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 0x10fb53fdf29000fcff20b8b3a0f8bb891a3c7c9054767d01f122a651b9f36b8b. 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/b7157ff8-460f-4a53-a125-7dc956ee80df.json and https://artists.proofprofile.net/proofs/artist/b7157ff8-460f-4a53-a125-7dc956ee80df.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 0x3b3ff15032e3ef80ac854f8924c27db4b5f2ffa888d1040b8a7d24f7bc2b4e12. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/FIPEB1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad605549fb79f02fbc1db045983c10271dfe0bc44959d63e1465246db32cee3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:26:01Z), 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/FIPEB1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bdd54c2acb3f88619951b43dd034dd04320d212ba41df0d0ffc07034960986. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FIPEB1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bba58d7cb6d392202569ed70f65ff4513490ec1629358bcd03607488b0cae1e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:03:47Z), 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/FIOVR2000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614c51162294b2b7f4715ebc1c73be770ebda58f86c08375ddf959f2456617e4. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/FIORV2000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33afbdd6ab9d1d68e4c81994b9ce65c6e042cdfa91c54230937de092227cb166. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FIOVR2000143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0328cbdf15f43dc2e6c4dab99488f9088e83d142a7cf4ca8a80008177df5c936. 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/FIUM72100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e615b0b1210d080a674a7102b4515aa1ab0ddbc6863f6f4c7aa13db5e74ef6d. 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/FIUM72100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a94b2941eae76ab38919cd5501be88163339feb1a5b8d7fcd0549739db3777. 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/FIUM72200167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7edb8e14fc7ced4bfaf87951cb89827802bc3532da0f24e6483277c8e4d5a1. 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/FIUM72100182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a94b2941eae76ab38919cd5501be88163339feb1a5b8d7fcd0549739db3777. 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/FIUM72200167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154f64298d8b5ca480e2fadf09750e9b0f18d588b5b7a1c97ea5f4ebda0eff77. 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/FIUM72200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba4cb4e677ab59039efc3069e22605a94d7284105af9db91d58d02a6e21fcbe. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIUM72200226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dfe180326242293fcf3178af92304ed66faccd5f6abe424c933e6e7ed0f209. 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/FIUM72200227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a99cd7dc7540238c703899b95bf727e8bae566d010bf965f140cc0fa0fcb0e. 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/FIUM72200228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2d286c525a0ffef4effe4d21805443e846e7e46186b0aaf4f32634a013d0c7. 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/FIUM72500081.