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 0x8ecd39003fc1df38fad0823b358aa29e7b706ffd82fc1db3ffb1a536884e18b7. 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/da4ffe5e-7f74-41c4-9a53-b227942efa24.json and https://artists.proofprofile.net/proofs/artist/da4ffe5e-7f74-41c4-9a53-b227942efa24.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 0x84aac153e982341f067abde0d89bd86a9ec29ae2b669696be1aa51c9a587f4b5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FIAVI2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd09cf326fc97e9503dc9b10c1e2a999b04a3aa24be9dc1bc05c37c8d3847a35. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FIAVI2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640e7b0ed96a5e8ac2295b4f90d6625fc6a393134fc5278766bba6b42362e655. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FIBAR2300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cf6202c02f92df0983b218cb652dc1de31429486dde847e351b2ddb6da5e6d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FIBAR2300306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54894956feb99459fea0d2cfce29595e3973cd6380821511a433d36605c8df8a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FIBAR2300464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d06ee5325fe1e72655b32bfe3717620a607eba9a22d2cbfb37de4432f25f896. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FIBAR2300602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293bbab2484b949048898cbf9a2ea077cd9c880b9ccc497b9753ff25be13278b. 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/FIBAR2400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5fba1251578a7cb868854194343d24a89b6ede2ebae8b539fb43039b49c2b9. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:32:42Z), 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/FIBAR2400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640e7b0ed96a5e8ac2295b4f90d6625fc6a393134fc5278766bba6b42362e655. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T13:00:40Z), 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/FIBAR2300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0e29799f5f39f8b73d33decc9520ae687c3f688b9e8579b82f1e9d9e2e6b1b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FIBAR2400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4960a3bef05ded978ed86e362a47050538623cb0deef60ef841c9dd2938779c. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:53:02Z), 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/FIBAR2400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2bcd982ff155f83df1bfd882ef070df30c85d19e7821ea4edb10ddce7ed043. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FIBAR2400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6cb04daded0add1513fdccfc98f8c1c42299025f5e915e998ac2688f7dcefa. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:18:31Z), 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/FIBAR2400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6199f0325d12ab94eba19f19720f55db85ffa3e662dcea34104903ca0ee8fb8b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:55:36Z), 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/FIBAR2400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54894956feb99459fea0d2cfce29595e3973cd6380821511a433d36605c8df8a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FIBAR2300464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cf6202c02f92df0983b218cb652dc1de31429486dde847e351b2ddb6da5e6d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FIBAR2300306.