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 0x4d35f5c5922f4103979d60532f4cb6daee4c23d647335e59a66a667968f9c354. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb50de02-2b7f-4a90-8719-c4f9b5187a52.json and https://artists.proofprofile.net/proofs/artist/eb50de02-2b7f-4a90-8719-c4f9b5187a52.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 0xd199c4be8659c78d933847b95afe22fce2f53803e439d5ca1365fa987303b898. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USHM21501030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6f7be5add4f57c026113cddd124049630f7f20cc6cb9194a517aaf34d38b99. 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/USHM21501031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e31cd276b0db68fcc98ca55e0b3f8dd29e6de8dceac1854980cb452abed604. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM21665958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8f1871a1f51bbe69377aa5f4eeea51808b5c7151039bc94cc7df407e76bc60. 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/USHM21665959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744bfe6ab7d80dff8ab4453973ebb1fa1ee2b214526356314e78c208a2582168. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USHM21665960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3fd14acbae8d58bcd74680edb623b83b213847fa9074bb222da24f4df86ebb. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:40:51Z), 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/USHM81779477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec7073bb47fb39d31ec8fed4e6e433d385a54f269056d912913ffdb9558b8aa. 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/USHM81779476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ee2b4d0bb22c8c50b5de2bf67f9636ac0fab45c8ec9093fc0737dac3523569. 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/USL4Q1805222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc04d0b942fbe45163a80d1a18b11880debea584746cfd4fc84b9a8173239689. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/USHM91952387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f86aaeeac4a9a1782ef292f3ce614a6b61f0491bcb40b19e198f1e2778638bb. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USHM91952388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139457c2c3f9d2ced654f10853b97edff3c7241193d45730df0564732c7823d1. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:03:11Z), 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/USHM92178028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3f722fc188e8ec54d46757c8a0dbc8902aef82d86349d11617981b514f5349. 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/USHM92178027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b4a033e0baf8e7e903d8ae09f116d53140472a555350ebf68246698a3a8030. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:27:38Z), 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/USHM82218940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1e9809b3b53d14938906aeb2a6a2bafd0a314f4fa65ec0d00d5a3da5c04516. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:02:02Z), 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/USL4Q2303318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bb41018daa0a3800233d473a9469939e74142274b480972b4917ab2e024769. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USL4Q2468059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfa6105280420187c8675506fac279244709040b476b01c5b1ca376cd416273. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USL4Q2468060.