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 0x77db31875928c86773f10b5248f0af06974566722b1a0920ed74af3f527e40c3. 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/fe9cf0af-3b06-4417-9b2c-7f88b465a9e3.json and https://artists.proofprofile.net/proofs/artist/fe9cf0af-3b06-4417-9b2c-7f88b465a9e3.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 0x3992d2c186e083b0fb0492f28b62fabc3e2cda6614c7844ab74af91d5a9d419d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRX452239286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a59649c64ca308ee26649fe268b9ecd207eae138fc589b010a2f4d4851e7c6c. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:08:59Z), 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/FRX452233441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2164da6edff15e3a8b9308a1d935cd45e3f408093cc041535e24dd0768c245aa. 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/FR96X1970895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daad8f1dccc53f95182e6fb03ccece676f1d6c4df268763718882d91cf3e5d2. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/FR96X1770100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1059eb97bea71b7e1b6efae6904066926d799b50422a9a9839bc2bc3ddac9aab. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:10:14Z), 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/FR96X1770106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1261b6c160719cf97853d5fcb0c8437a79b4a0fe854988a846e0de9a25c6805. 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/FR96X1770107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971e3ceb7eac96994226748e3cb79764384bd17260453ff3a7c9702bc051af87. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZN882138199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa19a6b3aaa8583728e60b6a064171c929605d79c019687f470631d666cf179. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZN882139402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5776872786885d054f3c20849b30f2205931e0f80a11019d23441636b00105f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZN882155325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442e33dbcfd623eeda6de979cf2892388f5311f057126cfe76a4e0f50356fb7e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZN882322333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649aa70c3dc6f7499937f20af051bdd913a273a27948c0c5f570a8de2c5b5cd6. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZN882322336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827ad1a4709d38dbcf8250a588305f5defca3714d3a04161b1f9f257abdc61f5. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/QZN882322538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cdc0f3403b471918d78aaa1ad004855b64f7e430176cc9f2b17485a4588ba7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZN882322543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bba22d3bbb904b2367e637d28d7709e5639bb7f74ee44597fe5c02521355f5. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:49:45Z), 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/QZN882351361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04ad65d6c605cbbcee9f597e08a86d886af3b78bf818d131fca3dfddee8c642. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZN882351363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad39aeb6961ad6078d8b64d161d5d587cd9d081c464acb0d9022e39c21514c6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ662339791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1655d9e8b6a9674ced404522bada36864c1419c2aa537fb13954c6ebbb70867. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DGA052435482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5265901c6f9a6a3be3ef02fa71388de1fbc029e5201e0ec65d908bca385c9124. 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/QZN882540243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce3955775fb08b7ffaa05f84b27568a26838f55d4ad4e95b12245b8166f0411. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZN882569953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff802777dfe70f6371bd517cb1a0a85a11c2a28fd3969a97676681ebe8d242f. 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/QZN882582251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddafc1bb12f56cc30332605337a78b3e118c7b219c8406fcd0f635d44e953378. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:19:32Z), 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/QZWDW2525757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4ad8dc2e8905591285a75295cb8413006f6dce25a8c5dbbb4ad2a74171f129. 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/QZWDW2550817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57da7d341e79a2e61ddc93f3c777af5aba859be0abf61ea162211848e4ccada5. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:07:44Z), 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/QZYFZ2512028.