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 0x2e714b1d2243e1f69fcc471bd01d4c004f8475bad7a5fb08597694f7797ac8c2. 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/fbbbe378-dd69-48f4-8b22-25fcbc5fd541.json and https://artists.proofprofile.net/proofs/artist/fbbbe378-dd69-48f4-8b22-25fcbc5fd541.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 0x8c0d4a0bbed26566d0bb1a34f6195fb7b4764feb3a84f0d86d4e5a08cc9859f6. 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/ES71G1876561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfcd6d2848b86284520e59078b20c9441ef46c9c7854ea81af527ce1d44bfe2. 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/ES71G1876564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4e5d8f3b4e35aa522557db1f4cdb9fb240e37f32b257372b390824aaab5f07. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/ES71G1876565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5a1904250ca5686a716ba6880e8c2ec451d22671d7c77c2736b014c5a88fe7. 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/ES71G1876566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88a0ba7a64e81b8021fc37d2173ebc8e56a3a8aa4aa3be0f6b0693bb52a64e8. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ES71G1876569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53b2ee9b9ec6907d18c031a2203e9c8f0bb378cd6f37921ae19fe95970c9c7b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES71G1876572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad2565ed5bee5aaf55178176938567729d799f848704096a1f34ae3534523ec. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:26:23Z), 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/ES71G1932910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c3a6780d189fd28c617bf4d507429d20fe897ffbc84d448e380f37abfa36a4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES71G1932912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27c8f06bf470b77d3a82790bb4f2d21fb495f007fc0506c2284b78ed82edf3f. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/ES71G1932915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c238bb3fc7797aada47c12bd33449c18dfed9bb9ab6a4911c630046b8c35af. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:40:57Z), 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/ES71G1932917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebdea3fcc19737b1d3c3201517cc4fd9877ed5b82efaca487f24ca28e66a8d2. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/ES71G1932918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7861b7b052ab8e69bb9b6b185f7cb61d60a0aac6d154716b46d60478b823c61. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES71G1932920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399db2ef46353a6dcf89c91a3958f4d0827255c6b466b4ab097a731ad835b635. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6K2294232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4e4e3f9c41efe6a15c019358c482152bed5160a3011305a9c345278f9667de. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWZ2290673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcbf6d97c60849fc3e0016556a7ae28a330952599827b2fd8ef0d22a2fee426. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZNWZ2290655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1ba3531c986fa08a878aa1de4b5ccfa91032850c7808edf6930b1994109cbd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTBF2379216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa852d7e0c235e49233ca862fedca20e8f444aff0e82dc7de5dac3277eceafb8a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFJ2398589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecbec9cbc3df6be344ffd67b26f4ecc12942215bd44009b98ef45e4f2550937. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDA72413969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf404f48c2045ed8ff8e87679f17ad0149382767339382e7584c3455914f45e8a. 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/QZMEM2494727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814421716bd2dbe41ae4af0593161b820e78c637bbc64c5f6815dfc1cf4f18bf. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZMER2474903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d4a11b47723ade78b1ced923e359e970dadc9ba7bcb0098f2320f9cab44fa3. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:47:03Z), 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/QZMER2474876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9806b75fa23bdf13138d634f5a8aae03a23c41d885ead583d015f6654e49328. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZNWV2473718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53735b2c990dc5879bf3fb5f0a0a8b7f3efb3274574aba726d75b351adbe8546. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T16:04:47Z), 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/QZNWX2456363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fa9bdf41e3bf56e58dfd8714268e0668ac9a5ec77a7b0586b18ce727d1053e. 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/QZNWX2456373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978043175952ac339b1a2ad396b1a6c493ae04bbcff119b29e3ffa186401243f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWX2456387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2716551ffd92b8024d0697d412e5e43bc06113978142a1812a95bee8fc3dfa. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZTAT2484494.