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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db24bdab88e01e07067ef4a557b807a2371bd05461d9b5ac722127e4807ec21. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85ce0a7c-ab83-4af4-bb30-240f7286ce49.json and https://artists.proofprofile.net/proofs/artist/85ce0a7c-ab83-4af4-bb30-240f7286ce49.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e2f41650f7dfd6f645e00ea821fd9ba02c74dc5543dd65947a78eaee2a5ffa. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ES31E2417014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00db41268f719b161e5f99cd17929cbbf49fb1b2528ed9e579243973abd276f9. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:45:33Z), 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/ES31E2417016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425f8cf59cd97a5db6a0be15f77b3c87629e35c7441196e175cc8e259e21c5bf. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:47:51Z), 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/ES31E2417017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2da405bde3e3cc59dc0534c58d9814141f322c69a423b1760e1a994e8c896e. 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/ES31E2417020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cff7219ae1cbf5339cb67904fc8e002630a2ce9d5d3ad9bfc1fda1653ecc393. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:32:14Z), 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/ES31E2417015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e2f41650f7dfd6f645e00ea821fd9ba02c74dc5543dd65947a78eaee2a5ffa. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:26:02Z), 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/ES31E2417014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaeb90dab2c13a17e59f182496c708ee4c0bcb26698b6c53004c1ae884bc3dcb. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:18:26Z), 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/ES31E2417018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00db41268f719b161e5f99cd17929cbbf49fb1b2528ed9e579243973abd276f9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:29:26Z), 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/ES31E2417016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09b39b26d4f95ad4c2d32f427161108757689b51faca36cae217aabe7621e61. 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/ES31E2417019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b16d0d481e777f6becaab7dac03bd193896c1034e037a4cf5b8d045f29331ec. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:37Z), 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/ES31E2417118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425f8cf59cd97a5db6a0be15f77b3c87629e35c7441196e175cc8e259e21c5bf. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:56:06Z), 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/ES31E2417017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ce517afc09d1c541769471b8709869dee706cc9193aabdba5080fd92e74263. 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/ES31E2417049.