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 0x5627298ecfd4e8ea89a7938c40b0b6515d5a758884bac50b5f7dd6aeb2d58a68. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59ae081e-ee0a-49ea-bfb3-bcea9c86861d.json and https://artists.proofprofile.net/proofs/artist/59ae081e-ee0a-49ea-bfb3-bcea9c86861d.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 0xbb644ba602e359890b30e5f3929217a8a06b90326b52cb4217bdd4851873fb76. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBHLW2000768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8216dc8a795052e5c1b908ceec2a591f8eeb36ff3c4f2d9d6b5d38c6938af8b7. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/GBHLW2000769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26929ca09fecdbc8326f1335117728b971c8b608d380a3488f5a8a19669e6ffd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBHLW2000770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d704606884cc4cc1fb5cd05ef57fce78fb2f71a3a0d5b869c98d2daacb3c79. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBHLW2000771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9700bb05b70eb5efba5f97c25d8742c3ebae65bb90ac02ca5c1a23b4b929406. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBHLW2000772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb5bc83e3b91f04901717184877336101686f53e2f2266508c559b9ab652712. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBHLW2000774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8eb296de0112d5bd81ed8e44b9f60259b9570e74f53d6f565832780ad89f5c0. 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/GBHLW2000775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f5ef3adb6fcdbbdc9a8f977371a35394766efb7e7e6eac87c2c72f28b03c10. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBHLW2000776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e44146fc17c2ec7cc0350d85068aaf87713b1498cf6b64388738a4660c7a339. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBHLW2000777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80701e9c893d7575a1a3755f7a3d7da3d7cba273e4b19ced6eddf95e5b381a73. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBHLW2500901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18789f6c83ecb7418e645175590e6c7f97023ea145b5f00c6ac62550ee9ed0bd. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/GBHLW2500902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fcdd2376a01ec11fde882c67b8a3a9699a870e12ceb6ce79211a64bbd218ba. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBHLW2500903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac67b1b2c6fb49f78594b894099e4036ed8f6834e3f417fbf6e7e47d85bfafc6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBHLW2500904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0162535961e029c5c01a5bf293306c20b24b6af38de8373f90ae9d120e40f159. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBHLW2500905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80701e9c893d7575a1a3755f7a3d7da3d7cba273e4b19ced6eddf95e5b381a73. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBHLW2500901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9af97c16f6d5594833516c2f4b183eae8b1f69ea63e9f65f7e5cbd9df8090f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBHLW1801522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b269daf84559750538bf1f257aff48dc9657e53d68874c2c938fb56a7e4c61. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBHLW1801523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b54459b343834852e14922ee3ab96a2f51f62221b90a245b99935a10b4c575. 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/GBHLW1801524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815c1f7ff8852888b21a24b3a464468dfdfb3858740f54692b30dd48d2af5d38. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBHLW1801526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2a6663b09ec5fe513d699e28fe5f3fcdbb43d6413d8bc6611fcb15b37c7fa0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBHLW1602604.