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 0x7ee38ffef2d02cd16bbd5390cef114d1f2d2b74393dca57968607f724c069578. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f74e986-f2b0-4c92-8095-d1b3535d6c01.json and https://artists.proofprofile.net/proofs/artist/1f74e986-f2b0-4c92-8095-d1b3535d6c01.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 0x843f7b97936e38eea609f818f5b7a314605de8ccff8c20179b0c8a85f9349ae8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P2100608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83b7a61b2a9a723a191d8bd8d7d5f057fcabe71bd7cc937c587079ab6af98ce. 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/USA2P2100606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf52c19217d57d119d4afdf7ff068103ae546f68566104e4440792e5ece46212. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P2100609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b50b60f3e58e6321ee3c8977d6f94dace1ae3c8e3241e355ab83da6806a09b. 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/USA2P2100607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3475e3f0fe4e388b5e4f8d5f207b988990ad6c8479f7fd80735f4557f7c1911. 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/USA2P2100603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaff3f4f9f711900b4b2b49229dcc0f526bbc28f534aaa7a9ceb210713850f31. 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/USA2P2100604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f83a2482b9d3cc087f53259a0440a7e3a5935f5c7b06e1cee98c50523ad68b2. 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/USA2P1908132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08f89f4f77fc2d37369ef79495e7ae45105c5049e8fb57b268523cddd40c91b. 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/USA2P1908134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6c989f00998256adcc2f2cd613e6f7ac5d1fde5eed9ace25529a2557dc242d. 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/USA2P1908135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cddbb39a0abd946ec33014639f83896a57ac87f915e94a4191f64e046a8765. 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/TCAGF2244609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d701e992eb6680ec8603a177b2914c8360c962497cac699fa4f26e6ba3e982e. 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/TCAGF2244610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf52c19217d57d119d4afdf7ff068103ae546f68566104e4440792e5ece46212. 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/USA2P2100609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53136aeb3a51f39aaba66f2b7fbe949104aac32f45e1233f9fa779d1a2e1ab0. 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/USA2P2018072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d81131596fc4dd57f3e3d01d966825d323750a7d8f526e49b371db82d40593. 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/TCADH1783154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8017fd626bc32cdc001d5d4f0e5afa576406dac20da928f872ede810ebce0011. 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/TCADH1783159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d87c40f27dad3cb50d809c8e1832e1fc46dbeb659bf94ac0a07fb811311959. 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/TCADF1797602.