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 0xb1bdef1f645b9a856847eab66172c264b6d8aae9ca09572cf13e29bdd0ac1b83. 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/74d6102c-ee5c-4ca2-b97e-047cca99ba37.json and https://artists.proofprofile.net/proofs/artist/74d6102c-ee5c-4ca2-b97e-047cca99ba37.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 0x9cfcdb7d368152c97925e1f5aecebf4400f32a8d90e6fbd396140600e9ec7b3b. 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/QZPLR2287750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318b7f23f0904eb4f2a4a423e81ae97f262b358e9075e2fa819d3358620d1e35. 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/QZNWX2195766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b56d47f498c2a823c269bf39760d5733a39728de845823e643f31ba04df5a36. 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/QZNWT2109046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9eda0772967e9e258bf9628c237a3ef3a5aa341168eafdd42c1c0c752cf5e1. 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/QZMER2158356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776d29f297d90cb0dd3c2591f6589a77fc81dda168270d0f8b77ee5b4eaec114. 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/QZK6F2155020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652fec99df2ae5cf84b216b3aba6c2f5bd2941476e828143d2fe231631e8d457. 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/QZHN82147752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafeb83260a3b460ab2c5ad6d71e3bbd1ffa603a312dee58c90b273d5f661862d. 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/QZFZ42108181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd123e9b5c24a2d6d0f240d9e9235d201dcb87ec1250a449ef7a2b8fcd0a5bbc8. 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/QZPLR2027413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d88f3ae0ba65313c98f8a4355d75c8878931806eaae185c9239f3883fd26c67. 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/QZNWW2005247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5baf7a486dac8764ae477055f4726843c7e41d3c407a6f34d066173b8fd64d3. 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/QZMER2014939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17abf057ae425c1af68e2f3d8338fef1474a886341f44899ad84e17eacd0ec42. 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/QZK6Q2091378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a993f27d5d1f36fe84ada091ed86694e1cf4d8961020cc19d05798ff55d8b8. 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/QZHN62020152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5f8eabb5604cda88e807c55778a747ef49060469961750d5126efe6e13efd9. 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/QZES72058945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce01c16ca93b98169e882f04b643b00a5991deee7e143451214961d70f82e545. 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/QZDA81979944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5441655d84d62eca66924758de306c2376bb6042c6792c3acf52cb27273bc13. 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/QZ4JJ1993253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ed3fce29f24355aa0dc3064da732b9b6396536d3799f1b98c9334a368b69aa. 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/QZES71815549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5054d05143a056f9830cd8fe653d996c09b1e47d37f534f041b9c2480f2118b5. 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/QZES51806851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbe44162d33670bc0d2de9e7db8e521b362959297735a9ae160a81f29312af7. 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/QMPKX1812921.