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 0xc3c16c5879d63f7314e88b1328401840b243a145a54c22b0ff95fe3b0d2990ee. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89856daa-aa4b-43b6-ac1d-165e62fe7a56.json and https://artists.proofprofile.net/proofs/artist/89856daa-aa4b-43b6-ac1d-165e62fe7a56.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 0xff0a18c7f97b0ec9d7b168e442cc5cca64827fa95ff8852d30fc6fefff98f44f. 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/FR2X42366051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52fbb7ecf477d281ffb0bcc2a17657dc4e085fa3d86fbfa1567ba6f90fc036f. 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/FR2X42366052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8155c8ae74705956ec0d24341bef75d7258d7524ebe2e969dfe58b1527a081fd. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR2X42366054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bbc52a35d0ad58539cb90d93a6243062ee7807f3140c2525d42b275a7d81b0. 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/FR2X42366056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ce057e4464fba4c4ebbe7069f6f9dfb07d27d07fd4e96ff75851800e01540e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR2X42366055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ee7ecb27af20e7af9ffba3eac45e97c5a186785d6b09e92329f70a4ba2ee63. 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/FR2X42366057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ef1b8873daf0bd2c98c65dbdb8eec0aac94c7569faf8199f112c6ba7b4a4b6. 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/DGA092361609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c72ac86561ed53157d8172f35653275c6d28e15e0fdc15a5319d6b7580605d8. 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/DGA0M2411213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da312207b2e8d03ee7729e853de19d345fcbca45f415de0fe4dd2ee87510411. 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/DGA0M2411214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9419ecfa30650f144f69b08cf746202e64126cb50a421143321fafd4bf0619. 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/DGA0M2411215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45644f14807f6759d8f7dee852a2ec727f9f9474d23ec0c1d5c378c50b4bc42f. 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/DGA0M2411217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f83097490b41e43c0b423703bdddbe25dec8ceaed998ca7e263085443e00bdb. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DGA0M2411218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dee529d2f6723f468241c443443f659b1172fbd209385f217f66147c8f763b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR10S2561158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97f9377846823f8ff6980e3e7c32296d814521cd765a18f409484f160b5eb00. 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/FR10S2561159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8b433bbbef7d086f17fc4cff36ba2f9b6d3fa53b8b01ff15988811cf18b2e9. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/FR10S2561160.