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 0xf939f1bc43dbb31addeee48ef17ad0ee1438458f862eba5e1c420641edb1df4e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2b49b78-e4e1-4f8b-add1-e5f11d837888.json and https://artists.proofprofile.net/proofs/artist/e2b49b78-e4e1-4f8b-add1-e5f11d837888.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 0x4da27171990f5814172d830e5380dfaffc0788a20afb45b022ba5613d26249fa. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBSMU8249012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2195e96229c4abe6c2ab11219dac26c6b56a6d30f776db28c61aea0398f1e62c. 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/CAGOO2088614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b369e70a1d2ca07ff5a8175dd49476256bb143524e0479e728e631d59e3cd1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:27:37Z), 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/SE5BU2171877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b5f001852df4a6d7799bf0bd74453c318e9538d969e1b64ec965edd82f6ba7. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:25:15Z), 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/CH7812196303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b5f001852df4a6d7799bf0bd74453c318e9538d969e1b64ec965edd82f6ba7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/CH7812196303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfe1b31f1c0f907228d96cdcd9d561afd4db738a949e5369ca48257e2d290f2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE6QE2179395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09510a46577c0327ad56e957689cefaf05436cd2463bfa8192cb9a0b4c0cddf. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/SE6SA2235899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3cf9dcc36000497096c329e3a37955b3824e2b13feae5e1d5daa06d5ce7f79. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SE6SA2355041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9be73076c14ec39d8ee2eff536e83d31ac76ce0427dc89c4011d2e23733d9b2. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:07:00Z), 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/SE6TI2341958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb282193f6d26ff6e35a348d4723eb0034445a19839fe723f2e27defe39ea6dbe. 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/SE6XY2307593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19dc033b7d78f9433fa03c806ba9229edc416de51800a6698256f0e7c52eca4. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:43:03Z), 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/SE6TI2302383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da826a131378c338ae45842215432449a7ed5dc370c7a0a61a81e86192477fc. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/SE5752434948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb0a1133529055393f3b4909474aa3f5b39e3c3b39281549c466f0b03e456af. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:36:59Z), 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/SE5BU2449618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f54de75bca3cb7dc9be6d9e92997b8c551e8a37d7c8409b39234edcbd6d227. 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/SE5752491549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da826a131378c338ae45842215432449a7ed5dc370c7a0a61a81e86192477fc. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:33:21Z), 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/SE5752434948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccab999e3880cdc4b550813b64b0f680f233600f87562d7833b6d64d22aa63a. 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/SE6XW2402185.