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 0x0a24d5e3f86397811e557816c68f07cc73de51d574e80d12f1cbcd6258a5f7d3. 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/49f2ef64-8f95-4c4d-8164-a488808b50da.json and https://artists.proofprofile.net/proofs/artist/49f2ef64-8f95-4c4d-8164-a488808b50da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
CITY FUNK -Twilight- mixed by DJ TARO of Rhythm & Groove (DJ MIX)
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 0x176e5b671dfbcdc2436103c441769eabd77e7e7f4b1ca0788e17d46f248b619c. 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/TCJPA2445122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a0d19673024249fcc27820e4c98c0fac71bce2964e643094c1ec097866461d. 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/TCJPA2445131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdacb3f1d7caabdb6e674e53198c15b14286a1d4f91065dfe24ac5c367c6bf1. 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/TCJPA2445152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188e0d5ef9027322301735b236a9bb5960661958b45bdc808bb33496750616d0. 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/TCJPA2445226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f4f9ef7455383c78a6034682abc1edabbc6c0eb60988267b812b051321a5d7. 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/TCJPA2445745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8129a5f50638c04b3771035d1816e3196be757a6f20f863b2933211f5434ee7b. 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/TCJPA2445759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087d1e66c39f1c79fd7b497b280a0480be11dbd2606a2babe385f66cfdbe2005. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/UKFS52400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0538516d08d943ca2ba7ae4d0f9bddd18ae4c4986953207b96af699716395f. 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/FRX762092167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4986df0d36b9b16c677f5cbaef9898541df6c6c6fdb808cd46209db34ac3d3. 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/DGA072134664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c36ab574bfa49f881ecdc83a15e40690b9e29134321f499722bafab3065f042. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX282032471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018649df3853d3f50854b436c60728e7f7e3cc19f90020aebe75591f238e3b51. 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/UKFS52400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4958d913d28b6aed8500098cdfeb07e78e85e16ba7c0f12c1ed2067598b542b. 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/UKFS52300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61373ba67a0078318a1a328049332389cef38538aa37bb912438766daa5c3040. 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/UKFS52400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434f36b4ec9ff62f5155b7fbeca9354bc3d0d54b310130530b3be3126e4cb947. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKFS52400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c0ed00f91f3818c08a5702f2ce38d3ba5df849f92f2db9f8d4e376259d1f9a. 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/UKFS52300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400dcdff76ee5f9d7be17e1ffc15a993a5a3fea976be7109669105d012c4407d. 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/UKFS52300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efd38f57a1bfdb458fc6573c3a750d9144b26deae5ed5553a6961d0595e1b73. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKFS52300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55fe01fd9b1c2c2967706bd98ba085f9e79786bba82664227029659391b447a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX202308517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d850f5a24a1ceb1bf5e1a56c77a0c07972b66294828acacba5eef30035cf72d. 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/FR10S2292732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6a56da823440118049aa1a008c176104c0c91f33be220ca24e1ef60c6cd65c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRS182142235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35933c8c3148dcec120d32ae777a64494f662a0f268bf4af26f21337837e4d2e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR2X42112165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9c762ebdd5ea4e61d22a52c3ff6cd132adbebfd703e0f7a31c8e35d05d5f0f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR96X2130231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8224d0f048aa0b04047041dd5a1de53e5c43de714f5ad7012ab529d0abe3db8. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:33:12Z), 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/QZDA52105026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a2480c2ce99f4ee183aebcda86292b1c46bfd400c83d65cb98122aa9b94b71. 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/DGA072134663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4986df0d36b9b16c677f5cbaef9898541df6c6c6fdb808cd46209db34ac3d3. 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/DGA072134664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0538516d08d943ca2ba7ae4d0f9bddd18ae4c4986953207b96af699716395f. 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/FRX762092167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c36ab574bfa49f881ecdc83a15e40690b9e29134321f499722bafab3065f042. 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/FRX282032471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99955334e21b772189e6fe4ba6a1926284e94a8b051d9658018de25f33addeb4. 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/FR2X42007434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fced6feb781c052a80a589cab458b0b2f4e5af0f022b50ca0c5234c7026dd8. 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/FRX281988210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc82ceea97f39a7957cec42cac2942a3e61963775a5c6e7ae7902854f60ab7e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DES232300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd71fd98207d5f5126db4885afe423fb2d699083992b0618b7a85347677800bb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DES232200100.