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 0x4ee18fc836135ca6cdb06b4fb583d054ebdfcaba995b37707f07ee2f1a79accd. 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/1b6f4d21-cc1f-4c0c-b29d-e80b3089b802.json and https://artists.proofprofile.net/proofs/artist/1b6f4d21-cc1f-4c0c-b29d-e80b3089b802.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 0x093068b01de3bfce2556f279506694c3fd99851fe7c5e21edd1edb5b0dc99499. 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/ESA011782921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc3013438e49da0446f9bdd87bf04ee30faa658a4cc334280dcb38b031cfe8b. 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/ESA011782916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c00732da619418e73bfc9b5737f12919928420005fa84c0915f3ad9e772dc91. 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/ESA011782917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061ea77d34473e2a5c68770f27f9f5c75975342099790b51ddbfc284d676b3f9. 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/ESA011782918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2676d0539ffb0ca48f9b6cc5ef26d2ae9c50b832381730cf0939f8fe295a90. 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/ESA011782919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d24e57bb2817a279488aab936ee231a5be315bbc4aeac9186584507d2e18da. 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/ESA011782920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fab48e172bc4ea06e074d9e7270eb7a9ac88c531b0bdf70d66c8d2eb6f9f6a8. 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/ESA011782922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cb4c5d27882d136bc74b7800d5ac367db38fd3cc9077a5f08317a6ea9a3189. 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/ESA011782923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292f86a225b1b5e3e0111bcf9b8ee56b1d49580c63b3f7866c54d7f00df0b4a2. 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/ESA011782924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8640e49718f0243f72d2fd05ea2d8a546388eb11a46e9753f7a948b0ce62c77c. 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/ESA011782925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc6a04df50f9944ed3c7934789da820e648e7d8acc41404c51d3b17da47aee0. 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/ESA011782926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b359128cb5950c7baa1ed744c02360c8071699e40dc7f593446961c0372936b. 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/ESA011782927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a461e4a07f924eb74fec5bfd39a1b0fd5986029d1f27de104979a42110b0cc. 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/ESA011782928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45564f5edeb267b3b75bce625f7caaabd4ab39bc623e44d5b329b2a780b4ce6. 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/ESA011782929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ded0dcb6144ca6a4db2ecc49e83325799c27d2e752b829edec196e09d73eb8. 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/ESA011782930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a688a8561d2e06374d8ba539fefc77d29e8731461436b344a463ab7c17fd89. 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/ESA011782931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760bedb25c0fba42c3e5cca3aa1792de7d68059c486bd21a43b67ad6fa2764dc. 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/ESA011782932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7532a7f491fae2a6e675122bab0c16cb5410b24d87fdfa2c1ad2f7c43adbbf5. 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/ESA011782933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7994e0b85efe3b63163de473ff0b7ace5e2b6d008ac53d9ca7c582ce94d1f7e. 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/ESA011782934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84e0e982b17dc3875265b745a38f7725f49b349128ceb556871691d08a5b4b1. 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/ESA011782935.