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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d3b9ea62043273bdcd7661ef20f06acae3167d77cc1222c5957aa69c2b9560. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fcb2d75-6ec8-4b4f-947a-63ebb8503bae.json and https://artists.proofprofile.net/proofs/artist/5fcb2d75-6ec8-4b4f-947a-63ebb8503bae.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4bc4c2c78f8b756b764f042b651b070f13dc424505ee8598783026196b4672. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PTIP11100307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8736ed893375324ac603451e2700fa8af241a075d9f3250c20751bbe2fc12251. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PTIP11100304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa7591314a3f63974979d2b30421dab46ebc90ca5176b62726b9fc49f20e6a0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PTIP11100305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae97b42e354103c56480e348bcc23d66f0017d9375c96ecce0f1e5d0b0a35d78. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DENO20489707.
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 0x5f65b473a0f70600c6a9d9f35e127bd2bf83158ca1318948ec3a6aa030e8a3d0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DENO20489709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d9684dc83ca9b39c592fbf5945f728734840affcbe67531a6bbc282cf1177e. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DENO20489715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74701bb62ad763f6d6d356b9cc6c6c493d006ea7fe5a4db0eab2f873a2fbbdba. 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/PTIP11100309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fd58c36dd852cd91da1f973c84ce083cf66030b07425714d0dfdebb59a40cf. 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/PT2HH1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb357c1cae449cdf68831aa99018e6052b96ecc6b97dd48775d0d3e584938a4e4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PT2HH1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af9f3721bfaf15ef17751c4d272a3b8c948665cdafb50dec21f846e2191c4b4. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/PT2HH1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e5f091496f50016ace824fa25b22547bcfdf15afb4b44af03a59a7644778d1. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/PT2HH1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7f352b9b98220a478e3debcd562320f30aaf16c34ac71206fecda31190bb1b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/PT2HH1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229e7231b89b1b1cd74cac91105bc5dc9a6132152220ca2ba33fe6eacd752319. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/PT2HH1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cad43ce3c5c615ab22ba1f17144cd4eb0f7194e2552b024041197a5a661d98. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PT3N22500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cad43ce3c5c615ab22ba1f17144cd4eb0f7194e2552b024041197a5a661d98. 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/PT3N22500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b47c3d03bccce9dd62aafa694ab1756d0f0b4adaa81711f09926408c093ce2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:33Z), 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/PT3N22500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8245c424b4ce8701f6ce721f2319f1951b5bf36a283f9215944d39ea6bd437c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/PT3N22500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0fe29585490aec1fd8bccbc385f082c7e0b61dd69fc1e76bdcc02b9b72f4ef. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:49:45Z), 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/PT3N22500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4137e7b8b0ac747ac852dca40e0a360ec57fa7b9ab2a9493cd67abe4035690. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PT3N22500006.