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 0x794c1c5aea277faf3f0c4fdd6d6e44098c5d6f2d531a7839f09978d157286dd8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f95d2e21-adfd-40dd-96e8-c66c9cd765db.json and https://artists.proofprofile.net/proofs/artist/f95d2e21-adfd-40dd-96e8-c66c9cd765db.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 0x2b076494bfb8e64df5630a7a5feee9b15641dafdec3b22fb0445f52bcf026373. 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/QZK6G2310551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef5f6436ccf8ddd45ae0f08b4528915ce597d5a30cb5f44a14a0ef9aeac7c5e. 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/USLZJ2447716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f2d89200ac76ccabedff6a68130ea0b550ca6275ed726b8c6fc4f4642f7f24. 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/QZNJX2159815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc10ebb1fc6958c569637d085104e57bed75bd8b59c9aba0c354c813abcbdb1d. 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/QZTBC2313685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6586576c3750d7155f917d13b5bd229d5ef476dc0381b15128c797453ab83d6f. 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/QZGLS2454477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c5d1ce6d63fe3835a335dd71f731c8a1df1277b276177fecdb1ab093c5d98c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJZ2355296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc9ea016b39b5478a07a459ed9e02ebb1c37795871cc53421847c4afe79d622. 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/BC8Y92400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c8f0659f9792e9ad3d212c621233a7c85ea423d021cfb3e73504550a00eda3. 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/QZTB92339596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770fcd7a4428dbe5608ef2a1dc3e4aa836df57994f266388416ff8ae45a25fb1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAU2341998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffc8e4c7031c637dc45da47ffead8e6958cefc8a8007099ce8d5fef02c26460. 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/BC2GV2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffc8e4c7031c637dc45da47ffead8e6958cefc8a8007099ce8d5fef02c26460. 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/BC2GV2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7dcad1dca0f5a3a302c3a42419ec5feddb4583fd80c29a00a5bafd9df570ecb. 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/QZWDD2386627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12641a793f46e1f93dfebd38b24dc50598d80b582d5c31983fc68456f23e140b. 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/BKLL22400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12641a793f46e1f93dfebd38b24dc50598d80b582d5c31983fc68456f23e140b. 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/BKLL22400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf54982467ef7a3aec1fa060fb14801ed1d67b82eba0e3a89c8fe04f78933901. 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/BXIV82329338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7dcad1dca0f5a3a302c3a42419ec5feddb4583fd80c29a00a5bafd9df570ecb. 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/QZWDD2386627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68f4f2bbeea0927582ce84a83f7491d4aae03e04f0092a5a991ee044880b0ac. 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/QZTAX2466872.