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 0xfcd41634006bdb91e1adbcb23a32e1be7f038cf2513ee8009e0c8dc0a8eee0c2. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5205d95c-c72c-4b59-b9c4-ed74e743f58f.json and https://artists.proofprofile.net/proofs/artist/5205d95c-c72c-4b59-b9c4-ed74e743f58f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Indie / Rock / Alt Compilation: July 2024 (Alexrainbirdmusic)
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 0x76f1d104f674e28871ba10ff0efd25392035ce851a1a984335c1987ac5bca8fd. 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/QMDA72362180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b557bc600536523ecd980f117f3b21953ffdf1bac6bd1acaa6bf0f53e2f096. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QMDA72362181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db1916f5a311a35d322b695176d9b7244bff1ffe87dc6449df7bc44373e2daa. 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/QMDA72362182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6a55ea17f320555c7678de9b73e55d84cd123b7d82b0be8605a9c85370227b. 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/QMDA72362183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324071d3a02fa2ce54086975a79278ee417b5754b310c19e9976391d42ec9160. 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/QMDA72362184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aee058ba5be5fad0f7403231ea2cee6c9ae417b83e002fd65d1a43e381317d2. 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/QMDA72362185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b557bc600536523ecd980f117f3b21953ffdf1bac6bd1acaa6bf0f53e2f096. 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/QMDA72362181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324071d3a02fa2ce54086975a79278ee417b5754b310c19e9976391d42ec9160. 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/QMDA72362184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f1d104f674e28871ba10ff0efd25392035ce851a1a984335c1987ac5bca8fd. 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/QMDA72362180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5d7802f2993b2325858bf319ae62ace212ba14967fc4bf6b8968aafa252fc6. 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/QM6N22296921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4ead44a53d541178f99b9fb2790dc41236852544d628e96919522cef1ec318. 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/QM6N22296922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c2c70d2bba455d6c11d04bb9978d7010def662382ad0ec6cc7f11c2a4aa08e. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/QM6N22296923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5733184257f3d0c7a35c389d9b7eb55af91fff4a7e5e4045bcc2f478bd9227a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QM6N22296924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fd5cecfcd858033760f7ac2637a82ec3d9fec4ada45f456e84d7b7e9febf44. 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/QM6N22296925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4ead44a53d541178f99b9fb2790dc41236852544d628e96919522cef1ec318. 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/QM6N22296922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5733184257f3d0c7a35c389d9b7eb55af91fff4a7e5e4045bcc2f478bd9227a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QM6N22296924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c2c70d2bba455d6c11d04bb9978d7010def662382ad0ec6cc7f11c2a4aa08e. 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/QM6N22296923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d302598421d346e206771b548e6f5773a63c2e77c13d899a746eb8f145ef12. 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/QZHZ62239882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095c4f077c33fe50891e6fe81828de85a5821c3e26c3a3d1e612b584f207f876. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QZTAS2192949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506cc1430fa142743bdc5cad7f92e86e37e597e5dd0f7edb53474ca50b373e6b. 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/QZK6L2119221.
Indie/Rock/Alt Compilation - November 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5691390accaed157d51e3839989a8979037a97e1576188496c816c8ae6d0a94e. 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/QZK6G2239292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40934fd11bbfb3a97a6e3035b050dc6821d6b0ac1f4551651d0e9907878132ca. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZMEQ2297814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d9591cbc0bc78e4ce377506ac0adf21f2b56c656f56782b0300d406d6a5efb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMBZ92251291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73360c57a2d6590cea1e97096194c9502d4e3e1f3a866959cbdc2bbc782e122. 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/QZMEQ2210526.
Indie / Rock / Alt Compilation: May 2024 (alexrainbirdmusic)
Indie / Rock / Alt Compilation: February 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5d7802f2993b2325858bf319ae62ace212ba14967fc4bf6b8968aafa252fc6. 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/QM6N22296921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd017b9fe4f2dc52b0cc20889476f8451e856b198f1db6b01b307f20b37b8e7fd. 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/BEG092200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8885e88795a1948c91a74a3e7321eab3647551f9f742e813bf3ea0e20578030. 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/QZFYZ2316189.
Indie / Rock / Alt Compilation: December 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7a6a2584f4ad64d12ddcf338756e56f2e20e9c9813db86f364835e35e3e7eb. 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/FR59R2327364.