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 0xf7c118d8b7739640fe3f8b6dea52e73a62f39576dd4e7a943b891dfb6a0a512c. 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/114fed40-e37e-4884-a33d-071ca1de9714.json and https://artists.proofprofile.net/proofs/artist/114fed40-e37e-4884-a33d-071ca1de9714.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 0x95cfdcba9e57d1fdc65fdc4a0633e03b842d543a761e56d4fabb592535027a39. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAS2218318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b705a2084d63548b126f9e89dbc925b934bdcfb5bbeec780a8695929555ed67. 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/QZTAZ2280768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae9633109bfb44e500ebe9c7a6472ecb64f1a730a61c045b6ca52ce0d8e67d3. 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/IT7LD2301178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565764c0e17785c0fbdf79d6910e25b973921d9cea9638f0a4224640f5542814. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZNWW2329525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936b3a0b01f6a65d80baac5a0677cc77b4b72d4ad21ebfeadc8e71767c685003. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ITJY42300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4aa80373abd57ed06addb0525ea70f00920fd34eb5616be4eb89d28a983efa5. 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/ITJY42300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632acae423ea4404f4637809447ee4a7da8fe56c248931d132a6b68d9b2a817d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ITJY42400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb81990d0434428d6c7d83c9fb716f84f266e21d08fba34e281e40b35bdf253. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US38Y2408397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854f16e2ef437fe88131532d7f1b10224bcb28bffa7b8e2b3f7c6af4e4d1cb49. 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/ITJY42400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5370cd11ec3ea5c8e173d3fed6178c35b8166d14d04f251528d4b62d271a88. 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/QZNWZ2485833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3252909123a8aa8c31a764f74eb6baae1db4ba73d7b568000f528e1e8bb8a48c. 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/ES71G2419409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f0100a317bd0d59b9abd21948128cb7307b62d6998d93eb390461808e2ea4f. 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/ES71G2421789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c96cf6442e795edcbb83468de1e06dcbd1f03ecb892a4a899bd3913d00d19e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES71G2429552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b669462b8da81c5254fa32985f7876b2fff7a933e6e30f7464b8d856066fa64. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/US38Y2528621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17f23bdc6973f22b6f0ccbbcb96087f222bdcc8c0f103487ebb658f7d3b6c57. 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/US38Y2581854.