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 0x699f3265f99247a2eb05b3e69391eb48d92d79586b4accbab105c8938c9a1120. 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/0facc258-bb53-46d0-bfd3-a93829260d13.json and https://artists.proofprofile.net/proofs/artist/0facc258-bb53-46d0-bfd3-a93829260d13.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 0x55b98536b76ac7c597883c01a74144a4468a065b362a3bd771a85df0b77006a6. 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/TCAIE2482148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014160549a69d225d3f379f90418b2ff016f87adf94548d4510822509bfb164f. 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/TCAHU2461879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afa34a935623d6ea19e0f343763170fc56fb8ce6b5ffce56668f0c31c2b9506. 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/TCAHU2461889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7c4271c008aad2d51363c3622237e75e31e792baef07baf12509456b39aa9f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAII2404303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e573cbc818289cac93b1a250c68baf132c2420c26bdfb57f1f0a2f385822792. 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/TCAIJ2448405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cba06bb164527acf13d696ec4325d47ceb1346df9592f7332f5eb4e8ad91806. 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/TCAIK2436876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf92651245854fc87187bd7b64454d4e324a41709139816db692ba7d39cd101. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAHM2304891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf92651245854fc87187bd7b64454d4e324a41709139816db692ba7d39cd101. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAHM2304891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9260b26a4f682851a731a21140a068f9bb3f68af0dad452e52c33b0a3f8f4537. 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/TCAHM2304894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979f1d2f15c96282e6da461dc468587e144ff02ef739898de99040f94152be56. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCAHI2319687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bea8aa91bd62418c374c262413a23a365671f0feb3c3dec9ab79dde045f38a. 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/TCAHI2319692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52171b698eb9d469c67722a0bc7992d9ab2092e17e912fcef0f2318503fb5af5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAHI2319697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd174c2a2473af518417110a4c4ef1b78349a878a300f2064aa694da76aecc2. 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/TCAHK2374523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7339055639be3401728185bf812eb13c29c119cc8cdebe03a4eb557c60259272. 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/GBWUL2329044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a5dcd2c5ae9147ae779ab66c915598da7db0b2a57ff54d27b94f4f7e8a083e. 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/GBWUL2329115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892c4a820e9ca43b96a22e1c4e0493c079b5de222329206c2cc36f7b0f6a75c9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTRX2323411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6b983c54a992e565e540d00f106d021b6dcc9b81ef417ca1da7e9636e51dad. 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/QZTRX2323421.