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 0xc3006c7a570e836fdddff32f5f5612a0230ad5bbc99ecf7116131e984d35f6e5. 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/ecbd2ce2-54ad-4b6b-8e42-082a207021fd.json and https://artists.proofprofile.net/proofs/artist/ecbd2ce2-54ad-4b6b-8e42-082a207021fd.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 0xc507f1516600a926a97fe15fd5b111a2f7b42fbc66a6c871c72806936721658f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES7350602016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c90d68e4a3ea5721e2e87bd56adf38136c32cd56ee5e49520f8eb4dfc81797. 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/ES7350602017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6fe5128757113ef85038aa6c50b241aa5bd7fc437ee7c7e777dfec7f228363. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES7350602018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477c1f388e74a325928a5a757467518efad971128d13953d07f699ac0b23dcdf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES7350602019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde2c7ddc3ed6907d3fd59eb95c2bc1f86f566f390ca731e2d1e537563083683. 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/ES7350602020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18573243aebcfa091a44b9638490143e50b083d060a068b680db8563fcdb83f2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES7350602021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e51cabb268e51092e6b8d42a9517583f03845086134554848d846cca3a45c05. 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/ES7350602022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3b3b9a34132609350fc268c59e0cb1e99a2f6363135fc7850282cfa8fb263e. 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/ES7350602023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e084f311c14e3ed70e78ab613b975f60cf9b432edf580b4d0466fb90084f9cc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES7350602024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1640b24c3bfea414d00cc2698d2120f9ff300ad33b4140e35e601ce663d6cfd3. 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/ES7350602025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032bc3d157564c3e92384bb51a49470a5cab6e9562b027763225a5ba7f214e06. 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/ES7350602026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cfdd3e13676dbc84b3c3a9a2ae1e120a474dc5bbe96f82580d3c56f10a38fd. 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/ES7350602027.