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 0xd0b650e17ff4332e6a49e4030a741c91fece91f13350f7dab9a193e0444ba724. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2435802-e018-4b62-bc63-851c1e102daa.json and https://artists.proofprofile.net/proofs/artist/b2435802-e018-4b62-bc63-851c1e102daa.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 0x404dfafa6ea3f06e27f1c6ecb4147eea015aa32de7c6b65daf5451f3976aa01d. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/DER375060701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f325bc3a9dcd3354498bf7571dca65fed80d0440e7a477aa4f431fb90f44d3b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DER375060704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2059580634dff245c87081a066f4ba605cfe51f9c41f1f2db788fb2c34aebf. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:56:43Z), 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/QMRXD1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305e19f77c17a5721618da7211a09cd40e1bd0fe56b26334d0227bcb791b27dc. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QMRXD1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0c2d008fff3a8b6a987b7d073147134d5cd5bed0ca9c35fc559fc29b0601e9. 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/QMRXD1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2ae869b4af8fb68671d21125f1face7e3cc37e1745619a683916c969d4ad62. 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/QMRXD1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733b256094f23dfd77319bb1e6accfb36ce52038d5d45a594795d7379b7ba95a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:16:19Z), 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/QMRXD1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0470e6acd7be9f469f393b4286dbd0f07b6db3d004c8c050f747b8bb30fdfc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:38:13Z), 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/QMRXD1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b8880b8398416ac441a799db483146d18472c7189581dbd6275f480ccb8489. 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/QMRXD1500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0240182f190b9ba37114a7f5bacc7d23268b516164ec060ba2eae4b061bba0. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QMRXD1500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7276201f3df44a4a7ced73efb07b48f3f9e439ab478203ab33bf89d7edd4e21. 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/QMRXD1500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c40f5e338ec4336e73acaf61f9bc3e1a115aa2adefc2eb9d137f0140278c99. 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/US2762093867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf51c1da4f3a67f4cd3041b8cd1da2cc93a012e2a7e6fc165da627cbb2e303a0. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:27:15Z), 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/US2762100898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc936b7133f375fbe528f1c07ce8f6abbc27ce1239f0dd892b9570640e1102be. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US2762202202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6139ca4f7a53dd3aa100ecd2c1b1849016dc6dcabd7698805901a4ec8d9ee604. 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/US2762405166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f3472d23f9d12924c4b6be9453741165dabf0dd767c2c46412c004daa47581. 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/US2762405167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6139ca4f7a53dd3aa100ecd2c1b1849016dc6dcabd7698805901a4ec8d9ee604. 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/US2762405166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f3472d23f9d12924c4b6be9453741165dabf0dd767c2c46412c004daa47581. 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/US2762405167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e9aecd630cf94cebcf133d956205763d22a7ae16ee80b858f68f4e6cbec64c. 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/US2762405168.