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 0x642f08bd788360a91db4a180d91b19df1c93c7e78b303b1bd5d6f5126cd12aa4. 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/dff91b85-a68d-4997-8d4c-d3d93bfcf66b.json and https://artists.proofprofile.net/proofs/artist/dff91b85-a68d-4997-8d4c-d3d93bfcf66b.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 0x0fe907e6840092daa72e047ec357b6b329ca58ef75eebf62500c09e0530d7876. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GXBDS2388374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05919a88cbaeaea075560b0d4b3e0902f7ac8f235c8159853049e16d4e15f3f0. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/GXBDS2350690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba80b230b49eef21d95f981fbf234a8a628ebb51e391b14f72af9192e8e29a1. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:28:27Z), 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/GXBDS2368646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78f94e51bf33e56a75834b74dff50cfcd805e322146586889d916ae69df6c2e. 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/GXBDS2367149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd239e8bde2403fcd83a7fb437da2a726f102d79460113a77953e10c7759fb0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:58:18Z), 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/GXBDS2349484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d57d3f5d441ca87bbe0e5bd8ef53f5ff7672be15f4bab7238c6a178726edc5. 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/GXBDS2347063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d030d70015aa2b2d106389f9637daa9512b8015e28c4a7a21d08da86f17960. 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/GXBDS2358608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60aaaca146977e43299964e05e4d2b03be8a73856638753f7016c1bf3f5d1743. 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/GXBDS2341516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5306d29d6ffd00327bca098b0e3e03208580b261a9650d329d3c95f75bfe3cac. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:48:02Z), 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/GX89G2498698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7296f023e71e82f02d88be702fd92915af5032391b1e373044b3081399a36c8b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:30:20Z), 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/GX3HH2423689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aafefe98465c2182d8d2e59ce9cebbdc13c803d6d4c88bb79266d79e40b814d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GXBDS2400417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7653c12c222ed9c5e91943604fb05aeb681de680da03f89b1e7b67747963f1d1. 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/GX5MY2436892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c12915aed13621d7d65e907d93dc62f5d33708f9245ebc0d610f0f4207b5c6. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/GXESV2418606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60409bddf8bdc1577fc7d5f2efd1c787eb149e408c6f85eef7669ea4bb6c06b. 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/GX89G2412773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024c4e5814d316d41e2f0792421d1ac3eacd4604dfc347d5c4b69b41705b0779. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GX8LD2452468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a07a2014c5130976069d7cb064115c790091f7b54465b99db4fa3c6c1dda40. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GX89G2573173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910900036d6dde8cdfbb86f9b4374cf90e20f2c9fcb7269bd7a50f28496877e9. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GX8KD2576254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8319ab02cd3e81ed6dbd954d5eba8d840746fc8c6b8341b8ffa3fa800861f56a. 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/GX3HH2574611.