b70a06a79a5ca5e51d453c0bee872943c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SE5X82300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec28e724a5a874af1009907c08e5dfe637da31b7805cf36b450ebdb283d7084a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5X82300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07716537a6638376500ed17fbe42a624b80c0abf804c307484def12badfffc60. 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/SEYOK2323299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b8501ef70e73b709e46efb3db1b5291e13a53e810670a89ff89bf44025a854. 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/SELIA1901025.