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 0xcbe0f9d7d5030907bdf37c080f9e4612ad0fa0249d795d798dada134885f0e8f. 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/815f5bc6-5775-405f-adc4-684c19e91308.json and https://artists.proofprofile.net/proofs/artist/815f5bc6-5775-405f-adc4-684c19e91308.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 0xd599d8339e132c98c8f7de3a3f3fbd8bf23d6fcde96580efffcbaf61e7c72f3e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHZ42183413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03d7c82e98b37fa86503d6deafcab9e4fe08c5e1a8cdd20d46bed6864d13976. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJV2010133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a293ac376dacb945566441f76755b582f0933fd0996dc898df744a946d30e27. 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/QZNJV2010131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0362a241065e81cf69fb140d7af4c6996c2cfe97cbec128a84f6a1827af01a4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJV2010129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466ae2dd93bf4a5cae6315f4542bfd1fd42680433269e940d52ff17367e45b5d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNJV2010136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc657ae5ccb12a15f0eb4a3967d0ab8ca64abc9d2c281ef98a9cfb9d5f68f9ee6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA52088635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda36ffdc89c0a0ef4fe8f80487114d2ef7a53823589c48a5b536a5e0c8ad4b42. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJV2010124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387ce9e3867111144a86b6f5ebf7caa30cf9645eca6ff26519da3b92ed60ff96. 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/QZNJV2010125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4643793a3ed79e3ad0610c05ad91423a4d0d5bf538f71fdea90cc236c00abb15. 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/QZNJV2010126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78800dc26436385bf1a1e4301bd86e38615701f520cf548e862c607734a3cd36. 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/QZNJV2010127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ceb36c8fde34b25657185a4950e0730f366104a1cedf9f44e1241f33a109a47. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJV2010128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0362a241065e81cf69fb140d7af4c6996c2cfe97cbec128a84f6a1827af01a4. 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/QZNJV2010129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b849aa858b287ff699e8133c2a164c156608ed9a3d517ebeb83ccace769998c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJV2010130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a293ac376dacb945566441f76755b582f0933fd0996dc898df744a946d30e27. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJV2010131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcad47578540b807dfe42501788d57b98a3f6e39d67e85ebc70bbc3467f2a6a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJV2010132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03d7c82e98b37fa86503d6deafcab9e4fe08c5e1a8cdd20d46bed6864d13976. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJV2010133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf3e304dcc524a66b8ff5d6197205d5babd560f006457a0e3261d52c5325aa6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJV2010134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72835af43bc82b03997fc5801a0ed04a73858193205b2172321860f64fc27ca7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJV2010135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466ae2dd93bf4a5cae6315f4542bfd1fd42680433269e940d52ff17367e45b5d. 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/QZNJV2010136.