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 0x02266ecdd782b658dd12cd40041a2c170e4a4f6a05d8cf7cf0304721cabf1716. 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/2ca68ae6-d164-40c3-b81b-c1ef2be46327.json and https://artists.proofprofile.net/proofs/artist/2ca68ae6-d164-40c3-b81b-c1ef2be46327.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 0x3f6569cb03d762d091264ccea16c7771231bcf25342955095506826258445eaa. 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/DEA372009403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014ce1ec014a826b17598a4888f8cc7e201c19bd177774970a65163fbbcd1b28. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:31:55Z), 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/DEA372011148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a988fe5f00d918e26b6453f958cdbb707f4b8f74dae3759053889f1494b176. 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/DEA372009419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6898b09b6ecf0437b3d248eca5328a7e09dc1459619f71cfe0cc28ac26e92124. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/EEUL32206072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa902a853bd29e916df0f8ff47f242680d5a6a4ff199b3ae100f9265a199611f6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEA372009416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a77457e950db328b37760a197cc146c5ac96312655f9a66de6f7e059c426b4. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEA372009412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f560a8352929ef7b9111db2fb39ac67aa6d980c05161732c9345922846feef9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:53:39Z), 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/EEUL32208961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25d6c3c6e0b26ce561144a992dcc273d28bbdde3b906a2b4908717311627808. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/EEUL32209278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25e6835ec0c157712a3e27bc2855c069c2f4be351bb3a49bd7f085ef8b9de6b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/EEUL32401204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe752e878ca14320c50500f445885a3ab9edfb9666f675b0ff4018139cbb98f92. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/EEUL32402379.