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 0xad95de303572bb9356a23b2238862db980f866ff06c1e3b56e081b5e1042a693. 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/88ce2573-de68-47e8-8994-35a448333644.json and https://artists.proofprofile.net/proofs/artist/88ce2573-de68-47e8-8994-35a448333644.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 0x0b217e17d908b968f2400599b59d79b8b3b24337c70b27c64942891b4f585951. 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/QZ5AB1897588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c813e5df2fe77ad9de3cad0d6f46836777929be4bbf4e7ec2ceca085a9d1b6d. 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/QZ5AB1955537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370710e0ad43e3b91f270df62cec145a11bcfe3110d1f5921a57f65e508c1af1. 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/QZ5AB2085723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a1e5e3ff9897283e39ec9ef9a6dd463657282a5ef59817345fad5f7356721f. 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/FR10S1950942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9078a13bd6dfab9dbda224cc06aa01cdcb70380511bdbc648e9de35336a4d3a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR10S1950943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2757c2bcced960ceacdc694d284bc6d43d90541983ba324a4bea280f7bf63bad. 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/QMEU31614069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8868d0ab63aa2537f672833bda665f9ae33c290188dbc441df9d46d73954ed. 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/QMEU31614071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2985e414bcf1a523fce967c345bffed02a9ed1ec327101657a3405f66dedb74f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG1742307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7968c583a6a284c61db272d7e3c5d95f6ab6a5272779c9f9e8bed7c6ff639b5b. 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/US7VG1706872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a1e5e3ff9897283e39ec9ef9a6dd463657282a5ef59817345fad5f7356721f. 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/FR10S1950942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13abedb44060ba6cf9a3e7b9eacec5965259a757256f434bd6653e9064119e51. 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/US7VG1596479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22188de31bc788d765bbc0f2ef89796d92c1fa5889e2076a2e8f97111e249b59. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US7VG1596480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa238bf246a6197cea1dd9ec33b1c1e3a0606504262c369095632add095272657. 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/US7VG1596481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12196f81d8091487a237fd238167e25532ec77c370662f1cbbb94e9c4f2d8dc4. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/US7VG1596482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbeeb0effa714e47444e214c43a7c59baca4a43fc3531cdf50c983cfc44eef46. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/US7VG1596483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddcd1d0f10191a360761e35e384d116b48e4980d766dce2f63d370d838deb5e. 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/US7VG1596484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2d450da80643fc1b6994e54a9f3590fe0859a092733a20a26cb214c9863b0e. 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/US7VG1596485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65877d93465c3606b513e8cba141ec3a5da758a65aa368b99f98ac05e7e98d6f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US7VG1596486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaece563ad33503b2f9bf29d3982c19f9b5a6f1d57d09dca65b5b0b5e71eb697d. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TCABA1145710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733b573cb5f43e1f6a0c1ce195e903480ede13d44d20d8e911f6b7a2f9ebaeeb. 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/TCABA1145711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb6101aa6ee084d430f3c5df7e795bb9bfc94cf78cdaeb6184b7149057063f0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TCABA1145714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331a82f92f070053db3c9dd45d157518292e553bdab7958577ed6f5380802109. 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/TCABA1145715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44cb602781660c8a4c6f7f0cb72273e828d1e2dd1c843f8e16c1a60c2e73a90. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCABA1145717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a648eed1dfd64608dffbfd9ea1d2363bcc0a4f8583db98c2b756ad4691b789. 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/TCABA1145718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949c77d31ca9364e3fa33b345fd1fed66089606b06a03df4b95fd7b4b43bf0be. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCABA1145720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a650da2afa04902a28b54c9c11972d1dca84961937b1b86fd67c20889b9c4c6. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCABA1145721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd7a950b8350335a6dcdd2285ee9905c3eb16081f9961e2f2ed606bba0cb94b. 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/FRX201952223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec198577bea630d9dfd05c5875672fec7ce6d9da6e757cbe1d49ca54a6072db0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR59R1996674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68edc97cf9f4dcd676364b9af3e1f2cb5125b8cd6582daf9721e0c9040fffe98. 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/FR96X1990005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888a60396a5fa6ec16841611c3a0e2a35578566c96eefc03c8d0ee254665ae84. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCABT1433276.