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 0x6cf8620df09263dea569d5d511f9a63f317f0db0b7bec9457897030c07634ec1. 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/eea37e49-7528-41dc-9468-98d16643009a.json and https://artists.proofprofile.net/proofs/artist/eea37e49-7528-41dc-9468-98d16643009a.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 0xf3cf858dec8d75a0dea8046c16e53efb5799b2e0d9a42008aa11de74d2e14bba. 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/USUYG1507021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd607f0d136f8c79a9c1c9e1c9a5edd55adafb58360b478fe430c33e5de7c92f2. 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/USUYG1536580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9656912f3bb09315712e9546f0bc3ed907584f8409bebed76dfec0c0086677. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUYG1536584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c000757dd8a11b04a81bbd50b3a0d81828ab77d61606eb2ee1a35341e4af4bb. 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/TCAGW2397330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71d9e5713084c47bb592234af1b26b6abf15c37061918bfdcc32f18d066e43a. 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/USUYG1463902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f364441323060e7fab6402a42f5a3b72a0f5835a36409b9ef79ffd7ade522c. 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/USUYG1448230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8a640873b72410ba7bc3349095d169146c0106eee2fd48fd682e092f01474d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUYG1541704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9108dbed3609fdc7604893d8a1b3d11d9d62f5d2e62677ecebe7e0cf5a4f2db. 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/USUYG1463595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f364441323060e7fab6402a42f5a3b72a0f5835a36409b9ef79ffd7ade522c. 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/USUYG1448230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6beb3e5ae11d9dbc6603870a4ed3cefccfe75e91b0c86b30a1d8c6a0fc757222. 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/TCAGH2262061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83722fef896f85ae02ab934dca83470edd878ca3af4c37308b214b1f88a6df48. 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/USUYG1512168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2b027adf65768d15e76888969792678ad4f30d746953ca0782d474aaf0dfdc. 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/USUYG1512169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787361abb3d8fc601ffa1644e5d8ff08017cdec36f6292ba8369dd986799016f. 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/USUYG1512170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae59b4a02bcec68c2e9445478c463d4a1b6cd89bd344d6920b7d541a668c6ef8. 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/USUYG1512171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f101ed924173f476f793efd4dff270993a13bf9c4d5cb1a435548233ea9602a. 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/USUYG1512172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cf7cc78b0122010233ca141baa869c4cc61f17d232402159ce453d5d690d4a. 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/USUYG1466331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1063d43e08bec1464e5d5ee251deb54981040853bfefbb0d30a28b6f820e8c80. 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/USUYG1512174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21c991ca361667e9780bba14b6c67bbd6773d9f2e8341d521d402bd0e45ceef. 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/USUYG1512175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4564a847f5967d5e6337615851ad982b4766c5805f06b04350930105a9c8bd13. 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/USUYG1512176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dc173b9234fb5524a3c6a3441e78a51258749d1eb61ebe8d63937b02ba95a9. 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/USUYG1509438.