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 0xf806a7cd3a8d1e8a71656ea92277074d083c0fea2abdb13d63b4c10d996784e5. 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/dfb32cc4-4096-47d7-81d9-c77eb1c33ef2.json and https://artists.proofprofile.net/proofs/artist/dfb32cc4-4096-47d7-81d9-c77eb1c33ef2.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 0xa69873495cc895b7d8394450c555ccad52c2001affece75c464a9d10135ca83f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CH0831600610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79670de05b5589fe042394f2108e4c220b4ce8bc7c55b60f4f4d2a13a6260f3. 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/CH0831600640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1796d680d4789bc1e27195ce33e2197c9f359200a867e5ee8682d395a27e041. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/CH0831600680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54be7517796e134c7a2243cba068b9b21c86bf9825ab68c8b937176b4639890f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CH0831801410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b19e2ec0a5081c0500130c0587bb304cce6a3caf10d76a2d14221168f3df5f. 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/CH0831801420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb2b1b4f40f76c1ac7058b435f7de7449bfdb9b6b55fc3aae4c47348c3c1867. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:05:59Z), 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/CH0831801450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13d37b0dc7e03782de268cd392a91e036121702f30bfe911326e4d6307c30a2. 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/CH7812190965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd574a739338be152bd82e3502ad361fd9362ce27de44ac60a8038fb19f61ae7a. 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/CH7812104832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c01d7a22d1065cd92dc6e0bfc618a783fb3f5c3c5c0b36098cee05de4656ec. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH7812188956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c710004fdcc346c554fad478c44c690f4ea3bbdaceff971ffde30901039d52. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:04:19Z), 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/CH7812104837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac79482f2ec4a0886c473f4e39f57988ea11feb6ffa5b75d96c86ad137dddcfb. 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/CH7812223607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c8a712423bcbb9f8d4276f1e3e3339ef54562a759b4545db0cbd2b913e5ea5. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/CH7812369497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9460b0f8090b84eee8e8a7f3e16fb8d9a6edfb387e13b80b60151a0d0aebc751. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/CH7812409085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099fefdb6d08868da8e0d8bb75675be192a143088c795c2a041c384b915d30e4. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:41:44Z), 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/CH7812409086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66536ef406548d53a0234f4a64dad7f562e218cff1d5618751e448a35d096b0. 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/CH7812409087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57450ef6ce26fdad58deaff8a4f34cf214519c56873e700baff4704e23a9b8a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CH7812409089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1bcaca3cff543bb162b3a37eb3dec1a9b2b1c9082a39b1d4b0b7fc22a1d9ed. 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/CH7812529488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0657d82744aad2bf6336e4b1288f478030ba19131a49e791fa4f3458ec1415. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/CHF032508167.