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 0x297cb389ff8167f0d9cca5bb7c9e1b4d146a66165e2edf13eeb73e6cb754ee44. 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/da0b046a-4fcd-4ef5-828f-def4552a9444.json and https://artists.proofprofile.net/proofs/artist/da0b046a-4fcd-4ef5-828f-def4552a9444.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
オヌミ & ロビン - 死んだ鳥にはやくそくを (PROMISES FOR DEAD BIRDS W/ROBIN)
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 0xba16677bbd5d26c3023ac4f48f0ca919a6e2da535d56a5a0bb43e5ef530899e3. 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/QM24S1800389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6fea0c94bdb351ee0ce722d0d6753af54b379a470c89c369068e029d056302. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QM24S1803577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e370b5847584f8411dec2950911ba73067c228e402eef9ce0c0ccd9bb872c9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM24S1837364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dc3ed1b3822d241829a87d36301d9fb967821860aef4ee07d34f46ddec6a36. 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/QM24S1843649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3e1851d7a1f584dc7a33b76a3fc9446a05eb7e0e472d6be9f19bf61b926cfb. 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/QM42K1958138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5891a6c44eff79e4e31f26314f0362334dea51c2aa31b057c7f9c2f051cfb8. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZMHK2009369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1c4b36c75b0386c7af77ed27ebcfc20a82b94bab50951b6556e95c5ecdbc2a. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZS642291067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d21b75c14c270063f06666db2111838456f37cc72dd88acc92f92ff0ebdfc4a. 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/CA5KR2249077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec169352156e416d596c41ecdae64b147b564604cf2314b98ad88402e0ba88cd. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZWDD2276221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39aaa86d3e9882d0bef5a1b9d72cb94dab2ea25ab6cc9dec878378d2d24212a4. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CAQOI2301870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a26f4ca543a68762f1a5930ca74a8ca254aa4d71711dd20d73b22bfd4fed23. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/CAQOI2302064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd7d3cd3943192717aa71cc89128cb673759cc7689c8411ead8579dda0c0600. 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/CAQOI2303043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29791449a4fd24743993cca33700fdca4c47195e49647cdef6141cabfc11f9f4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CAQOI2303047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c416d737463bf02eb01eccad887879677d6e8dcb0b0d427c0c16c6bb25c21f2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CAQOI2408280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019436540f1f08ede2fc5543a0e53696171034291cace57ab821705fe31c55c1. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZKDK2009368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996bb4c3995e5291cca1bcc810719d56abec4fc5dda874b5a6596bc5deab4c23. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/CA5KR2205453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396d8fcfb5ca321b7365b972235265a96173b578ac4d0804aa15ebfc1a0e2670. 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/CA5KR2271783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562e09d984666730bef2abad8b6fb39dc52d939c4c80d9a27c2c75d3b4fe15d5. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QM4TX2335170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d5217a65c15af26f44340fa1bcee88ee69af52cfdb50ea749aef4532cf58b5. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBSMU6519646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824ae839cc9fffa813b4f06655f78934a7ae335336117f46a1b9742a2a69a740. 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/GB7YL2100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10711895d1208ddda36bf7b08b7a537cd2904bf712efb621f0fd8022a72da49. 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/GB7YL2100113.