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 0x4438c87dc0715b1480b96e305c56bbef45788bb16f58eab0cb6037f692a3ac46. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6172f1e1-1d6c-46ef-8369-257220189c60.json and https://artists.proofprofile.net/proofs/artist/6172f1e1-1d6c-46ef-8369-257220189c60.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 0xf74d9ed8eae91c3f7596382a6f926bcd160f33fdbc18d3a5e790fc8938689618. 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/GXC5E2403282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e748d0faf4e127f76e245c75dfaf43ce17aa9e0b16d6a9f5e158355648770f9. 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/GXC5E2403285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c77ef3ab9827cfd450846ecdccea91c11f8a9b2d056eef672152ea7144497a9. 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/GXC5E2403288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d017367ff163ffc42fd56dab89d55d4100d8cbb665586edb94d7dfce6b17369. 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/GXC5E2403290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662f06b88af6ff154a26a39aad3a0095e9df50fe1ff037c8bc1cd8df97ae715e. 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/GXC5E2403294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede0ca4ea9c86a55388d5bb636c93df899141fe13bfa75a2b3af7c0eac5866dc. 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/GXC5E2403296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f95f1f17f144b6f0d86c108c7623cba437a307e1788d71a48514c3df530075. 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/GXC5E2403297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7554a3daf8ea841cc0379d35eb559c634bbfa81c57e9a89ab8d01f17ba4772e2. 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/GXC5E2403298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f334bb0cb9861271b477a2f593ff1474692710f2bfcd5468cab6fe16a9ce803. 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/GXC5E2403300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be52fbcd6bb78bfdc39d877e1954d6b450897d45479fe11d17c4394c3226907. 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/GXC5E2403301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8124992f6261c35e7ee39d080ca4e310d6ba3e4ecf1066d7baeeada75d9227. 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/GXC5E2403284.
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 0x3ba12763478791bc2be71699220e4233e17d36825a1ce4e5a9177f3a9a65fc73. 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/GXC5E2403286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bef769d80506a0410b96b6d2749b2d1d22ecc00056ef6662281f07d0a155528. 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/GXC5E2403287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2327fa70d725118780f8d331d6dc1ac9d2b6e5f5381d8f6c43c556b49a4c1e62. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GXC5E2403289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8796c013a141543ebc66aa5bcab1deb0d2c4fa0d150f42b3e9be8a044964b790. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/GXC5E2403291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4037a06d39c4af66e0a051df3a01e9deb10035468fb9fb51cef78d7935d1bb37. 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/GXC5E2403292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df337f7df90e525b607f38322d913342a3694cb915f0d9ee081bce1c3c7d913. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/GXC5E2403293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd9dd7f79c1336801d1c183fdb7523eb41ab46f52b73e106dd40039b9f7770e. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GXC5E2403295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac630ce9ed91e06825471d78eb4898bdbfe871d26278d13fb2a1e917b055b46. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GXC5E2403299.