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 0xbe7d91be9d833774c1020d714d4fbcabe8b1194c6b77d03becce4144dc5eea8e. 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/ea738084-4529-48bb-b5b7-ac54dd0da71f.json and https://artists.proofprofile.net/proofs/artist/ea738084-4529-48bb-b5b7-ac54dd0da71f.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 0x8d61b54c85a4818e7f7cef5969e1d0c3fe71d36d6dcb2cf42d4d3141270735cd. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/NLFL72200525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e4e05c2d5e746873d2de7d46fa50da02ceaed916ec7fd6ef4878422592b2c3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBLFP2423042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d6299d01b975661093e705f0fc2cf37421ffa86ba619e800f16b5710ee08e7. 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/GBLFP2467150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2fe1b425914f3e0d8892071089c6e3d1ea7fe376b9b0a10f0b17b0128f5024. 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/GBKQU2445012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efaede302985ee103668171e86a8c45adb81dc6beacaf54cc071651bf7b636e. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZMEQ2277412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8387caa6f6aead31c4b43c156b59cc4597c8faa7d80403d57148395accfaea58. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZTB62265438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9b9ed611be9ec1d03b5edd76d9ab3a21e15a0a1e784c410adfed87a67bd48f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBMA22455640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70298358ffda8cb2563b517055a752b07f068108060091dcd4f5e2bf93470505. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBKQU2481723.
Hardcore Italia presents Millenium Hardcore Top 100
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead1703a2829323462b689cc0c666866b3b4fbea4568fb3ab56af1a62e8d50f2. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ITD132000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed7fdc76595dfb2ae308ab6d250c0ccd8ab7ade59f0d56f8db89168da6d5a00. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/ITD131600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe491f46791aba1890f6df3b5285825f9627cc94dc481ca6f2834e8942526ab3. 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/NLFL72300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4f0014de28e91871429dd20886c3a3fbbb0ced5140d258d6ddf2955c594f18. 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/NLLB82400016.
Masters Of Hardcore Presents: Masters In The Mix Vol. III (Mixed by The Playah & Anime)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00446b73c3fbc2c60e55f719fd13ef18edcbd25de1e87ba9be693ca799722e8. 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/ITD131600251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4372ebbc289e98011b31eac30db4a9bd5d53ce70ac50d963b74c79989ee838. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ITD131600267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f59f14a6b7f5d9f42f4dcebc37d8b7ab583c1fa2017b6da9e4d0051e0cb9d9a. 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/NLFL72400419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dc12b1230e35da599e5f5dbf2561263c3a9e7d27585d1023baa5882ae3e122. 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/NLFL72100568.