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 0x9319779a2dcd6fac405e60a6077662868933b28d2a907579f875d2b685eb9a4d. 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/6748fa63-089c-4f9d-96ab-986a55b78497.json and https://artists.proofprofile.net/proofs/artist/6748fa63-089c-4f9d-96ab-986a55b78497.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 0x89506afcf3b590730367c94465366d507fae7caa85b8a4131384064d43f0e3b9. 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/GBSMU9283253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1e4943439b337df834a503b99caf68d562ff65ee9ad7726c109af83e13af43. 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/GX3HH2139110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ef5a08f093a9414872b269294341c516ec99a57774139e64573757e0d3104f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GX3HH2142191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec53cc29f9b7f7a95db8aaf6cd37e58618d16da9fffeb1eb381d5ec423625d69. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GX3HH2142194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498657ab757af23c8dfff4b5017fb4d97112711d3389ba78742be826a7fa3c51. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:04:10Z), 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/GBSMU9931834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59826724a5a66f013563269023e66ded28812d6a18e0c12162f8166e8f54decb. 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/GX38U2160475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4450ddd103b03e66881ce3a28871be63438f4a06b557b2b84cd193bcb3e3617. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GX38U2160478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a5e13550434d09d637fdf39eeed580b37e1365bbf5e5baf08411708912635f. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GX4R52160030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56abcdcb7bbfa53907389a53d24ad06c3d93237a0aa767751b9d65e9f146dc4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:01:44Z), 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/GBSMU0012169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4c69cd87be11b9bbd6aa9899d652ee79a34dccab85551a809e4e19172c7dc9. 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/GBSMU0012182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141de68aa8a19099132b8ca785b36d74ebafc99c383ca67730fb68040d281e4a. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/GBSMU0012120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce6dab3e179d9bad2ff4a2cfb31277112477bfee14b9c358b7ed5c419193356. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:06:58Z), 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/GX5MY2251426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2f4d25123b9dd845cb1258d43894a69ac93c12cd1207c2ab97d7a52fc8d22c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX5MY2278156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638e37cea489b013fe9bd716ccaaff529bd1fc26ec135345a846f42cb2ad50b5. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:42:46Z), 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/QM4TX2327444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a4f5e9cbb4b551c2736d5cb5098388e32e5fe4e80f23c514a64d51de64f9b6. 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/UKW3Z2400791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4933d3a466a8a7ab0e16a27f61c94a14d4574f73d1f2532969808f6535e00144. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/GXF972403023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7de1cdc4672d406cf3e11de2a5645ee4b3710e4643f6b57513b2ef4c1b44d20. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/UKW3Z2400792.