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 0xf3dc2ce13a496a3f7ff8667e1b017342540c84686bd962da8154413e7aae33ab. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/292917a1-4318-413b-a4f6-8bb6d35f6892.json and https://artists.proofprofile.net/proofs/artist/292917a1-4318-413b-a4f6-8bb6d35f6892.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 0xf73511b0a6d0fc3d4016e05cd854d4bb1a033b7f9a430a271038c00133b5e714. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/GBARL1201801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2091c61f91e22dce7b8b5b6a71ad8f9f8d72f9938c53f2b3a7dfcfba6e2f94e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBARL1202028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b82456756ae06c929b00de7b5cc006973bb62764fe5da73f642479cade8b297. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBARL1201804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9874ba7a51a5e8cb42f913b25e143cf11327f46de181935485f95955aaabf623. 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/GBARL1202031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435422212c47a759ac089284583dfd0092e36aa39146d6764e8187d005e97c85. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBARL1201805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa79ac17136ebaa0b4055f6a354b2b02540d05997b52388296f50de77eaf466. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBARL1201807.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dab9ab3ad3d221437670d06e7063aca67f0a4ed921e6e79f80be7359b6cf833. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBARL1201817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acfca708f705caf4c4c56577c6a040f80b581eabcf0b612e4160be36afa2ea5. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBARL1201810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecfb9c36cd784fd42882ac35c471a8f0584352b3e2f5148cf427b1dd8a18e8c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBARL1201813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf92f66ef4e437ec529254d592536db188a8b96bb1f0cc1b6f0b10de278040aa. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBARL1201806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c32ce5e1ef8c73f6134c8803f787010d2c9ded1be735d11816942e02e714ad. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBARL1201803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a7f32d209408c8c14078426f5cbf83fa352678e0237b07a1ecff69126851bc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBARL1201800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01c1eb33ac2746535d46bd53bd0e332964ae95914d7381dedaf16d2fc6e6eab. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBARL1201816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b0bdc149ed441faa9fae7f9c05de87f6c607bf225f8af3defe681ea6b9952d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBARL1300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ebfc90a040470e1c52099d591c783f514e637162d80a298ee7b4df4a6dc65a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBARL0701173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c165d78684874059c32373a760a622f20d955f79e5e0fd4947f7dd9b0f28fe5. 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/GBARL9000131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e40308ff3690f892da2a1e9c8fcd5f1da11b2c51635258e7edbe80d42ec2f2. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBARL0400903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43016db40df4148fb52ad96781bfd203fb5021a9ebb3d7c820ba91c8f3e0a47e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBARL1300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42ec8cfc11117d29f18350dc2637523c3ab7e3d1dd58202e2b1eadfb449c136. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBARL1300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e47e5d3ea643a1eb10018f3d5e420b13e05f8a18ebd26df0aa5400b5135db1. 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/GBARL0400529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19532cd2022f0e1e34ec3c3385a9b6cd3e9c6e62bef44c7104862243dde6863. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBARL1300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef4f61322d80e12e9bd032464a3b5881f6016294e742d0c7111894be34dbd54. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBARL1300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee4cf47cfee8d749135c7c4f19004462a1662e52a98b7a84a92af637cf94a7f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBARL1300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3822ac456efaa849d4cfddf789b8b78ee8b3f1390c7685c79d4294a31e673584. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/GBARL1300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608e2ba46f80404ab3d3f316da535fe22e3aa9de8a40db561a231fba607f29a5. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/GBARL1300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7667e4a45a43abb357e8235eca3406d947a6a1f020a4412bcf2a7dee826fee99. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBARL1300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1320628bfebf752faf3381d6c55fb7302f4ffeab1f50a1c10ec0952a0874f54b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBARL1300066.