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 0xbce7cd10ad87fd447d98fd7e93287196811f5a740bf605b95fc86d5a03868eed. 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/323e15e9-7ef3-4f83-8fbf-44daada8b7b8.json and https://artists.proofprofile.net/proofs/artist/323e15e9-7ef3-4f83-8fbf-44daada8b7b8.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 0x847eb5a488765c0b255c112f4c82dbefa25687ed9936f5b11a6dbfafcde93396. 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/DEPI82439483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a508c942b8e376365c38ba7394c1943639c4d7382ef13de417f1091c93ac04. 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/DEPI82421365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1eec7d30952fd81c5702655c515a4f12f0f8857d79a73459fe7f6ffc1979988. 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/QZDA42435091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a6e46dba6bd103a4fd333204a22426a62e73f19dae0062e298a83553db5a0e. 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/DEPI82432463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c0425a3cd79028782472f5f7b972826ab74ec4cf978b4dfde200f71b3a555a. 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/DEPI82432464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729acf5dbce11dff2aa8a5649f6c91e7418ea5170ab23bc1b786933ddad8c5a2. 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/DEPI82432465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46f5db6cdf8c550c2ba7a865d6b3a7ecd55bde9b87dc44334469608e65f38d8. 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/DEPI82432466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b5f6853c7fa44e642fc7adedccc7a7cd9edfd2dd990307e567adcdaaae522f. 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/DEPI82432468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62697f891bef798d9f15dcd1e555ebfb4e124ae957a1caab1f4a5abcf3ea0c3. 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/DEPI82432467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dc1c0b79099fd66c2abd60042919d544ef6120006c9e2a775e89a51d60031a. 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/DEPI82432469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b15f23a7d75fcfc8c3e0253a3fa5bbc5e25193031d61dc93c5bd08405104972. 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/DEPI82432470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9942dcb0b242c5469f60ef8df6da69729fcfe5be95ab549f2df0b160e1a3e6. 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/DEPI82432471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f15a5f58e628c9fc4d22b437fdf41e3b39079b0e57503e286f327f42f1bd80. 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/DEPI82432472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1726806af7e603891c3d88d91ba8350566ca61031e19ceb0a13c3c06686be242. 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/QZDA42434996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40abfcb209e8d7dfc4dba4a7be73eb523477e4c11fbe8db5dc51b51e18dc16f. 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/DEPI82447062.