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 0x7f63220e3e0bf8c7dd8bc29bdc4624f2e27679bb5702828d329468461908c48d. 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/3e6f01cf-07a2-4783-8a8a-701e754f7a3f.json and https://artists.proofprofile.net/proofs/artist/3e6f01cf-07a2-4783-8a8a-701e754f7a3f.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 0x4c37ff67d0f0aa0b062aca29bcebced84ff017f2bc4b6ed15370b01ae13dc66c. 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/BC0UT2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d3c1b372079ddb2c6c444d39ea9c797a21458e07873a1fc3d75c820dd680d8. 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/BC0UT2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7846080a653a6c6d4e44a92d3449958c93d19c6fb627ce0f8a1da2f210f1c798. 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/BC0UT2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd5a9c1574ec9a5d1eaa9c6021bf0b002e907de246924475c43a803ee2966f6. 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/BC0UT2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bdc500d8eadf213f16b9e83b3c3e3b764f82cbec85e7b96d4c19df16790b4b. 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/BKG5L2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29eda443bd032a3a08549f8c323ddbdab9cbac8182869d810b208da64914120a. 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/QZNJW2382739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afbfd8353ee8d23eb575dbc6241872a963a051985692ab26aaad1c876822675. 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/BC0UT2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b33eccecaa46a296289dc29fbd42610924c37537836489983988533974054a. 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/BC0UT2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211a0f681c0ee5c2d991e3477c9cbfa8f9ec14046eec875ce0807ddce8bba6a1. 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/BC0UT2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d7ee44ab0c45c9802acb1882314a7c700586a156a7c7bba0b7715fe23c5e9d. 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/BC0UT2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb265b39faa13a0c1b497662506ef703fac002ab73a301dcac092c0b10d182b95. 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/BC0UT2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c08b5d44793382e27d822418f5eca8ae48986b359a9aa50cf0a76cd838bdf1. 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/BC0UT2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b785bac14c7b0c0ec8d3b5348eb1f6969677dafb72d59da08569b06eb0d896. 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/BC0UT2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb75826fbf7ab56b6e34a9efefd7ea02d12121caecf1847adb741eb0531d9273. 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/BC0UT2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bb120c65afa00df48b886081e6b65c9a6495b1da17dedf680b2f8f5c61a5d0. 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/BC0UT2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23515efef145596b5bd51acada9f57a0b366f16fb657addb0c79134dc328933c. 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/BC0UT2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b58d1f329ef9051d82e1981eb3f2f28f289a2f5bdff236aabeef0e82de79479. 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/BC0UT2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8181615f2cac6d600f08d04cd375747b7232ea1af7e4ef82a5567986685dcb53. 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/BC0UT2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b42e7db70af1e33bb99eff05869dd70c036f6ca5d0e272fad7217fe7a95b44. 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/BC0UT2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd31c78f66a369189253bc81b773f2733b84ca72977a61ae0511bc7434ab16a. 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/BC0UT2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ccf17a5b35aaa9d2fc76b9c54030c35276a353ac9154eb21f22db59e0f5471. 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/BC0UT2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f9d4d57b0bd43b332507504fd38a4f28a49d2685e29a8335dade03dd5776f0. 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/BC0UT2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051841bc7806431f27431e63775d6b1a0bfe785aa6244b2bb6c54deb64803ba6. 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/BC0UT2200010.