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 0x8ed717a1f89bf5a5678ffba784f7199653549967c849d02ffb0a259691020a9f. 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/23af313b-27aa-4939-90f1-c69bc3195e72.json and https://artists.proofprofile.net/proofs/artist/23af313b-27aa-4939-90f1-c69bc3195e72.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 0xb827281806c0b00be14f9e796eef6622b1a3cf8292a8d82ee99057095067fad6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZL5N2329200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874dd7aa3c403db41ffbb6db36096019905441851ea5efd7f111e1c62703b12b. 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/QZL5N2333882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33841309f7803be23d529d90f9e57da6d3fd7fa38ad2c345c3a06633b04e73d5. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZL5N2437552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cf415a121609567fcceb27a32b00aa1d93b52cf7d30daa34a36a5109a37be8. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZL5N2437554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abf51aad15929242eb472ce69c639634329cb3a4d786588c0a9649b7422024c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZL5N2437560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f9694419ce2821827dd4e398b9fe9975344d191d98d58604722842d098fda7. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZL5N2439521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c346994e77cec25cc294f0ca21d262f36b98f7fee158c234db9b3f89e147fa1. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/RUAGT2462876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d31befc325572992ffa8134c1342263b5972206932c728cb4cf9119c50c6b2. 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/RUAGT2462877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75d2dfd498653ebaee4923ce70cb757c984cce72f48ae24326a2b970605d3ec. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/RUAGT2485657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa827ffd189dcd9eba2d4caaa292466c3a611beb5aa59cab49837c5533d3f4c03. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/RUA1D2525689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf528bca0815368f95a7f21d9e271f14a3745de1b8985e9f986265875871c58a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/RUA1D2525690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3e0c5907dccd5c7c86b54711e286a140f1dc4734e592eceed0fffae46e0bd6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/RUA1D2525693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb04ad0d0212ee9ecc9e0229d84251848bee7dfa30a8e0c4317e6bdac32ec4c. 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/RUA1D2525694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaffa03abb4fab024be08d3f147aaf67ec30188cf6bfd189c5dc7a7f6ce4809f. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/RUA1D2525695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6fb0bf7bfac7c9795d0716aec729de92ded4e66a6e8c69a12bbae1a03d6c5f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/RUA1D2525696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27a091d2289c4af22eae262be4900a5f5e6482175dd3e808ca1b995abbe13f0. 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/RUA1D2525697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fae33f691125c8d16bca68f4e98a26d606ddb837f982c0a943d9c226b882d7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/RUA1D2525698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a505330b9e76a2d4e078039c4292da92b7fa386c6c59d50738112dfaa782e8d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/RUAGT2508622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d13c9bdf9d3ce3bd1d6fa104f11ad4a45f7b5dc7652db73f52f40fb13386678. 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/RUAGT2508623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5d4539d6d87f4f077fcf060a54a10c238a0289410cff341e935fadb0c50f79. 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/RUAGT2560405.