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 0xd12728996c8efa5678fb6d0409e2da8f867422aa31f2d270a8df86c498fe114b. 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/aa7b8351-8535-414f-8fdb-0f0fb9d60bda.json and https://artists.proofprofile.net/proofs/artist/aa7b8351-8535-414f-8fdb-0f0fb9d60bda.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jam in the Van - Eagle Rock Gospel Singers
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 0x7508c916fbb1f8d4f5838995506bec874ff696ddd0d136774f94e8caa23d1c13. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USCPT1510101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cbdafaedc5db3dd51d4433255f8c9d5440ac780aadaccfed842397d2d385f1. 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/USCPT1510102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c5f2a8b7e6b088edb99481aaf3094d44f469ea98074cab25f2c791beef5841. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USCPT1510106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ba3ca9068a8da860583d70752786434a88d7e01b57dc9c6277d4c5e4d203c3. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:33:15Z), 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/USCPT1510107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a4491252429d04b59e609b45065ec0025acd92dda2968849ef550c49477f9f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:36:45Z), 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/USCPT1510109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f67915b854422e20acdd5ded92587c7650213124353bfc75a69380d10838e9a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USCPT1510110.
Hammer and Nail: A Tribute to the Staple Singers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9560696f8b80148d0ce96fcf81f43348d607fecca0cf84cef99067b59040e69a. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:29:41Z), 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/TCADD1789305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406328dee0e137a78abdfbdb09dbb65a63eafa61b7838ec9db8d047fb4441456. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCADD1789308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae45f5aad601a07b33fa6397caa9727526385ae8bbaf4fabc807b7f58327a41a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:25:55Z), 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/TCAER2034366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed684c7d57ae75f2bd9d7519f4fe56011f01604f0409f9e4912d33c406ebb830. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:07:29Z), 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/TCAFG2099566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4487294ff30ca0e53c374744678ce54d89e222748cfb83f860817afa6cbee3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:58:59Z), 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/TCAJG2592917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacdcd64d85c5b7373a344055ccb78bcad383858834fa84834cf72eae6938512. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAJJ2512690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c61f012200d44adf3e24ead9816ff60629c7f03b8926d64b318944ccbae649. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:14:02Z), 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/QZYFZ2503577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f78bee62e33ea96311dbf20d2882734e97394e213ba546b8cf9d89f916cbeb. 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/QZ5FN2066351.