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 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 0x1a7e1530d2903a654f72d7949f205fb03ebd6a74beca2e56d4d3e932f34d38f9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0b2a78c-4e7f-4ec6-8455-48ab6838d2ba.json and https://artists.proofprofile.net/proofs/artist/f0b2a78c-4e7f-4ec6-8455-48ab6838d2ba.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 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 0x7109f57e2edca43079513ab17236f33cae1671f54566cd656a6635fa5b9cc4d5. 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/USJE71710038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7109f57e2edca43079513ab17236f33cae1671f54566cd656a6635fa5b9cc4d5. 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/USJE71710038.
Buried Deep in a Bottomless Grave - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67e80d57309a3a85e894892808dd9cc905258a036bc4402000f0d1f3a5becaf. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/USJE71912001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137e773cd1ae0772762281ea605f743d43c4122f57b4367d84e33a4118f95790. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USJE71912003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb922f5b84aad179db12539c0a2d2849f6df6a650cbea6e667a4123c3374046fa. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USJE71912004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9142cef02b86982fa2fd76cca1c0d53e98cb8c8c1969a7f47966c754883406. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/USJE71912005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67e80d57309a3a85e894892808dd9cc905258a036bc4402000f0d1f3a5becaf. 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/USJE71912001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c45bee3fd3df8acd1952bbe7813a942e9ba049ed136dde9fc9750cae278192. 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/USJE71912002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137e773cd1ae0772762281ea605f743d43c4122f57b4367d84e33a4118f95790. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USJE71912003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb922f5b84aad179db12539c0a2d2849f6df6a650cbea6e667a4123c3374046fa. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USJE71912004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9142cef02b86982fa2fd76cca1c0d53e98cb8c8c1969a7f47966c754883406. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USJE71912005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d403f887111e74977dd5b048f29e001cd72df27d16e17156aded14b33002375. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USJE72419601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cba832a72da18c2fe8e116a8bd001c2bd3d2b167937fb82868e21e659e36531. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USJE72419602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b32b052e4e84e8e9a7bf81f81f6e0f306093e1cabfe25d2f1f78782613d82e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USJE72419603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c0a593e97909d1522f6c073be5f619dd46db8248acd66eb6692ff0a5054f28. 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/USJE72419604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74443fbe21a02905c93f6a5e8e1f0d47916edf13a93fb4c3aa882bc904ef0b92. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USJE72419605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec7e6c877a034861c9cc8e2d8e2ce07318ddd688c0e5eb82f4b3c809090ee60. 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/USJE72419606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8058893ead80866120c487a4d0c2564de0d244d13661d3f3401c2161ca05e7e. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/USJE72419607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2589428463c10214b83b5c6939e5e0bfa15e8889f21dd397c109ebc96b42589d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USJE72419609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a428b71488e97de082743766d4dd35a22d43630d5b65cd726b03cb67bebe95. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USJE72419610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cba832a72da18c2fe8e116a8bd001c2bd3d2b167937fb82868e21e659e36531. 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/USJE72419602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b32b052e4e84e8e9a7bf81f81f6e0f306093e1cabfe25d2f1f78782613d82e. 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/USJE72419603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c0a593e97909d1522f6c073be5f619dd46db8248acd66eb6692ff0a5054f28. 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/USJE72419604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74443fbe21a02905c93f6a5e8e1f0d47916edf13a93fb4c3aa882bc904ef0b92. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USJE72419605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec7e6c877a034861c9cc8e2d8e2ce07318ddd688c0e5eb82f4b3c809090ee60. 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/USJE72419606.