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 0xc329bfb355173eadb5536df1e9212d454c4d569e210ceb43e5e2120b3485981c. 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/e5c5b23e-399e-46d2-86f5-435190890334.json and https://artists.proofprofile.net/proofs/artist/e5c5b23e-399e-46d2-86f5-435190890334.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 0x70a454868bed819db809668c33af96b58be4f29c73c80bc18ec88876fdcecccf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TR0690600056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78d2b46b9e48e4174ed39d8e0c5feeecc352891b95fa5b33e45f27cbdcc0090. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TR0690600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e23f8bab78be1317573ecb54000c3e9a89ec662279febbaa6a38b873a3d25e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TR0690600063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5fbff6b3e7e16183de15f894b095242bfb8b5ce5387d749c919b4785391b78. 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/TR0690600059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f24b9048b6e49a1d304589cd4f54843aeb6a157443eaba6bd9b10f0ee076c4. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/TRABR1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e285d4775669080c9f5132e4c8e6b7b0d91db318b8f3c0f0ba309e56091c932. 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/TRACB2000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834fc4f5e71ed32551919151a7eff937bdd64c0c61e058dc6bbc86355411e3a9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TRCKJ2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8550205bc7260bb18bc7e1ce1f0f3079430a3aa6a32e28005b405812152378. 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/TRCKJ2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea0519a1394bf52921e0812d82d58e08705be0c99d30b1a9b8c0b6ae379d33a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TR0222400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea69591e87cf0171d0ffb3cbc58d709992157646be642cbc58ed0e10c2e8990. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/TRCKJ2400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e39cac2e2506f46261cf40e05ebe683b75244af8c0b0c3bac4aa665f0bc954. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DGA0P2467558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd221b40c9432463695cd2753307be46aae7ba0a2db092e58ff698887d802c6fa. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TRCKJ2500038.