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 0x0f47da1cb93abc224f8e59d33c772c016273cb119566f7ea625ccc4700b12e1b. 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/4e25f74f-8343-4530-a65b-e23b5b585ee9.json and https://artists.proofprofile.net/proofs/artist/4e25f74f-8343-4530-a65b-e23b5b585ee9.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 0x26ff18c02ec7057c651f6491a38d3e2596db3b921ffd913a947ab072d7be874a. 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/CA5KR1817521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fbc46d8dfa853cac21083059e8a889b223c414cb96d8163b32c9fa7fbd509f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DK9H51801201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014cb96074b77de645d65501b203955533d25149e7ad0e30ccb7e2217e23af13. 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/CA6D22100835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc339ca9429420f722084ba89c36a58b1627ac3968fbde54ea0dcf3ebd6e4f432. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DK9H52300403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac5f6a06c9658fa156211a8ceee31506bfdf4c2fb6447eddb7f60e8ee15a13a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD2320368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28075ae7500d4bf2fd9aed60f57cd48eedee2461aeb619bc8211f391574ca42e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLRD52355110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135b8633bc1898fbfc4b820edb1e1e3820e28e1f9dfae2ef8c283b636553b623. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/NLCK42403386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8a87369ae6b0e9cc0d7509916527529a0896b5fff177168f82c69087e17cf1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CA6D22400455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe865e27c4a1dbe1304f9bf90950173a7625716dd330b4eab5b611d370d768aa7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLCK42416340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ff18c02ec7057c651f6491a38d3e2596db3b921ffd913a947ab072d7be874a. 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/CA5KR1817521.
Welcome To The Club - More Plastic Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe56251f809019e6f19e5ff51641c005557a864d81d34a948cfd9aebc384afe7. 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/QZS662292222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b767e8626b25a432b5e67d36c6964dd6176fcb9d67d08b93454382cf47ee3d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA6D22100757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9ab5eedf6ac49df6a186736f92f409792b3b98493ecc305751d1c59f29652d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA6D22100725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc4f3cc12a48b037e1984d05206d24d410df13da7c44fc25151028f491678e3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA6D22000298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6437ff27839d142c569c562e0d7b34c4c99e94344672c9be9e1f9f105cf374. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA6D22000299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9ab5eedf6ac49df6a186736f92f409792b3b98493ecc305751d1c59f29652d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CA6D22100725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2850be4828535ac82da22b7e838d56f1718e7cdb7402d93c47c172b1240eaf. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CA6D22000474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc4f3cc12a48b037e1984d05206d24d410df13da7c44fc25151028f491678e3. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/CA6D22000298.