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 0x24a96f23985b648bb0f43c19e6cf5dfe535d0ea5c3cb8304ef0bcb9ec4fb8628. 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/470e62b7-d55b-4f0e-9455-802f02e5b7c4.json and https://artists.proofprofile.net/proofs/artist/470e62b7-d55b-4f0e-9455-802f02e5b7c4.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 0xc3f90ca5f92e07c81e3eb3490d3ee43969ef9dbfde65b5841653263fc1c85bcd. 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/DGA0M2342082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26202c99910490196801619b3ba9a609920fb172278ce840585afeb8954a346. 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/DGA0M2342083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f380b000dbd0ff6655682cd8e8f6617ff2857f002a76ee9f573812ecfb9e35. 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/DGA0M2342084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2669402de220cb30cfe01f455cd2f24bc4c81fc9ea142bcaa9fab80e37ff066d. 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/DGA0M2342085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f5710ffc6e943bdc15720039f52ae7c29f8c87a9cf1744e838fe80d6cf4680. 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/DGA0M2342086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf77dc55b15d0cf8ed81526f44aea48e392cf9725b1983fe72adf6b59a9b13a. 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/DGA0M2342087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4eff8d2b1a49b958bdd88450b639c9304fbf90ea890b5ea7d261a8415400443. 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/DGA0M2342088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff06318ff1383b3290381969b60656be87e19d5d1d2c3c6005eb9fb002c9f79e. 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/DGA0M2342089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7c1db93845bdc9fe6bf7ad5a2475790256b89e0e4bfe6d009df968fd813351. 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/DGA082356246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d6b2355d32d6641105205d51ffd30525216cb46c26a1f2ae5f74966fd69927. 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/DGA082356160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e556bb4ecbb133edaed46d42758108a08bfa4f685bd04f742daf4ad89fa481. 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/DGA082356161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b6fa96a6a4f4db5b79fd56ff9fe10282307db308ed287841d39d75b968dfcd. 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/DGA082356162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada27bbd5d9748bd3a9120adb8769c14e0f275aca93b12e119d36524c0ab22b4. 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/DGA082356163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbaa633b2f53d0a6735d06522422812c67d4fcbcfd711c5bd5783f07941c5c6f. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/DGA082356164.