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 0x5fbf9c1943c4e3f52de0a0f3e0ed4824f8f89c428136822961ee9474c90f20a1. 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/cb8831cc-d05b-44dc-ace7-4f43e42690e5.json and https://artists.proofprofile.net/proofs/artist/cb8831cc-d05b-44dc-ace7-4f43e42690e5.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 0x4bea78392f8f85f793e4ff03a0abf394f7ddd4496f3a7548a6188bce4daa8846. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZTAW2533268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64aa36cb9c7e3021f6c771134fa3787177a1851c34c3c058f1928290b57663b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWS2599738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec701c507f116b531fd1e70f6ac4aa5e00c3e111599050736da797e3720dbdae. 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/QZDQH2508960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262d9a78538e65fe86aa56d3353585c8f52d61444f82f66b793bb2813633bf09. 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/QZK6H2545812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f519353a16ce18776481a4971527abd16af3d9a0ca860ecc1f24c005f87489. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2546316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee12e6b2a824cc4012aa0adddbb47cc3e41df885833364abfe3fb57ca3f10c03. 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/QZHNB2541953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d370d03946c3eb1a204dbe13010d18ddf39130dc3163dd9b49a2d54809e793e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT3EY2465072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49e7eff52b38a2e41f3285d1cddee1de99e05939fa1947966ddfcc2745a5b9b. 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/QZZEB2493648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdb2e9abee44c307ffa036f5dae6f3e852dabb93d39b36ef31c0e2143834a33. 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/QZTPX2460662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaaf40df9fa5d2122e2ab9f6077cdf64752a1f2237c7204de1adcefc2ffd886. 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/QZWFE2407059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871544370aec3f392cfe91dd7549ae8b616d46b120297d693852a9b15cf5e933. 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/QZTB82419773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c8db36d44d7a7e8775d3b4c75dd0bc436b3fe38edcd5a5779c2ffa630da9d1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZRP42485945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0909922d4c0b0fde5ab0d87fb90c0c901c1d4e56d0737d7649ec776cd51070. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZES72418953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb1b28e812b38aa5494416c2171f86e9ccbba5c8801c26263c96c5647e3f4a7. 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/QZWFL2399921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6fa0116a0bc32257b942750ee5698eaaeee6b77a4cc3e170f8e7e55118d03c. 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/QZTAZ2387948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa054faefdc73abeb14d1b3eacee966bb9d38fcc1de8959fc951a5f68a8d0faa5. 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/QZTAZ2313477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd2d988fff36b86b0fc7a780386f30b843adbf6952a22f8b7238aaa50f7e624. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:06:45Z), 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/QZTAW2358347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658052dfe0a1820bc68bb35e73cd020c0c813ac0b8ab52cd1fe2c50ae9e271d3. 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/QZTAU2321413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2d4b4c7fd60af03a924642f38b6596e95b8352143c39609b4ca99a32518ba3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNWT2341572.