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 0x18b850acbc5be68eba49709bf6a3e9a574e1fa7cdc6b63a7a40bd81ad6ef34a7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3ec63be-662b-4d0f-bbf8-5260c4bf1fbf.json and https://artists.proofprofile.net/proofs/artist/c3ec63be-662b-4d0f-bbf8-5260c4bf1fbf.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 0xec6083053bd3f8fdf41ee02e47d385e88fd4528d5416880f17d500a380aad383. 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/PLC062113874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8558c59ef0b30d0f0553b002375834b095f26577d8fd6e3c25937a27897bb8c9. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/PLC062114461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a691bf8941e16468012faaf1ff9d992b78c284ad049c6fa893cf0b68634cbdb. 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/PLI362711720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41e21f6431ec3919a7b88ead6bb860828520b9108731d7cc24944dd075189c5. 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/PLI365659990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140cf57cb19074dfc2021c1b6d6131c091a3d9f342e694d0f1d9c8d57de54227. 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/PLI366281100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a691bf8941e16468012faaf1ff9d992b78c284ad049c6fa893cf0b68634cbdb. 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/PLI362711720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140cf57cb19074dfc2021c1b6d6131c091a3d9f342e694d0f1d9c8d57de54227. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/PLI366281100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96da2d54a29c46f9f402d2ef4ad845ae43aadac7d6d56a8340f86bba2ba2220f. 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/PLI364166070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd84c93856cbe8d22ebb4b3fe2e9ba9358ae6b9eea6e8afd8dc0579665459b9. 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/PLC061907539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc5a0b94d1c094ef039e579b1e11f8538491eef40c4ee55e152d7263353efd6. 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/PLC061807456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e4c995dab583fab734fe0b7dc9c7681da5b9b2361abd6124150e9658ae0b0c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC061807453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde85ae76844ba6a94b7b64eb5888c301b555d86bc67327eabbab47cd5aedefc2. 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/PLC061907512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e25e9905c1a700d4ef57761223395dc898476d524f88ea7e7088b1dfba1137. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC061807454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca77c15ba7b3bc9b0410eff35c6c3e586b97ce5a262bcfb408363626be24eb9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC061907550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf766fbb2c4e2af2ca1d35fcbf14e0eb71d0736e60e949e5e39aefd4286ff20ed. 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/PLC061807457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11aa6950409b5d2ecc4565614a62b2a3ed0adfea5c4ef770bc54fa9b8ef71e3b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLC061907551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8816596eae9762925cf3dd457ec0c417258327864493a13c3e59da6eff81761b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC061907552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfc289624cd87d51c64b08aba97181a7752d905a6ac7fb31c2e5f5737d4c779. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLC061907553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a788e49fd9b90ccd69399b4ce39cdf4c5e71fc41a04510e292d368658bdfe9f. 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/PLF242209943.