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 0x34ec3cef0b27b47e7da1f3c25f74bb62831abc7d554c96635c60be4a1ad69a7b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4256ee9b-34f4-4006-98d7-854d8a248557.json and https://artists.proofprofile.net/proofs/artist/4256ee9b-34f4-4006-98d7-854d8a248557.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 0x3fce0d85689e929a305b4a34b3c4ebdca46153db5d386896cd01a8f4ba5f647c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBKPL1954845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96f860947d9bdc17b6938063343a43fab3e26d4dd80e8e238d2eb26801e3cd3. 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/GBKPL1954843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27af0cf0992b8aeb4fed33d79c64fe68ab87cbf8cf0f493d42d6905f4669392. 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/GBKPL1954846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685954615f1b6ec77b53825740748759b90cb3f62a5d093084af4059aeb70944. 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/GBKPL1954842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4543b1b98f4ecd7158160d2269a65b97ce4cdee1b2e6022669dfed4c384278. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBKPL1954844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe352217d5af6dec7a00af31134c33c06282120e6ac5936c8101dc0db8e952c0f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBKPL1954849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7fe18eb744e0b722d91d618099a7d795c5224ac76bf3f9387458dc1709a0a2. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/ESA012243075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b722e8eab48452b1d0b8762fffea5f47c573945f77fe70bf9b830fa291ae65. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/UKXN22259551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d5fdd8674261a6a83180129175327a205c8eea79af30ccea09638af7ab21a3. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZAMM2022749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820c1da4c323dd0dfb03772b218adcf1abff3f6366d029781315cd3b4c8a99c2. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/ESA012239536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9df7692c23e5ca1c7934203bbff783307740bfc201549f30f3ba619307a703. 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/GX3HH2583758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc8adb867e260e266d7c49392d8baf15c1355fbfc12bba209b1ea9204878be6. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GX5MY2556575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0225d1973dafc2bf1d6af916e869480b65b2688fa6ceeb34ab60777ad138612d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12323441.