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 0xeddf6b031712eac77061167140037a44fb2fb84a4a399019eb4ea7755fdf0ed5. 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/f321db1d-2aab-49a3-8e3f-02d39ba6d5d9.json and https://artists.proofprofile.net/proofs/artist/f321db1d-2aab-49a3-8e3f-02d39ba6d5d9.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 0x2fc92037e83362acd4a3e17a4dce1f27663f69f76b6fb5851ddafed5f071bad1. 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/GBSMU6322754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ae4f51848f53b9c44c86db174c7f68480a3bc77261082327ab18e01083a88d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBSMU6320287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4f6580fd9b3cb2298b6f221b8ce9606d5f0897f426a00daa690e0111f6a35b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBSMU7916967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25da85f3bb8841711fb22116c0e00fe438c1ae80ea154ee9580fca0cfc5387f1. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:33:28Z), 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/GBSMU8015122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f546cd6f2c31df5782bbc8e7c5097ce38e942395c23dba6fd3296a1382bffb. 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/GBSMU9178641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb72ec5d9a5b01d2d473fb0f0e7ecf3dc8341b75b6233ea1fa7aef81e9da8e1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBSMU9954428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d4ade37ee4cf8fd924f8e5a86d7be2b146d90eab41f26f6d7f1979a6073ca4. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/GX5MX2137874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd690559892d685880107e3ecadfaf28d6cae70b9115920d58e199ff65cb31b73. 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/GX38U2206048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0a98ef0b91bd38def91b0954c516bb9accb6a67610c4ba0a1281f908a004bb. 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/GX4R52215053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba9ddd7cd8864dc41b7872ebc81ae064193f7de91d4d4a2b0c8d46d33c56961. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GX5MX2276199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fb6cc2096f45d1636e80cd6684d3c7c4c273db5da5fcf7bf9091052eba1030. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GX8LD2341908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc113b0eb5cf3f6b3f33a059f9e1bdf1a6d42eec9bdb8ad8875a29d49e92b3661. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T23:01:44Z), 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/GX4R52379223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312faa85487ce4e108569d46233c5d28f4fae7c30377a4e9f14b0b6749f82a29. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:19:46Z), 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/GX4R52328735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6ab7e24145d3598429626f921dcbb8603f4d6c27dd37218fa3822def87d0e8. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:38:22Z), 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/GXBDS2316369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfe1ee77208b3ee30395ce230a3651f1a55ee715e9a43da64ed3ed91cdd51d4. 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/GX5MY2372164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cd2be90a61e404e59187d6f057779a2b7c876091002144db5aeb14fc38ca1d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX38U2452485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3e62969bd57a37bdad20083011ad096a81801ef8e9d4d2108a6e1cf5d7ef2d. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/GXESV2468168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbfc8244621e50f6b27717a7477d0bda5aa0a3e3a6357ff2bbdfd3e24a76caa. 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/GXFHP2535461.