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 0x2c9d08ee44e8a35b1215eade4dc5067235f62dfb8aa32888024419ad5c2c7ccf. 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/f02df1a1-baa9-431c-b221-a2a49244e91c.json and https://artists.proofprofile.net/proofs/artist/f02df1a1-baa9-431c-b221-a2a49244e91c.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 0xc6317e43286125d8bec8ed8d44c9dbc47dae294c57c2881925574631feb10731. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:05:28Z), 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/TCJPN2025335.
Drowning hill (TOSHIKI HAYASHI (%C) Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9224bac489c84eb0cd8659fcde483d25f507154bde6cd9c59e7fda9bc7e5a925. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCJPN2181578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcca22299e558b33897b8b3065302863824797cdc1b6f5fd43f421ce5a6916a. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/TCJPO2107855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcca22299e558b33897b8b3065302863824797cdc1b6f5fd43f421ce5a6916a. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/TCJPO2107855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aef5586a0e71b927081b17fdba3af07c328705152721144b64cbad2c9f03fb5. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCJPO2153820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7014ace92c6b1e796b155ad1d86d4e856b365fc4375f446dcf224abe75b34045. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCJPP2170067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7014ace92c6b1e796b155ad1d86d4e856b365fc4375f446dcf224abe75b34045. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TCJPP2170067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7440387dae02c90e090c9e94c2561b2a4ace425bec25a9ea33ec7c140241d4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPR502400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7368bb5c10dd58e463ae1f9483e1bf058a7a97e7fe40dcbd3e648e936f4915. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/JPR502400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7440387dae02c90e090c9e94c2561b2a4ace425bec25a9ea33ec7c140241d4. 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/JPR502400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7368bb5c10dd58e463ae1f9483e1bf058a7a97e7fe40dcbd3e648e936f4915. 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/JPR502400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586b5ce5e6ba230c5ba2e25674b8857574845dce61658df50e51e6a77c942faf. 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/TCJPC2407537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586b5ce5e6ba230c5ba2e25674b8857574845dce61658df50e51e6a77c942faf. 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/TCJPC2407537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cd6dac4a7c006b0933f70acfdf6e3de87f0cb695a1c36f1e35f97e4951cfd5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCJPC2432295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefcf0a628f7dcf6d78d15f56ccea7886922979ee80decdb8e977b19d8c83f2f. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/TCJPC2432298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefabaa99eebfdc1369028af27d22dcfed4d554aec9e28d7e055e769611cbfb45. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCJPG2518589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a15632e1cd7ed7032e8ee89c452bab64114610e49069deaea245d630238722e. 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/TCJPL2518319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28fe57e1d26ac498bfd06755d5c41b0e6c0de85af992b6d29acda980949ff28. 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/TCJPA2476681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461c21b0eed3a42f13de30cd08409018404b8ebdfffd27bd44297f4f6b7dd6e4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPR502200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f770ead36eb7037f51882bab8af81bb114de4de291039faa9b0e2895a01b9e. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:33:07Z), 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/QMDA62121295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260f5357344cd7123430cfd3dc48c954518c281cd630cc17522db211e2a1f091. 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/JPB602201741.