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 0x36d5bc24f208ff59ce8f58c443b8860ee26ad0d2adbfc21297f8b713e80b477c. 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/33c62e5b-2aed-400d-9284-ae7ab4ee53c3.json and https://artists.proofprofile.net/proofs/artist/33c62e5b-2aed-400d-9284-ae7ab4ee53c3.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 0x961021c0f04747dd36ece74dd42ce46676b8e7dc65ea228f292c145277016239. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZ5FN1773705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7869e1b321126458a394f25726de41b236267d99059dde13d54f3a55ad1c2b04. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZ5FN1773711.
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 0x750301eaae77a010f34c92b9e1c91e663cd93a2dd308eb9725e3a038af2aff1e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5FN1728536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0e4bf110061d507a71388a177fa113bf04ec0fa2c2453339b5f9b8180be47c. 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/USLZJ1740437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225b802cc598a40edeab6e6d7749b4902c68233680ef1a6a20d46f03d19e0594. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USLZJ1740438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cf3516c3ec9eb66877c96b86a14870acb248c39064250a4e38e07c24ff1fc7. 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/QZS1Z1622889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2601168554bb5fbbe2da770523ed92390ea3607f44333f0438bb619f82f08cdf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS1Z1622890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0f88f24d4105313c6277dc2478ca86bddcc324369a2977d72f50ce6d18fe9c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS1Z1622743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aeb24094c4722dd135c940a63d6bee57b8c46e0382fd18802b6c8b5e359c651. 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/QZS1Z1622744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea13aa0f4b88390239b2214caf24714a13ed417371c062d500f5bb4f4d5f3011. 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/DEZ651369575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fb520dbb17493a235568b073c2ae06834e47c86b09cf7ac031b1eeb991f97b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZ651363041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09316faa4d226cc2927eabf180c24ddaaf6c00130a2186ecb3a5aa8f1cc7eef5. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/DEZ651363042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd263d859775fbe43d3a330ba7fe7e809ed8cf2ae1a2c12c446c63a14101b63eb. 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/CH3131512128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a1a69d63b92f74d5a6e3ea54b438d0ae8adc7b26972ed8fcb0abf09cf39b45. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH3131512100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89111e19f57ec057b0ccd54bafa95ae94465eb9867e2070c3af03e9745fffd8. 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/DEZ651350479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400b344602e269585e70b4fe6bcd776e50c364d4fa1038e3b15b0fd7798af11e. 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/DEZ651350480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a15023756ec7bffcc2b60819e658bb53411a488a17991bcc49c05e702b21640. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZ651350481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7abefa37685d2e004a78eefcb942ea2075730fb0f71efa5bd4c303688b470fa. 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/DEZ651350482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66922567bf731ca4ff09cf3c7d093caddb8d96aed5b45523fe435a2dcdb87c8b. 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/GBLV61633688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3388acbe0f9d2c4b05eeac99dd4c61ed2b9e5b54f4a4adea2465f8a8066617. 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/GBLV61633689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe0171b600f264da0fb17bbc63cd2f80159afbd7a39203cff111adfb0581939. 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/GBLV61633690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de7f145b25d2ff6dfb43b9ed82715c93dde44a0675ad05a0354216121a47ee8. 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/GBQ2F1157279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c4e4ef7359eeff8527cc488df92eeb94bd8d46fb0df31872a86142bdadb42d. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBQ2F1157278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afa5bad00260fd69aa523cdf0ef1453a3e344baf817c8e1d8b1a451a7ff3097. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBQ2F1157280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec39ad2871e57448af322aedb6819dfbc7991177a82aa6fd403d202c5c3267e8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZ651327650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fd0240ee5d5cfcb02d6db19c995d27a891850dffe294bbf9bfce32e8aba2e4. 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/DEZ651327651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fafbd4e6f674f680756c049bb5f55819693391f1067766743b9fbaa174f31e. 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/DEZ651327653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd750953162ef340b68c6f6dd3f6462d4536178c341525bcc16fac7b14e8675b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEZ651327652.