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 0xe198fba1a591fbd3a0a4a8f417b89da828d393c4f83d870d17074d89b33941d8. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5db1c281-222f-43d6-a43c-6052f740e302.json and https://artists.proofprofile.net/proofs/artist/5db1c281-222f-43d6-a43c-6052f740e302.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 0x2650ea9a0c63bfb3aaba181d49987403eecf910f7a29610ab267a54661c5c15b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:01:35Z), 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/FRX618500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbeabf4aeb5e3d6af952abe90b5cba7ab6962e21c0e7d41456d68b3c3a44fa4f. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/FRX618500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45baa23525d6d5855281c0ab5be6f4f75c759a41291dd4fb8690cd85aaff3411. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FRX618500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3791847f7c284a73399f005a9445df02de40fc10c939bfa3de7fad5299a1875. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/FRX618500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2650ea9a0c63bfb3aaba181d49987403eecf910f7a29610ab267a54661c5c15b. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/FRX618500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a9478be9c373a7d33e11278581d16c2dba57a4169627a67f16081b66df6948. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRX618500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed905e74de847c37df329c3b3cd3288eaa576db6fdb2c9fb4d5aa2fc923d532. 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/FRX618500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d86380b6807db9d4685524b0402961f3de1da1ee377eb86337302f284c4b227. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FRX618500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8eae16bf788d07d9edaa357fffe26b920db9c2d1b27537199627faeb479b042. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FRX618500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc97af1c53236f0fdecc082f9ce195ea1f3c6c8cadf7d77efee1dcc4861bcfa8. 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/FRX618500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6a12ae57e336d513ac1748ef55a928dcc254fabdd6a82904037156b4b9c885. 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/FRX618500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab8e4eec5899a6e4d6ed0a94cc73e68c22200cfc24c21e284b15009a7a0f3a9. 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/FRX618500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3179d0d839d45dfd57dd603530627b2ca44652b70c5457a24ce659ca9ffbb7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FRX618500052.