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 0xfa244e9bec95b2835e7cd1d7773f619574c806c6bde7b0590f3f09f94424bbbf. 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/42e220d0-c490-412b-b479-93464a207ca4.json and https://artists.proofprofile.net/proofs/artist/42e220d0-c490-412b-b479-93464a207ca4.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 0x82c6387d018608f16d3508b571a40c67ef08400014906681a4dcf6e4a161695b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/AEA140703190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0964c3c941199399da0178e386f25b069f0aceef903c3d5c3be057c348c4e2. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/AEA140703191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c522b441be4d5da84b314041c7019b25a1600dc56d88460698c096d85e91c2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AEA140703192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4775e15fae6ab977f987ab94acece0cf868b09e0943aade72ea7f64b951edd. 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/AEA140703194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1dcc94851ec7051aace5812ead95777b4056ed6d93c5fa141268a06f50157b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/AEA140703195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718c91e2810ba7cde8949296cee1bf461d8ae21635334c432a7602efcf27e605. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/AEA140903662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb4acdb4a00203db7067f0121e27379b9fd5b47e5fd3b5940c7fae8b732b021. 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/AEA140903663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c70b2ad1b02c937fdf40f3ab239b81f91e96b0c604440e05071bcf76758e09. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AEA140903669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc876e6b194d09632b08c4c8579f776dc8d75d5d0aae539be81a7c684e995d338. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/AEA140903671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d0e9fea5878f8358f11aaa1ea54cea46f7b48ecda7bd011515548b67460779. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/AEA141003441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcda8b8f0dbddc1530d174fc2cb8d43192ad27aba752d252df7c471308b5eef. 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/QM7282502785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a1e9535f8a0d9072fb29ab30c2d2a7f6550df1ded246922245e9f3dba81d33. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:46:48Z), 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/QM6P42598864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bd961b75ba918e610e041a799ca148d83bbc74a740b9104b4cf24a5d530c7f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6P42598865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5531adbe76e223963dc56d49b55b59b613bc63e72312e28078c214e8b890dd. 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/QM6P42598866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb5e2126e7c2ccc59aa47a047842468982dfbfb99c7214faf04196983858113. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QM6P42598869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0cb91740c585c6a1a9cfa37e2789bd38d6f079c93b9750d78eac50064978bf. 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/QM6P42598870.