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 0xf6064fb86e21635441c572feaa9e372024f5f45a00021338b2f3268d297ae0e1. 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/ff429c21-8066-4759-8eaa-5e8ef435cea3.json and https://artists.proofprofile.net/proofs/artist/ff429c21-8066-4759-8eaa-5e8ef435cea3.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 0xa10ed22fa97397331e33c9245902402aa8a73a0d4e3a5248f23a256c3cfce109. 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/TCACO1645378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1371e3d374b4871767f10770280fbcdddf05d7aadcbc4f8f3f8590773914869c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:32:08Z), 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/TCACO1645388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbccb597eef2b0ec24379453bdd41495ff51f87221d95adb4711aac7c05f0e1. 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/TCACO1645390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce7795a8d9cdd701619fb7cf99815e5794305660e24d5c51556c8e928f7bc85. 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/TCACO1645395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe72322be6441a4ab3e5e95ad37cf2a7ff8d371786c457439454799630568c47. 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/TCACO1645398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534572302bb05732c3a199bd28c5f674bf802c1cd9b22de5457bb5493122e3b4. 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/TCACO1645400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb914998a736f26a5a8c62bf2ff2bf7dcca66903a4171b5fa8559616bc92251e. 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/TCACO1645404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebff19762c758ece22123dc9a67d05bb8c7697770f482ef17db074673e0b27eb. 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/TCACO1645408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037d6b386c464f6384f3da2bf72da43658a6cce5383f332799f60ce43e40893d. 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/GB8KE1651779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493b65ba7eec295814ce9ddf3268a2f6dfcfa28c2e20010ddb252aaa3449aec5. 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/GB8KE1853212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ce975f12aa034d24b3b97c9a0b60b228fbf2f2544807a7e855b0c0e08e96bf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM6DC2088286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc10a7ad3716a7f07f93490471d5004ea872c386219973ae9f66aea6fbad89ab. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ATEK02142009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224c7ca74a7f5eb0162286f95766d841fda7adacec8ca9061b8429fc235d679b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/LTA401600011.