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 0x8a41f9a4c7f2e4736919c911b766735a16ac07db33d65e0b5deb07640e9e894d. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b191c09-cefd-410d-ba11-96a3075cc679.json and https://artists.proofprofile.net/proofs/artist/7b191c09-cefd-410d-ba11-96a3075cc679.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 0xe35ca38e7eb86eb55bc417b66197532b9a4c799c633318f0f73eb59760777536. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU1767484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e8e2a04407d3b2b62d67e40fb5fcd30e12fb66ba2430a4bb6bf2b2cb2d1bf4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU1767486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22206bd4bc38ed9fa64aea655898c706238829f9663f4d41d477ee264b61d5c1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBKQU1767489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a753517a075bd7542e8e65be438b8e709854f9223454ff41fe6e8c337c1701. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLD911902145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bf76da841f45569770d377ffeb200286dcb4c09110ad02b0349a151025c9f5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLD911902147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a7a1fe0ec4f7d767cb3fa7f2a0b81e1debccfd118316391fec741ced556032. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLD911902148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e9403df0b1cb9adf0d472ab9e2d1f81f0b66e2973316e12316cfe109ed0329. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLD911902150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59345f247d2e5a0dde4d012b74928ecb6fc47fcd0cab40a6e07a7a40e2d55f98. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLD911902152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bcdee2a5260ef0abfe5db8768a84ceed3981ccbe1bb0534de6d68ec34aeb9c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLD911800135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b718a11d14a59aa749ae741e6c5f5bc7c89dfcc448eb2dab43a7e3e40a6f515. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLD911800136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac737a5ecdb9cf908b71242106ea209f3e746acd6fe43634599b489086d5850. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLD911800139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521d4b61d686694e0d2d5dc645ed3faa145ca20b400f65510a897866eaceecd4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLD911800141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c55fb2333806cdefaccea74b805036f1ff8e5fccb360da8f58ccf418331267. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLD911800142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6780eda55d1bde2b93bca8d99a5eb02adbcf8f35b3efa8211ab5b0eb9d55e5ff. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLD911800144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f504861cd16ad38e664112c36885706890d0d98050f1547a2844b2c5fdff47d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBSMU2278770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8510516856e194247523713127fbe05e93a66a77a2d6e618d7c5aae8307e55f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU2278774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c660c1a791b9d10208d3c548edb2f7b526b09c86f33841cad1d0328d897a41. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU2278775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3337be93e469dd942d6dbef4ff15d650b39a24884b70aea0d9be9e371fc3d6d1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBSMU2278776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca18900aebfc639882d11229f21d7a664595044717d68218bad4f7db88acb3ca. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBSMU2278777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dde45884c791872c9e0a69888ac31447f9a61631d6d85dff08e31e8c8d0c6b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBSMU2278778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f14318a733965b18a4210739be77504bd92a921abca976c032005a24aee91d6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBSMU2278773.
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 0x1671d9325dff712db3049029172c09f0ff44b678f3be66357ab3d09a51bb1c62. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBLV61920582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58014593b0e9815d347b2c512b9ae386de9d46389775276e5eb6a342b40c95cc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLV61920587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cc57dbc57fed6433732218305418c741232af43eb6b4fdf9da8e23f2f5994a. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/GBKQU2145245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b9cee9b19ea7019af75cd5e514c820835ae3ec53f463b7c320c2b2fc115e46. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU1915428.