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 0xddcfefc531bbb82302dd5e097ebe37cbb2624378fe1bdd1e96da1a69dd71195a. 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/12b6835e-3de3-45ed-a693-b11a316ec719.json and https://artists.proofprofile.net/proofs/artist/12b6835e-3de3-45ed-a693-b11a316ec719.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 0x02556609a7c06c3f6a3c940e1dd6e8d987ced5d604a0b3bae7d7c9630cf30ed7. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USCGH1961080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76c0fdeca90660596fffa48fc6e35aa5cf1a278d1f5075c89d64b5e0989ff2c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM91981935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4818adc0182a1418251195c5c74c0e14b9cce9347a916e9d0ce36f6231447d. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USHM91981936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101527475d549b1b7ec8ca255c3286d74114ccea13aafe567bc35aa6f7ce1a1a. 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/USHM91981937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7ba1ecc737aa846f52f26765270eb6f3994f0d984e195fa31fd810c413cdae. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM91981939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b241d2c9e333082cd107ea2dd9b13a927331ffa699ad0ab4991d51d0ce9d08. 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/USHM91981941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd86f5a3b5834d929f808fd7b48ad7f51a682e235f39503f560b637b2b0924fe. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:31:26Z), 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/USHM91981943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5421ea4af99eb83ea2fc5a4b58a1f88bf52b138381512fc7c8490f2ed90b5ff. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USL4R1926757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961afd7dd28d0c53d755ee333057dcc20ad0022657ce74a5538c1465f9f6f4fa. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USL4Q2109975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8aef6a8337731175f14983e5dff0304b1810f41a5684ee23e5501f571466ec. 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/USL4Q2109976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378f94a1ae5b233ed12b2820698c688f959fc323026801ac6c6aad69689aa5be. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:42:18Z), 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/USDY42340394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de19c40105e38454349ed1d4a0ba42fb2b752dd65340ace1c7be36d0ddb5dd7. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USL4Q2399713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b237a9de47c9a697db9478a8cbcd8160d03a57005b4d6b4c2c07075119846d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:27:38Z), 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/USX9P2369196.