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 0x1f7bdbba5a33ef43010d5bd90533984fef66a9d6ac170595f25f2fdd0a93b7d4. 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/b9498b2a-da90-4093-bcc5-2d60c37c2ee9.json and https://artists.proofprofile.net/proofs/artist/b9498b2a-da90-4093-bcc5-2d60c37c2ee9.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 0x4223ff9aa6c193abc14191c368cbe7e5f9ef297f1eb2253d0a9aabadb76d83c5. 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/DGA0L2423327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4b183f78cbc997173a067e549afd9bebc813434984a9035f866a0a713884ae. 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/DGA0Q2416826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced2e8ff4ecb4248781908fc4e47ba8106a1698b4b4ba865773e364dd92f4fd1. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/DGA0Q2483886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8458a6d1bf2f6fe19c9c475fecdcfcc64778c8f29aa646355ada30cc75ea17e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA0Q2483580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3bd76ea38d1e545e48687d2a99c077ff6e7dbc7b8d401382cc7a9a8db4cf88. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DGA0Q2483639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02b0431959c3e37babfd9896b7c6498333391f69c89bef2a31fe93ce0a9f16f. 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/DGA0Q2483512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72a431fa6fce79267728b703f9b5e2a5f36e0a2f12e19c705ec76750b7f0f59. 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/DGA0Q2483307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5263b6f9ea418252f3b92964108c0c5a468195f931638c4aa6df10a8e3184310. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:06:50Z), 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/DGA0R2411509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f6807afe46176338b355867297b81c6f1d01f65dad8dd66aa7aa898c2c0c3b. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/DGA0R2411526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af57fa51c8fe6ea0f9a1615dde32ede379bdd34d4a7b60d24fecc8415ce57b5. 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/DGA0R2411529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f109d4b9ea4aa9675fc51f3d68f43e0802e67083c7880bffaca0dfd956c8901. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/DGA0S2419949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe220cecafdbb8204f0add2c2391ac251df231a3a194b73879cfe5788dca36e2d. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/DGA0R2411542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd304901b19824b8dd2a1f757b0fe85130c81ff390ee7edd664e2ba0c7c2cae7a. 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/DGA0R2410845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a5313c9e5f14221185cd847554a450efd66a2c0117fdf99bffd00248298424. 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/DGA0R2446785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a8b8292077238ca8ed97e3287673e886569c4f35488f5c32f67ca2fd96f170. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DGA0S2404639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee00c37a5c9e2bcc99ecbc69a7a0dfd3354fbcd52b64bd6195c3e25d2ad9321. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:31:40Z), 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/DGA0S2421638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca22c5b4caff5b50b24d2c146633525721680cd6420184cf39edc863da0b488. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:32:47Z), 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/DGA0S2425721.