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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 0x7d1f9a4f85cf3f87e962fcdfec41979be37d2b2b08e310c2c05ab78bd5828206. 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/824fefee-24dc-4496-bb97-229dc56d5936.json and https://artists.proofprofile.net/proofs/artist/824fefee-24dc-4496-bb97-229dc56d5936.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 0xd5a1960556e837e714e3c8346d42aa20d456626c1443fae76883354bc1c1dad7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USX5G9601201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533c8b889bf4ed35950d4c12d84add46467fe2582e57a8f6d19797c90777baeb. 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/USX5G9601203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f324b67139a7516a1a01cf2a61d5f56306bf486a32817bf0b4e0d9991386ab. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USX5G9601204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583b6680297a47960a5c15f50c0e6a48ad536d94b67b696e24c600f59b886c43. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USX5G9601205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e3f4d263883e604b955aacbff33eac63276d4a569d98c67872576d33a441ba. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USX5G9601209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ee34da8c550d4a1931d0cb4928f965c4c8a3a5d7cbf5390cdd1106a0ed995d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USX5G8802801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f227937debf9b956e841e5aefb839f6989ebae93acba231edd0073c944f1eeb. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USX5G8802802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3f31c3e30b43b78ac911412c5ec74cc901f3bc86181ef452205ece29e08847. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USX5G8802805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56609e3889be55efc926c0f5de9f85a4b9c5fc804f16e5d4160af11a9449ccd8. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/USX5G8802807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a8e6041d92c1447acf5d8dc04a665cafa58281f61cb4b13f8eb7726dad3356. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:26:46Z), 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/USX5G8802808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adfdd612b99c4bac25f447ff27782fd7ac0ae2eaea1bf43bfef9903fa434614. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USX5G8802812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644f3313664272517a57087a6a61fc0f04cbac63154c96330387c2bd3dc2bd3b. 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/USX5G8802815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba638ae748ab18e4f5512821d4431e32832e32bc829250c0e3a8dc99f480f6ed. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:18:12Z), 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/USX5G9611803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ad81e575399abe2d15a737c3e8bbe1b212238081c81bdd23ee8ba5843bd27c. 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/USX5G9611805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c22464bae3e748f865889d23ffcbc3deeab895c06cb4e428c638577e0dea5e3. 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/USX5G9610602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44aec6091c2f5e3037bf117e193530507fba68685f5ea79ad0de3de43bd1607. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USX5G9610603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8b2495f3c72646dd2e554f5f87ff398c95244206648eb27794ac5cfa975872. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USX5G9610604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b66226ea051767f6951e43348c5a8a3b1f60e753e8906d3aaf6c8578114b42. 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/USX5G9610605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44441b7f5f53afa2f4bf075ca35cfe400128fa4a668ffcad82b2b13c6e6a7614. 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/USX5G9610610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a009148ab18c75cf68718a48e0ae2a336ebd0e9309f8eeb0896f695e93ed7e2. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBDHC0603442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd55640abf9ce414e7fb8239dda622125ed4838b255646074f2bceaa261f7bd. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GBDHC0603443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eba40d1853dc90e638d2b92141ac446027e74304b31aceea00ed84b12cdd6cb. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:04:30Z), 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/GBDHC0603446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccd289cd9e5dc9bcf3d1739049b3b4a8377f6e9affc0f8c59ad6687be6122cb. 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/BEZ100300430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a48e59acbf39f0151f906a4d7a248254b31023d8f1a0b348d1ab92ed5372ac. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USHM81485937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d00a7cd05bf87f4534eb12d5cc4339f6a14e850bf0fda0e4aecc7056a3a6cca. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM81485938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe556eeff18ea78b8c73c3673533e174b40a29ed6f3d086251c2d10cfafe6538b. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/USHM81485940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2a9ea18fe3b5fa1ccbe7901d8332c07ce503404fc14bc4b1fbe9382ad49fd3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM81485941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850a731b87f4cda67d01439990ca871eee7f262a314ebb431c9f9c5c543a347e. 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/US2Y71800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcf65d154bdf31cca94ac1d20ec67ba6c16c6676e2664312bcdd04075161cf6. 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/US2Y71825301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c84ff6fa1f76232692c3773cc5aa4f3f75eab2d09c7a7ff5fed374e2c05e89c. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/US2Y71825303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54194f30a694d7ab6f0426504ddd6ef383636b2019c4b60779c9db6594519189. 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/US2Y71825304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f59d43c668b7c4530fa76c9b0ebe7ae3674c2db86cc7b057b417e5264ecdd9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:57Z), 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/US2Y71825309.