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 0xb0c807e89441b897d0500f896b2ea6caf214f0ec3ac3c34005be62a5853c439b. 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/a3b32e2c-a846-4378-8f8d-528653c26e9c.json and https://artists.proofprofile.net/proofs/artist/a3b32e2c-a846-4378-8f8d-528653c26e9c.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 0x02234ead04f757703d05ed14a3b04935facc51fb2ccc79ecee716ab2e03d2ea6. 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/US3DF2035781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ea62c679b141df8d806785e6e36e45b757dc04e9de9c37a0196d70c68305c5. 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/USANG2103255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1a9f40d794d8348591b4e566e764561c31e3c8e3e7210373bd92c2bd4dab2a. 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/USANG2107425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7af95c1453483f2b4e99919b1ae062c702f6c171d62632997960ccd55ab660. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:07:29Z), 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/USANG2107426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ae017182159e08674b4afa8008647901cae8eadf4f3607620d88b07f969c70. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:48:41Z), 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/US3DF2136343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe89dd24223dd1ca9e7d4a96fa7b731e0de99e8baf44e82c00497e34c08070a. 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/QM3DF2156589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb939a2c94c311b92dfe59ddb72ef4401d93607021b74a0201ed5304771ba875. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QM3DF2165519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe89dd24223dd1ca9e7d4a96fa7b731e0de99e8baf44e82c00497e34c08070a. 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/QM3DF2156589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb939a2c94c311b92dfe59ddb72ef4401d93607021b74a0201ed5304771ba875. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM3DF2165519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dc453198cd6f59ed1de54781540a84f8148e4b2a2f8d9406754865c1fb5269. 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/US3DF2241795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2f2745026e77aeaaba38c439d899d0e1eb00cb7eed20fdcd01cd244ec00dfc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USANG2253970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ea62c679b141df8d806785e6e36e45b757dc04e9de9c37a0196d70c68305c5. 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/USANG2103255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b68ed8386c5552efc8d1f4d53efdeb40d8cee4b4f1f12900796931a81c64f2. 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/USWD12219922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589518dc1c62d18a91630b616d1bef1a014b0a41a4a5a2e597aed1d45822ec47. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEQ022111457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd695b9d554a3578bc53c8b34d2c48989f65378908695a3ceecd4869d340ae4. 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/DEQ022111402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e84d99233997a3ca8fef26ae7af3bef17ec020b98b92b4d313386304339f009. 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/USWD12213878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8f725d73178f6fbf38179b90a65a9d45fee4e99ee84e812774b546f40408c9. 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/USANG2193992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8f725d73178f6fbf38179b90a65a9d45fee4e99ee84e812774b546f40408c9. 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/USANG2193992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a3eaa355c60fcc0bec6fc63483e299b56a92070579604085f2d0213bc602a6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM3DF2190520.