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 0x32538f97dc13d56b5695b137e871dde9e0e93e9dbc95b35cdeeb893150385888. 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/f50ad6d9-e676-4eec-ad71-7ee86d53bcc9.json and https://artists.proofprofile.net/proofs/artist/f50ad6d9-e676-4eec-ad71-7ee86d53bcc9.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 0x8e82e7d16a4828635b2e019334c02d9f8cf08dc538e72a3b309112638cedfd7d. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/HUB871400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf530c1b91003210389565abdd3108ffdeea0336aa58d8aa23f9be9817ce3d5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/HUB871400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47ec211149418f9767bb015da6490ef8cc597abf2c3269951de1a1e277b5375. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:12:18Z), 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/HUB871400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd610bac2c8d285182b8db108a375431e2db5c8cd2246df385c00f2db88462ca7. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/HUB871400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd733c8e718cad2dd20c76088b89fbe92f8227915e4c2c8c88879a7a77bb43c15. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/HUB741869201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904e6b409e5bf506172cd0d093d97dc035733a602e80db0acf3e18076ff4a4cc. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/HUB741869202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9f46d1e086ebc47107153c295b13a56ce7a72dc515c156aa2e1583b7ae2750. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/HUB741869203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ee7fe901c389718baa247f80d3d581a90dd75bede3698e9d3ac60314f0d78e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:07:52Z), 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/HUB741869205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e75662d47a4083c626992685e4e09149c7c8ca79ca8802083120b6ac2fbe17. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/HUB741869206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066cdf9b65567af3bca33561f26c233a94ff009c47c4690aa8af1e3126590a37. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/HUB741869207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d359c0a8b246459d160a3e1677b7bbff9bcf1497b8370b926851212d8918803. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:37:47Z), 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/HUB741869210.