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 0x4009c13119f66bf6be68a1033d8e30302ea3a45d64988756bf461d54e5df85c9. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c45337cc-3962-4358-ac5f-2be00b3495bf.json and https://artists.proofprofile.net/proofs/artist/c45337cc-3962-4358-ac5f-2be00b3495bf.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 0x8cfc0bbce0170ee21c3ee4da4dfe6e78b4927e4e8c9ac04c2951487451c5c69c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:57Z), 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/GBLLT2502491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7fc1f10a0bc8c415cee31cfc8e4170eb46632da6216c4f316413847ab9145f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:02:53Z), 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/GBLLT2502493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03510a4de520659cfb6d2183fbeca2535dc4cb7006227bb8a04b11588c3d44b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBLLT2502608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc9795188f3c074fb5d87390ceed0072d829d27b51fa04f1e34115facc6babb. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GBLLT2502609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7535ba137489e859cf119a1e12e0f172e8e93dfe9e6cd5cb178afb2acaf97b0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBLLT2502611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8ec1ce9d5952d115986c5ba67cce01b188edfe116ced0e63ae7bb370460276. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/GBLLT2502613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558d8dd3691faa4b5ebf4e151d350b4e4b380c41b39d632cbe1891bd1d77fef9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBLLT2502797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c3f6333aa7259b7ac0e94ebaf66e04fd01a123d626893daf434db6a0ff265d. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBLLT2502795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0151874b19108ec40f0bb4098b0594df1939b5b2a9c73c1c2e24df640b4b9f6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBLLT2502796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558d8dd3691faa4b5ebf4e151d350b4e4b380c41b39d632cbe1891bd1d77fef9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:23Z), 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/GBLLT2502797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716a25fa45d7391487ce90ef93f330aa57d4413ba82c010e850a97333c2d0e0d. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/GBLLT2502800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e34b139f870c71494abe2b13e101f1c7205a451365c5be935f9a49dc744de6d. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/GBLLT2502801.