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 0x1632277b89378fa6df3eaceddd6fb08db367f1bae0dee11d306f1d05aa16f523. 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/9632520f-b737-4274-a131-7d84a19e1be1.json and https://artists.proofprofile.net/proofs/artist/9632520f-b737-4274-a131-7d84a19e1be1.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 0x1e304d8a85c9fc563e09be76e554dd12213c42350c2f414bb102ac224c646425. 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/USCGJ1521691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dae96652b95ff0a6cd5f064b83392aa40294c0241961cceaebeb89cf3eb95c7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USCGJ1696086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecf6b53734de28990984187f696d744e9c0b4a4f4f245c0bcc1184b8009996c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USHM81632169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06f8aed66ec56c9c1d1d681feb98964b902af7cc0c3e84dff1bf05323bd89ae. 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/USL4R2049107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55fe0ad66392f5e9a8a622dbbe7c5fa6a8cf0d0664fdd81081f66a2fc22a04a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM22292769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd0b94a507f8d3e110e5066d17e8e5297925de2025c7fa27ab64c5436b63bc1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM22292770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b7468753961c86a898dfe3982fd7f4188e2b5d9923543557fe4e9c572fafb9. 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/USHM22292771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ae9a78380af8e22e1b7f69601adb1d33debec6605e5a49bd5f161ae4281efc. 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/USHM22292773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cb02de87046f45da18e941d0ad25b288d42e59fa98f10309de993499820d5d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USHM22292775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57b0582587168f476e267cea24cbc6b757f0a3f9621c88ca8d4929e7d2f2ca2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USHM22292777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5578af34da616aadba8cda96d41a2a5005a39ae906b4a2db49ce249d70745233. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USHM22292774.
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 0xf68cad57ded21224671309be21de31d4b7496c57ebb21cc2ac011f26236d6fff. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USHM22292772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc25ead2dbb7a1d4b90be6f742c4a31073eabb0f3c785ae82286763e3f4df09. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM22292776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb69f0e04cbbd57b48ea7fa188ce938a55dd53d16d487e1b9a6f364db4eb3e9. 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/USCGJ2426459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4cb85e52495e2de5dfb3a012914ec00b2413e3c0f54f9fd29e6bbba204db91. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USCGJ2426454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c831439d9213f54341224839559e3a328cf7b364b344578c1e4deef2965642. 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/USX9P2416251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174ee7bafdf32796a5eaa2cf2f12a55ea1645b33fc89844c5011d285ae4ca22a. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QT3TB2417995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e3c86d7b8c3e59823b203f23dc0977eecdc074dc306668ab82d3c8182311a1. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QT3TB2417997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57166a11d79022fadacd383cffd8e7dca201bc3b2a752b37fcfe3ce6dc35bc53. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:53:13Z), 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/QT3TB2417999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d358c0d65720a2f73fdf9176e6fbdd285000a9baabaedf63e9343c9f67aae8. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:50:10Z), 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/QT3TB2418000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb195b40adfc0b040c563e184fa10e4dad23eca0dacf691b1fdb577d1070157a8. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QT3TB2418001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99fb072318a7c33018e5a93cabed47c8300a1d0810af67b9ae2fbe1551167ca. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3TB2418002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d28620aa57415879e6631c93a7756d691eb68a92826d96da3132b501535eefa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3TB2418003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87647e01e2568a53f497a4cc56fde136c66eafa1d5e29fbb2126d99b5f93b58c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QT3TB2418004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516ec520455e8ac3219c507eec599c546599746d5053fc342ad0a226f6aca214. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:32:14Z), 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/QT3TB2418009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880a02e348f97d348056a40eaa5e7c56b735fd01f5ab3636bd791fb95116ce50. 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/QT3TB2418014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1deb09633a1cfe410def45ddc664e745294a6d331b8462e384f65548774ecd67. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QT3TB2418015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11f240aa710a5733116c314deb2e6bf7557c1c53a031cad7243bb33a66ef17a. 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/QT3TB2418016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f84d34e70313c79728acf15f6baaa4a6b76388caddf617751578cef66eb5af. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QT3TB2418017.