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 0x4879b29a521f2dedfb5b3805b2213e20a3499748be8291850fc943ebe7370472. 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/111265b8-2ee3-4158-afb2-d10fa941917b.json and https://artists.proofprofile.net/proofs/artist/111265b8-2ee3-4158-afb2-d10fa941917b.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 0xa122a7f06dc6d94a8f6b3ecf2625b024cd2aa76ba22a71def9012cd722d80991. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:34Z), 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/AUI441200132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736e9bc45d0a91739d333c502bc962b9a7537ca8751b2e8594b2c1c1b90bbcce. 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/AUI441200133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfcade4549035735528f578f748c6fea7e5a35f6e45d8c70103db8e30d0e1ea. 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/AUI441200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df4d8c52c8cb158d169b873703b352335f5d1da333770f7bd22266b6a3a1907. 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/AUI441200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068ce02c0128aeed515350fe8cd4d009c82e5bf9a02dcb743b21a2dd9e2ef7fa. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/AUI441200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe775bbd4eeda1b569f7d0786c046f49a4522099a3a85b35d6bc9cb8a969333c4. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/AUI441200143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc7e0403ed86d1cfcd91e46daebe482f7cc757cfb29a2806ffc54cf305d4de6. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/AUI441600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53acf9fd4a281397e588b5394a7f60e21f193937508001f0be1f5399a05c4065. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/AUI441600284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a78648698c15816d0815cf4b9a61b0fd956023ac0ed9ea3e1ed53c1910b63dd. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/AUI441600286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cde1c25bdc756c29590e251b58ea81eaa3ee1563fc2f1375eee2d44bb3a644f. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/AUI441600287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920ca763bb365c65d50fa2ac13acdb00543ae2bd9a5c25edf73076a697864ae6. 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/AUI441600288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8464527d4550dd0869fb061aeebfc2c347074d9ca591e799a3148482acfc010d. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/AUI441600289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7a061eea7fd6206d6ca2120a5bb70c695b757966ad69fa6bc9f252b42f3c74. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/AUI441600290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060679a7383e01f04a002fd78f077c06eaa06c1657b10bbd0eb9642341e04d2b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/AUI441600291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bcb0e4bff1870359dedbf4243f62b7b287da47a0b55bf43766a6eada098ea0. 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/AUI441600292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec2a5d180c16c1bd71bf637dd920d3eb360b0ea94324048ea3570138c5c86e0. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:27:56Z), 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/TCADU1849069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a8c818ef8f65439cde79f201b5feb16ab6d20793e0473c0fc63e1e2ff00dbd. 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/FRX281932293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b192af3c58baed822b9fae3fc53c9b7c406518576689c44a5530ed4a3de0b9a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:06:58Z), 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/FRX281932295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9058311f2df8ffb1665b05e7e71c895e262b0cdbccd937b7f77eceaf4cba9acb. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FRX281932298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c7e94a34adf3a6fedca28dabf04707a53fa1daf191ce1cac6a8d81591b2bd0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:10:22Z), 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/FRX281932299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc04d79302e4f92417b3c699b35d9cf3f6f7e4bbd0865df38da369a1a5c0a7d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/AUNCC2100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fc7e6b385035954812125dcda23a0d4fb394d524f2cb39c34c036c2a34b26a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/AUNCC2100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7861367c22edeb8feab9109daef8141552e11cef4134df52a99a1c01f50428. 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/AUNCC2100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d6819f55606161439b0e131ea3607efa15defeb992f89fb62c7c21b7dc19e5. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/AUNCC2100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29910b6dc9198149e2f24e15e15f0fc70d891b7df655e45b06ea9cabd9961857. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/AUNCC2100076.