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 0xc8b374bd83c3c64de40c84f8d81cda43abc37b60aa486566fbc5d4149dd37182. 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/d0fdc205-47d9-4fe7-8412-b759a45bc672.json and https://artists.proofprofile.net/proofs/artist/d0fdc205-47d9-4fe7-8412-b759a45bc672.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 0x7203b1c31007c936139a62ecdac6fc7d5f851e8001b83e96f0ea765df7d09a6b. 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/TCJPR2261348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569537b3171afd0993350e31672597337503da15cf6087dea84981b5b57b3ca1. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/TCJPT2249310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1214942c940cf92d9a507f0e1bcbbb600272606d41321049ced731edd05f7e13. 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/TCJPW2359419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb41bb57075ec02affcc5eb26ea9a60b48489e9b6ddc8fc55848cfe865e696b5. 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/TCJPW2359750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1d493abdd6cca6867e49ff014d100df957627af1e5d014ead88408ab68126a. 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/TCJPW2359765.
milk chan wants to be a motorcycle gang - pìccolo Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b31df0f88e7d45abdf682c264f3872ba0b8d2b3d37d2fbf5aa9f3f36aef31b7. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/TCJPW2359788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209399bd60bc732845ad6d6388a233da49194a95440a381b2e1d0325811aa746. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/TCJPW2359805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79af4211d9f03c09f740a1ff5a93067a20aeb87da2bbcb6a9b3a69c248a4b26. 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/TCJPW2359815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788e838f69d14ad95c77e801f0cd62fc481bf3c37e35141306378db70ab9906b. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/TCJPW2359833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa5d3948fc2d4debdea3933c96def62b412f40980f01957e39ad00645c628c7. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/TCJPW2359850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428c78c4e7631dd72c02548c72c5aae48974d53f6e685086ca2dbd16a91b0e4a. 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/TCJPW2359873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9602fce095e5ccd09c19ded126e555611b71165b73a24a81320e76b6afeb1b58. 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/TCJPX2333630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f36df389d3add1013dd262939f1aed843db456825c044260fd642a5221814ff. 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/TCJPY2367586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308bec3e87954dfffca62433dc948bb38a485ddfaa2762579a6cf9eeaa0916c5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCJPY2490231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7def93c6d927efc2444f7ac13da56bf4d1db1f00aa3fb0453074f64e41dd8321. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCJPA2453975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de906708270ffc952047c3d62eb8a9ba863253e188bd685ffef9b9d9fb82031. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCJPA2453982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44ab06463e2b407760ae20062edae0a753f3ec9f6f738cd804c02e38f1f4c6e. 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/TCJPE2541780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb463d5e82251cd5077b936cbbf78ae0f0bb68cdef568783a1710fd52a9635d91. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCJPE2541807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a71f1a39ce4a9d05872a300810b1c1f4522aeb53cdf8bcd1843616d49e214c4. 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/TCJPZ2414915.