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 0xd578b0ed56582c8474de2a0a72ff0a19997e00a262aad4f04b60c7b7ab709a61. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0af85b87-8dcb-4e64-9c31-735ea155ba70.json and https://artists.proofprofile.net/proofs/artist/0af85b87-8dcb-4e64-9c31-735ea155ba70.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 0xb8cd80ca9a7955ad651249e15f20d2e6d71f142509a2140c9a5b5d878dbd973d. 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/QMFME2434478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0501384fe28ba28a738ebc5470521371058071b90c4f4a84e404b28e974271. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX762273602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c4826527a6e6b2f3afd9cc24f96d0d78deeb2f741d62f6e2b7fe67416dcc9c. 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/INS189717482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fc45351d2e748679f72666c9eb6ffe5ef6666a2a8b4d50ad42c47f32401426. 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/INS189717483.
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 0x601e4b21c3739def42f5e214e9d8b7cb5ece4569136e6bbf6d2b622a4198a1e6. 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/INS180482512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f5e27f770cbf38d88c062f45e9a5715f5675aab41835693df4da777771b891. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/INS180482506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270623b5244875bd3c5db96c7de104bdb365b521727c8bf44d94e7fcfc24e3a4. 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/INS180372262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4717318122b49f7f687be6aab7a9eeba366126d9b7b64d38f06492d12c0ce63. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/INS180372264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118c8da986fe6c6791d14b4dcfe247a7102ba7fe96c4151c6ecc0c379ee17d8b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INS189717066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa517de2df0b640783e637fbf76942e484fd985bb7cb2a01601c9a3b0e16f3f33. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/INS189717069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffecd03007d366af9fa61cc5b5345a0b6481679d9d409d1316e27bf2e410b2f4. 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/INS189717072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b602b90f56385ae729baa996d92f3f83dfbe71df42239ad573acb19cf340d6a. 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/INS189717073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6612e9fdee8ffa9a848b7b5df46788bc9f1a25783bf508cedafa8cbd59040cc. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/INS189717067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6581cb5469f9f9e6b106a705a219a7583c5af807cac227953f195cf65d3d5c90. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/INS189717068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de5d9767cd16001ea7218b775539bab495937940c7e739bbfba289cc76ad74e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/INS189717071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d1d4e8a3dc2f351ce522029a3625afb8e38e8bf8311a848045d1ef1e71ab3e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/INS180259296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fed52a19725909f507a0a9344c591c27d5f1e94eac838d2911e62b773383f6. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/INS180259298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63e96917ef3f4360626d164ca7e8862c1d36435ec7fa101dcead4b4c8cc2199. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/INS180259160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5308cfc225c771519af1526ad3fe40d96e543e544a7847ccb70fa5ed95f9424a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/INS180259158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6a5a331f928b8a575b6bf4250591ee449ae54e7b0a25aff8710382a67d7fdd. 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/INS180259164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d128b0d4c9cf89ed25f8478b1d95040d6975dbd4689a46471134db0561dc3b. 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/INS180259165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f426ce2f8b7af5992975e400d9d089315523d5bee7a984e6104b8719eb539c. 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/INS189716586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3bd01e10a23781302368a1577e777721a8abb7ce2c6143750a55928992b8ac. 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/INS180259000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06135817821233e0c7ff03e904cbdab0dbaed3adcf8cb17a7568d05093b64720. 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/INS180259003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03aba525c204f97c5051917c1554bd46c8809406ae96707877d3ac0ed8243cb6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INS180259004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2d8e323e117da550b1ac7961563be1dd9623f80332ba0696e10056192ae322. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/INS180258998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a73d210c48eae09214764c62b9390699e55e2dd540fe83ef81f84b3bb53b2f6. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/INS180258999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ed4a12226fdf08ed7f9ea1ad27eae164e793dc1ba2e3243eb445321fbe629e. 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/INS180259001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2f95e4df41a4646223d6ba51afffc8342ed77d7e4278a49f065b2c262b2e7f. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/INS180259005.