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 0x5a6eb29eb5e55073b7442c280dd781c4f751fca69b025e5dcbc34846b69484ba. 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/0b9ccf61-af87-4331-9f33-7366842d4174.json and https://artists.proofprofile.net/proofs/artist/0b9ccf61-af87-4331-9f33-7366842d4174.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 0x665d52faa33653c3fd198e4550e3aa72d366b14389c6692196347bbd0add6e07. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/BRROF0400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431eb4e07d8451ce961076ff08467711c54548befca76ab6616ca399822ff7e7. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/BRROF0400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8184aee5e86cc5dbd7e4d04c661eaa275817de4910f0555f290c6b39fc9666f8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/BRROF0400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cc7d61feae2bc66230f7319864db235b1af91681b7e5482aa9c0b1ce13b119. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BRMO42200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9f880291c9b4f73c3a118ff73d41c021a0dfd050fb70c4cde2aebc95a03618. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BRMO42200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3aff709da713166f6e31e96ce436ef11a5fc01326c1246971cf3c1768bb7b8. 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/BRMO42200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4349238d578763ae39910ce106f91b3ef0dbbb8a8ca7ef84877b78e9f985ee39. 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/BRMO42200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae927b78328d93af4e9a134aa1961ef6b7fe35b4e83c6102f171a7a268d0f0e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BRMO42200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead75a0a920d3235bf2f9a02043686282e286d9ad0248652f40ef4293180de7b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BRMO42200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd294b5bd7a7c69357677e118d5e9930d6cf9f4622deb7042c273b56e348441. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRMO42200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a93d03ed188827a4c80ff7841dab1b85248fde84e7de6ce2f781f0cafd262d9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BRMO42200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a2ed489498b80b31d7234df9a12da50122abd0b5d2b1db91cf32b6859ae81e. 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/BRMO42200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbb3d346d5d65d294c6288ba3794bd637196d57ca823b7ff1fe5fbab8684864. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BRMO42200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f21af6cca6eb67fef645f0bb1443567dfddc8efaa8a7a419583dd0387faed8. 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/BRMO42200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0db0df8ac4e81e9574336900d3ce439bea700186068c4b4ade419a508b08dc. 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/BRMO42200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cefd0fbaee9cb9f7a01cde62e3b012496df4d5354e937d3f7daa36998463e91. 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/BRDEP2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62fcfec812cdcdf787e415b42abd1e57795cea24774edba7b307e7e2e6771c7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/BRDEP2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8be0b8ab3762ef0362f3d5a1a57921cbba71cfe1e794faddfa8225f6525f7e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/BRDEP2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ba01a94482eb2a0e92fed1cb2469dbca7fcb4d61c7bebd4556993216af0fd2. 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/BRDEP2500013.