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 0x8aa9258d9f94d5b9ee83462a7e50556b2cf3b3cbd0ed7cdc92b1f6bf0110c685. 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/d63a4a08-865b-49d8-ae70-73b2f5967f9c.json and https://artists.proofprofile.net/proofs/artist/d63a4a08-865b-49d8-ae70-73b2f5967f9c.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 0x4eafa28deb484c0727e49eb1cab9065d0fcbab763f37889fbfa24c8e81b96bed. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:08:41Z), 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/USMN20605434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c97e8fde32dace0476155ece986bec8ad7d10032810d75de87d57c013e07499. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USMN20605435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619e08c230f24d9d1e71a9ba4f7dd662374c614e6c372f5e61a33f370b018a0f. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:52:32Z), 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/USMN20605442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0541bd6a1c142d9b67edf2bc1fb43169f9f9cc1e2fd9b4b641f11b84e0c9203. 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/USMN20605449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf9851ac69f11f0e15a58db0324bd1b3d60aab0fd0c6bd682bd877d40c49381. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:25:02Z), 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/USMN20605450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4f3ac446f8f185d9850647004ec6bc54ae558e5e00bf69a6700967de491cd6. 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/USMN20605453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c334729b498317f5671810f63ef656dfa69a0156bd2c8c15e5020d0f481ff4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USMN20605459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657c27b77b825d5bf5fbd02f7f2b60b5004fa458e2d474dfda04597930cd20c1. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:26:06Z), 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/USMN20700164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61bd10e281dc61dd418a944cc402d12c68e78d3db7bd88374e6810e6725ae0d. 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/USMN20500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa655efb451197f5137578062c04ae4abee6737672976eb98b5f1dc7f6cff686. 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/USMN20604772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4f3ac446f8f185d9850647004ec6bc54ae558e5e00bf69a6700967de491cd6. 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/USMN20605453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0541bd6a1c142d9b67edf2bc1fb43169f9f9cc1e2fd9b4b641f11b84e0c9203. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USMN20605449.