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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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bdc55b4482d27c4ae88346c1c356ecdeb161507aba146039aa383074ee5444. 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/cc0d3c12-d20f-4d27-99c4-7221b382a888.json and https://artists.proofprofile.net/proofs/artist/cc0d3c12-d20f-4d27-99c4-7221b382a888.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdcc2fcc05880f9aaa1bbd27069e50732ce0a932c3200c0248cefa48f4c2927. 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/QZVEM2399393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb888090431e3b161daa99d151f50d132c90e08863f54ea1c5bd36084a127bcd. 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/QZVEM2399394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2415fd3d09a5292fdf433314ba592d1a3856240c23d87c1267d6f668128a6da8. 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/QZVEM2399395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd283471cf88aa1e719f7da8b502b556f692d40ee5382282b099f2601dac0e81a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZVEM2399396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ea10ed939840f24d2e40155f1bc53c6bbe6dec418dc5fbd825cb9b946d0c2f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZVEM2399397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3c963b541cdc1eeef67fae8b42004dafaca17e1bd476a4cf62c303d897110e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZPEW2411175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd3d1f20cb51ad8082bea9981cbda99654f0ea08b669ecccbad621f9a68f96a. 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/TLVEM2404882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df0ecd9c570306b7c00fda44ce4113f6a6d983f65fc4398014dea72908c7cdd. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TLVEM2404884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa017e5fdc107ac6414d7880c166d0af2b271192395b1eb4ed86f2dd960de8eaa. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TLVEM2435393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63625c1aeaeec682a22741d2815e7b83f20a6ff323d6c84413619cb6f49598e. 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/TLVEM2435396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7563a4c20fa9100f6191dcd8fed7315f8b5c026568dd6fdc60169d7fd121b815. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TLVEM2435398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8445f4646fcdaeeb54251aad9d0f616c0cb3a2f875514967f837789f6f00354b. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/NL8RL2440438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6ae5f96e35c966def2b9a04f1f000e9ae29c8e8e3edfb1f92953aece7e2ed1. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/NL8RL2443040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60324d0f891fccb2b02f0cef81beb45e47a3fc57edee24c17a5457023dd93691. 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/NL8RL2447721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b77a1bd7ba507e149bb2d25c04dc7cbdf61ff89754efe3967dfd8b27384070. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/NL8RL2454835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70a35759573fef59184db861c380a8687c4687e7772b609b6f5c554c012290f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/NL8RL2454837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacc04fd8e1b5bd14e27c4694d923fd5f676be25011503bd0536159cc80c1c35. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/NL8RL2454840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3b8203fe598ea3ff79065b6ec200682e028c4f73f9593804468207d4170499. 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/NL8RL2454866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd6b0e8343ec440432f539c516b20c5464e6fda428e08c8a3a7a5a682f5b999. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/NL8RL2454869.