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 0xd9f1033667b71325fc41c1a57d6d2d2edf6d2b78714fd939218a937b838a7ab3. 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/8775628d-3cc6-4d63-a50a-034fa2bf8b8f.json and https://artists.proofprofile.net/proofs/artist/8775628d-3cc6-4d63-a50a-034fa2bf8b8f.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 0x17c9b6de578ee4fb200602c285486b9313997da1f113b0a4a3e9b7931eb305ce. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:23:45Z), 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/CA5KR2392417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5709bd59cf655206732ca3d9bad2844cd8544a6ea95da710226411a50ac37c. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:23:23Z), 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/CA5KR2392418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fcd5d37f039a773d08f303e45eb3c95881f0aec64039e86be592d4d735261e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:08:32Z), 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/CA5KR2392419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2f1e0e761d1a5911c7717c92b0c3c3fbe57eb761925ad49d6df922ff8e2afa. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:15:46Z), 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/CA5KR2392420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f620c87f06c6ef929aaa8588dffdcb409578afa5e7219450d975dee9307bf3. 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/CA5KR2392421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160b884ed7f9dcdb8839c6d25b8d90bf62005a8bd99025be9ff8c4a9075ce8ff. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CA5KR2392422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59516bb373ceb9f9723e8a1b9bfc696a1f429a005be9a5273e34f9e927ece901. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5KR2392423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2937849cd96eac9554a0f3dd51e197f60994b9c70edd23ac5373b6d87cf1c5f4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:28Z), 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/CA5KR2392424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b950301db947662ca144c79e4f4e4e8ff53e109aa2911fefb5097918b385b78. 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/CA5KR2392425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a28cce3922e6d835928931605353c698e904ed8c27e291884132ffab5c339db. 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/CA5KR2392426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7a2fca3fe07075dd9bbc6d3001b929071a896c7727a2331b754d8f9f4a5772. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:41:16Z), 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/CA5KR2392427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0dc00d07911d1ad3a22dc5ae3aa96bc84ed3cdb00b90419d06323755decde6. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:58:16Z), 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/CA5KR2392428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbe65884bcadab3b1e1750bbf0ecd08c506e5159c52483c8999a92ebac99ad4. 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/CA5KR2392429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40ae338b084e2eb675ac104fb74ae7cf280d863ba83088786c1921aa6da8c39. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/CA5KR2392430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc245687e24f69f5a3230e1829d6622d948aad0f0c2cc5105576bf5f4faae33. 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/CA5KR2392431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02515881d307fa6eded127f01eb9384dbb797f9296aa3c72da090ca76aee06c2. 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/CA5KR2392432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe560c44aed66f80339beb549e0bc2d9354dc595d916c9051f10759f667e6a257. 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/CA5KR2392433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873680d8ae4e10a4985840e89bafd93ae92b86d0d754735732c11c7ecd7a7504. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:26:30Z), 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/CA5KR2392434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6122610a8012b222bf6e8bfc45f2b2b06c6c9b8d1988c960c79f816010de63e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:28:25Z), 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/CA5KR2392435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca820541f80ee109b0026a04509bede01406bef4a6897c57222ae23951f21a47. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:42Z), 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/CA5KR2392436.