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 0x01a83a46fc186230413ec3f461111f4119f02bbd78a43a204959a3d8dcd7ee0f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a5f05e1-71db-4bd7-b42a-a8fb59a0eb7b.json and https://artists.proofprofile.net/proofs/artist/4a5f05e1-71db-4bd7-b42a-a8fb59a0eb7b.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 0x8d8b991f9ff4c9c4de20e8fb588bf83ff111808e1dafef679745f2105e497547. 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/QZES51946038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588118a4c99da9f28da7f677d09d084a8402fabeea2a60d871fc4ff5689dae02. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ31998876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915ef912ea78aa6845af0e8704b0a5e1f840a2abddb686fcf4f427d96c9c69d0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHN41935628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd258fcc187bb8f1cab33c6579e10319107e83d4f94b16786f870fe1a7617e8db. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZHN81905426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4320157c014d2ff17dd823130916bcb89c4761361b82ad22ff657f3ca8200c38. 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/QZFZ22073402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95c7055d9ad992a5aecee60dfc10d9f99cc92087a7fb1bf1dc1aded79dc3880. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZFZ52041324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cee47df63c111fbabb0521bc2d5e190ba94f1951eef9a4d650f6a87b397e09. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMEM2039095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf220fa9ee45acfae1c790e70f201486e2fcb1ceb38a01f678e303237b52eff44. 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/QZMEP2075738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29abe95788787d52438c54c58a23d0ac72363d823185e0fc0a7a43f6e9084130. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMEP2075739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8129895233d65176777a2243dce4540183fb5de526411da6091f41bc2fc0b72. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZMEP2075740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ffc228f984c280046e8914b42dcbab8260bde939e45985227a4170c5f5aeea. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMEP2075741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236dcbf6ca43368e5e571ac1372ac53637a751f964f0567457a4eb3eeba218a0. 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/QZNWZ2050286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d23818dd1115cb5da3682dba3879b528cd141fc5a4e0852a83df8a8b4218772. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWZ2050287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106a9e588f557d4e228d291ee24b76fa33671e1e60b3a055b24588464be0f33d. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:55:32Z), 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/QZNWZ2050288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f307973ab44e6c82e8ddabd8c7b2c9c56328feea1f44591ce3181dd06b603c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWZ2050289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3890f511b62c048455a9bf69437c2809b0f3193b7ca01a7e0b6a2380d297446d. 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/CH6542230452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf839957c45bf7bf9e6e7bcedbe266e9ee867f63ade662577b605922ed31d50. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:19:56Z), 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/CH6542230454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ab3b223d9ef887645af8c5a35fe530d9ea6c38f9721c745cd689931eb8bd1d. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:59:00Z), 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/FR6MD2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68ccad7d45ffb0478c559228c567ad652131688782f5ed28d932c99397209fa. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZPLR2287037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777a44b7a91306b4817e3019f8296985444fad93897ecea94bead436f05f2495. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZPLR2287029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7442cf287f150dab983bac05a654d59e5684abf8d61b904c56d5adba426855cf. 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/QZPLR2287031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4ecc36a3caf1f700834aca36a7af86aa390848458628170dd76d55f2ade7a0. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZPLR2287033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c592d25ca6e9adf7ff1da74133b261a67277538ee91c53c9c9f1a9a146785e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZPLR2287034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e9f21089c891856bacb3c96eff1db48bc8fa99823e7c0137491b6fc94a2ba1. 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/QZPLR2287035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793059bd54b4094aeec7243f98ef8614699cf23f3af38959501c3b024fb8c170. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:19:00Z), 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/QZPLR2287036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a30125d859460af3315e607a07e1969f5470c96b4a38b560568b2ab8bec5bb7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR9W12344704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1395838fbb5d700834e0e89e8f1032eb8b1f2fd60ca07b62abd77a6bb07ba616. 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/FR9W12346948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f2284cd70e477959bb847f6e0e92ca6cb3cad126c7b4b13cecc6e9e60452c3. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/FR9W12346951.