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 0x9efc257a71786356e2026d7488ca1965317354a8790d97bed63bdb4e7afebe7a. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6dc5eef0-1c8d-42ad-aa7e-5c756e8d7237.json and https://artists.proofprofile.net/proofs/artist/6dc5eef0-1c8d-42ad-aa7e-5c756e8d7237.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 0xc811276e0f33a6655f22c0cb978ff6e48e5ba72ff597138dbb7a82c58071495b. 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/CH4196580619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd6f9d2b952ca28917926064c819ec49929d72fabecd05e20137b53175b08e1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH4196580720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05dcf8d1e72fc6ad9fd7cc970f9518aced73a39318486dca86022adf20a1a9d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CH4196580730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318c64277c3f452dfafc0edc3f96d2b3f3cd00c8c7ea6517581819ecc8fc5232. 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/CH4196580724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2042396555310fb2b5cf87df02855bfde1d7e2d83aa1037bd1a0d28ef7bc6bb6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/CH4196580727.
Que Je Ferme Les Yeux / Lady Diana / Toi Qui Pars / Moni Belle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62327b23763054c3dd02d840c4619c9eec388a9bdeaedca1f93dac3e5508caae. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/CH6542149663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9f2f10ad1525a197fee82f51f935510f9b1cb56e828504c7cb4854486352a5. 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/CH6542149801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da0b0c4e06b09c5084860224707ff68acb7f4592490e4201d1da5d1f76d79ed. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/CH6542152067.
Auea Ra Taku / Une Fleur Rien Qu'une Rose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863fe895fe61a8dc131bf116ceac8cc7b93c8670dc578c12016ded96bdcd3c69. 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/CH6542144448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09da81214643f6ee2c4c1211a68f7bfd6cff81552ed35192b683fd10c24d973. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:26:34Z), 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/CH6542144455.