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 0x1ad819a737b59b850e1de5a1ca69e57c507cdfbaa032046786007c44b75229d1. 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/3d8880bd-1467-4adc-a4ca-b22e28b6965d.json and https://artists.proofprofile.net/proofs/artist/3d8880bd-1467-4adc-a4ca-b22e28b6965d.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 0x5c1c8e231512cbeff64d420b41871d9c9bbf98f7ccfbd23be995573197d2fb51. 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/QZTB62265287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cab47b91ba9cdfaf736d06b4af121daac34cbf917e13ba8f9fa46b2434ee23. 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/QZES62485385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7cc5beebdf160b8613b44baeb5b64a4c1e1e30ce4d5130a053946f30434796. 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/QZFYY2357752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8aaa1f2a4f20eb5c1a7b314bcff6f684a2d8abdabc9f8171f408f2433bf8c3. 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/QZK6L2275764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c161886a858eb9b17925aebd221f56b58383b844f73b0f0bb63f0422919fb9. 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/QZK6L2275765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b80985f337c97a034aff2a387f8c7bfc98c2e4901b87e8e8ac807e4c202273. 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/QZK6L2275766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784ff0ab751a84597ae97c99dd0d3c937cdb1e07da66b01a63546424f34a5bbc. 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/QZNWQ2419219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588878f3ce2fe14c9409360ce070aa9730aef675138770476855c6a2364a97e9. 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/QZK6J2497134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d420fc26349349c48bd63e1739b8be23ae6153244464482c612cea6d221d0d. 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/QZWFK2334634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f9aa816b72d4bbd5e70b938a080bdc0f71425569d71e1799924eef86cc22f9. 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/QZES72411723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d7a137fc3704a42126aa8a2e683db401fad0d731b3b2edd573548af77deebc. 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/QZWFK2380683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0049aa9633b9d0326d6209e5be9325a0ce7a60501636d8f403c97886c19044. 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/QZK6L2351803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cb52227ee7b4116ff1dae93ca938f7400a24449387cf834c9fb70184e63124. 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/QZK6J2340213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503fa17b29d6e0ec526d517de2f57e5edb0e3a163d0a862ba604de32a411cb2e. 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/QZTAU2217771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc566fd5c28f2058090a69e5e8efbb6ef054411f945c2a462fcb09f8714f483d. 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/QZNWV2284725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf558baf19b22fedda8df6176c01369b6e2c8461b0bbd36094fa888d27a5041f. 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/QZK6J2061629.