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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d71f702cb10c8b79a1a270c8a44814841bef6df397916cd37aaa4d0982c3aa7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbe2fd5a-fd4a-47b6-ac1b-ea9a3526ec37.json and https://artists.proofprofile.net/proofs/artist/fbe2fd5a-fd4a-47b6-ac1b-ea9a3526ec37.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce7d82f9bc434f3403ba12f7214983d98bfcc1ffd4bcb2c8fd3ba17f45bdff8. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:06:19Z), 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/GBKPL1965147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7867ea61d243e95e119abc0b18c0fc2b1a0dfc1abd18df91d3b0be5fd2c94a62. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBKPL1965167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d88975f5ca2c2e4308698f1d125f3cf3fb124eab1849b6cd1fc9d4b4bef801. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/GBKPL1965173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15083a6a50c18e8fa3fb4fd348f70ffced50e9c9846050666be16408d9dbf35c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBKPL1965174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc71f3ad7e3e9c32a0d696455567757c8713b6c3dab945453af139b0fde8c48. 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/GBKPL1965180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547aa91d2c6c3af8f477d76bca43fff669a5d44d040e87e4998e1079fe342e56. Chain 2 (Bitcoin): anchored in block 957622 (2026-07-11T22:55:42Z), 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/GBKPL1965187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2162ae461dc9d5e0cd8b4217a76be425dd9b8af861c082db6f8685c31bf3afcf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKPL1965203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7502a3185f4bdef6cb682c0651d0e4724cf037efa12c107449afeab1ada7a6. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:01:02Z), 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/GBKPL1965210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76819bfcf9d7c934e53001e6b1d99fa36bb348b8e90b3064e26d7a83bfdfa000. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GBKPL1965238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb37ab2041772f29781fe9da3dfd6d66c1bf92753ea3299cdb0e9e88b842b0b6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBKPL1965214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9367360c2f9aa284bcbffd1ab6a49c252e6debde25f5f5381c3dfa7ca75a31. 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/GBKPL1965273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76819bfcf9d7c934e53001e6b1d99fa36bb348b8e90b3064e26d7a83bfdfa000. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/GBKPL1965238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29364c3f30bca634584bc25d290c86a4e52bf55f68d560c78522dd63d0c0bed7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GBKPL1965276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bc999c9f8848951fb8f867e44786457e1190b2637ff90f461d4e9e55dc1d28. 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/GBKPL1965277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a84e7f1d0f7f5d7ebb15a246a9e6095761175217f1598ca0a3a5a851ebf8a3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBKPL1965278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e8abe20b0a8b7039ac231ec882d50fb265a47738b2f5fb66774b258014a3d8. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/GBKPL1965280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b60895cc4c2bc9ca16a8b6f52caa31464eb2c98eb53e88ee1eac37ace9c66a2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBKPL1965246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f22e867d7dc82c2c0279e90090cc96194c5cffff8eb9aca42996d958030f3f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:43:08Z), 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/GBKPL1965281.