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 0x3ffa6e74d7d6838c5c56e89cda72d187c1fbce33212e72d980113df5b2e235e0. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c75eefa7-518c-444d-bbc2-c4337cd5db76.json and https://artists.proofprofile.net/proofs/artist/c75eefa7-518c-444d-bbc2-c4337cd5db76.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 0x547687ff406fbad0adaa3f12135ac78defa37d7afd8df6280f4c0a9501a081ce. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKG732105029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bea9dc193a33ccaf3d4dd9536f2c55556178578632e72a596cdb0ba6d457318. 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/HKG732105030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed458bc27c145ab2e54667f153bec0e86c81ec01183199b684b73941635da6f3. 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/HKG732105031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf42638539bcefb20a6e9ee0939b4f90130d403dbf852f24a106d66bf667dd6. 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/HKG732105033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b8aef811dbc3813a2c6a80fe10c97895300545539a9db452ee3442b7b61561. 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/HKG732105034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2862ec29af908da4fec0384f3a2d24887d35000f5292aeac4a849a5228fe276. 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/HKG732105035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ec9ab19c82aff96649e93dca7f157f6bb4261b67e87938825e43cc2c3105cc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:02:13Z), 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/HKG732105022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410fe446e43e9d0b063673e7c23dedd20546e2236ef7414293a6d6db3c0af835. 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/HKG732105023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fae4a42ef2602719d50e185171fe386bb43623feade2645498398c4addf0ba. 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/HKG732105024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985eb61971ed643bf60d26c02c4eee10014cbc622c58bd3b0f6eec7bb0b473b8. 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/HKG732105026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c88bdb7998a71bafadcce1bdf07e80e6208fe7f3b04aabb04c292238a6a572. 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/HKG732105027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa711fdb962b46f7144cf63ae5afaff5f6be16ee1f7da2fc4d3455dfb8b64cc61. 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/HKG732105028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eaa0ca08e5d52b7eeff7a9ad9b1edd446a23b15ee51cb3f20c812bd45544deb. 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/HKG732278409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4d8fa8783e5ec0838355a6c609340f803fd25f478348c47cf7a471e1e29485. 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/HKG732278415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a874c819af034d1f44e4e6b737dedefb3d16b64b2b6a5a047ad2073856e4380. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T20:49:50Z), 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/HKG732278417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4b50b088dafdbe1e61019b1c1a0698f57b46ad3ae5bb69540e90bd8d934a2f. 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/HKG732278405.
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 0x55b9cca7049f26c8bcf22a8787d63646783bc32873f673c41a2d3770752ec298. 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/TWU712002534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753e418e52b21b312ba36ac73e4845ec92fb2f56c089e608a4d73ea8b3e9be19. 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/CNZ481900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880dca64b689908a1850e95996b8f56ec83b80f360fe65679e8d6da211338dec. 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/TWCG52299807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9ffe72b31f5035b68e4d21d308a15d544bf52935a0879179e74d9f092329c7. 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/TWCG52299809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183a0bec2970135ae622ae51efbce6874fbce5b898a8ecf9cebb47a9dc3a896e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TWCG52299806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326f621e2f29caaf25b79a873e5ffb708a638607f412d03bb7aeed795b5cbdc1. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/TWCG52299808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920ae013d10b467f6335870b4ff3578455cd6c4b72c6a77436d5e5cddc4c264c. 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/TWU711903844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612568d1f335b242fd02b9d57371dc6c347fb815566328e9aad47a3d6f0a1a4f. 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/HKG732488609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12cfb67fce8f32cbe35e59496b17d63a08bb3f775e34ca1bb44481c16b80c3d. 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/HKG732488610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e8506fb9e35cedb8f217586077ad8d791de63cc710a69c6ac6ad7ef1bc78f2. 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/HKG732488612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e6dd60075e755c20bfc61096980606e97ed36ed41b1cf9b20f200b58a846d0. 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/HKG732488613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648d1ec20033c94d69a8bfb530e995d36369616202f0deafc78e1372f874d232. 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/HKG732488615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33780e2e4f135d6eaa172156f96087d9769aa36d836de9dac9f5df9dc5bd7d1c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKG732488616.