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 0x1c9fe9f4403a0e3dd304837e14b84460704722705a4bb8927f91c86602c038d1. 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/8070e366-450e-4cee-a8d7-bc8b1e9e37cf.json and https://artists.proofprofile.net/proofs/artist/8070e366-450e-4cee-a8d7-bc8b1e9e37cf.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 0x9fe08ded028640b968d4690cc3ddcc1e8c8582a8795ec3f5e061382285617943. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USCGH2215127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c25c910eb7985c48d955a1c505ea1defc361fced15c64bf617c31b867df40c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USCGH2215129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dd426910e717eed3b659f58c6124d464bf6b52d0d7f26bd5386ff30771aacb. 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/USCGH2215131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9495ea0260f2d261476e572c0adcb993fc900fc118574a7b1673c3a7e757aa. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USDY42260798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef6556e25da30a4393ec3c16541f94480d1d945a3695ab582194e3832769192. 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/USDY42260800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3800f3e00ea5f7b66457cf128b8c2f7a869d634bc82f3a02c6e90f5968b46f4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USDY42260802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bc31ed47ea57f47de44235a5adfc09b67a613e6005187a21061701ff310958. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USDY42260804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae442a578cb6a93a2d53b824c7a2379727c8bdeba1fce7e7d6d7b4c6fd5eca4d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USHM22297874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27826dce43b7741cbbfd7a2126714d58fe9eed39dea350bbf3de1a9da83d278e. 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/USHM92260533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a88bdbe1d4cc93c297ae8d7da0595fd3435764e5f149cb4f392eb97ee9d3d7b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCGJ2301246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7e40601133387c5d0c0164ab3e97b21dafa311d28fb76bd055d345e97ba8b5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM22369177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec338243c49f79dbec5b05292be5552af7ccece1c4b6f7a203a1a4774ea31a6. 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/USHM82345195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51990a82b501b0f69d27f35bf5b7edaf3c9fffb17e4eaa4bbf71512ec2e08884. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM82396662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68ba099cf45877619139f4ed4703741cca1874c11421ed37ef5c4ed7c706c4d. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USCGH2453526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f0d5b76a00e6b88ca20513e8b142290499a04e0632134a9ddc65148c8d5a61. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USCGH2453527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d42a52ecf2e5ab2218a75b18355c9aeaa9b163bf52b92fc4fb5bd6519fee22. 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/USCGH2453528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6423affeb7de399e2c2072ca057abf848919f55e551a327ff41cee10c3e6183c. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/USCGH2453529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d41bbd4165ee6161e06bac33c30a6929e1815ad650a427559bb5f5edcfed214. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/USCGH2453530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1df7e9a9eb5483a080b59d0a2f719c8389d7fec2e27ee6e831ba8cba9a9ada. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGH2453532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342cb6f15e610108789792fdcb1eba4f38eaab4fa21096734d0ea47a2e509a87. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGH2453533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2ce0def9370723b2815935e8eb7954cbe723e04941e0fc4ef7c8a8ec18ccd3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZWDE2418405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351f088bc3168a0b61a65af27b72c2c264a545859b6bb44cf8cd07f1111c5faa. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWV32438582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26967207ca18d3981c943621dc23bc0ad97ab392724a1d013a30650a10729a89. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZZ8A2402227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d895e4d270549b2c50a2e2c6421787e00d0b58b838f1956780e8099f5c88ce7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZZ8A2487188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9034acc7bb74befa74c8dc7761046d2393af83187b55e59e57565ae6f9e9e8a6. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZZEC2424328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4805912ee684a1af2df0ef03479dac3f8c6e8ec21e456c566996194b5982d7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBRKQ2525917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79316fc2e384fa138634e747d8a2e88a46249c02a036ef54c5f27f22f75244e. 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/GBRKQ2525954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6569e032075d69440f672ae6e133b9cd9e50ca1934577f7a8ca4caa2d0afda22. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBRKQ2525935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45dabbcb794ac9c3486644bd054a6a4332da5b1754fe81ecb330061df0ce8965. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/GBRKQ2525952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e9556950c3af4483a2f736a0a804d3767851a6fcbf1fef5f7a8490ac93b8c4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBRKQ2525956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592b901e44932291db9a8c7ed3b5466b16f12bc5fb396a95ba4f33cae5413969. 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/GBRKQ2525960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd098e5108bb2d73ef187ee50fe31e489ca0490b8831f7c3575cf508eff371f5f. 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/GBRKQ2525963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd108092967adce6ef3e4d3a403069f1e8a3a56b97d85415daace7a514866ff. 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/GBRKQ2525986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94c67ccca98af0a4a7fe1114a25744f79546fa990a9533c8211a5be7558e7a2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWDE2536358.