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 0x4421f3b52469bff7db9c8c9a2be5597ee3a3f94212228dfe71b4924818043a48. 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/88416276-6489-4acb-8d81-87747955b2aa.json and https://artists.proofprofile.net/proofs/artist/88416276-6489-4acb-8d81-87747955b2aa.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 0x53696d9e0f738344a31e9a36f95fb29bdf3b281f0ba41894ec350a7eaa858e7f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAEN1995024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ff2b5de3f9226fdd286389601b9b1f434c68c853595f1cbc274e1ceab1fa42. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/TCADQ1899065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2dee0c5bbb58bb352cbabbbb8c5ab0d26d2189acbc559e282f0c7db9dd75aa. 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/GBMA21891168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d5a7adccddae375e0539e41ea51507da941276b38009c5dbdf4a0df6786ace. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2056883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d59d04cac370240d60276e10888653cc7158de5562c0e12e7a62d689a50df2. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAFE2080374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276453c8253da9e27ba429f7296ed7c0c4399f636a386dbf264803918bf7d892. 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/TCAFP2104613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f93ffebd8cf4d638ed18b4382fb487738d30b176796dd47022ab3600894ac5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAFO2164825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e9790f65ef7bbec902b9678dc9eec80be3a0e6beb978f537d3b91d8153a375. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:05:21Z), 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/GX3Q92303145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663005b5fe0ea7c9c0af049cbc85ca27d2c44b3f5926f82da01c7ec3528c99a3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:18:38Z), 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/GBLFP2490464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bacd25b9327d1ff242345366cfbddeea83939f3f567df9c7db1c54725699790. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:26:32Z), 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/UKXN22475881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd09d6997af1229994626487df4b1692cdbc00add2c551872a9727443478cae0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKXN22440323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd8a414e456bf7edc648e246937b570b1e96cd9b609d4f3a63a6dd3a5f51f85. 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/GBLFP1715012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7ff29e7738569d80a09430b7ce0f3bb4ec6b97b16e561249c88064ba88e490. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZNWS2287049.
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 0x2129a35d9744e96303c9e7cd69707dc54f3003ca4ae6ad4dfee1ffbcbbd86d5d. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/GBLFP2251829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dc5a9a0f5d2613ea688ec236b20742a60a7b76caad79ef1a36b0d0176b4561. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UKXN22464785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf53037a40695710c0438ce676b8103834ffa316a13239ab0459afea1e0d100. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBLFP2378994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618177eded8c4a6215d541e90994c282e1340942cb73fe8ee3fae5b5b8df275a. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZHN32289229.