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 0x144c56b17733cca821a10ddff4c7fa61b837b1d2389ba44548d955e22cf36b7f. 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/7b9e2050-1f4f-4c1e-846e-1362f123c71b.json and https://artists.proofprofile.net/proofs/artist/7b9e2050-1f4f-4c1e-846e-1362f123c71b.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 0xbc34df5acb5b4c84bec99ef8a48d09c73c737ed1b43d2a2cfd7799560d2dd95f. 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/QZFYZ2001769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba5cc5b09eb0906ddf313829e7ccfe997eaf10b20afdae9aef76eb6e41fe306. 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/QZFYZ2001770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe25aae0706e3ee31986f4b8303d285d08c0598edc2a4cf7fbddad5997a981b2. 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/QZFYZ2001771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601b8d31eb37ac6ee994fb9c5b41e129e57f48d691aeaab413f15b6159a75181. 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/QZFYZ2001772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6803f478c321c3761ea3b7094508aaa00db2f3aed9f9d5ebe519950cc737f52d. 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/QZGWW1951579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17b3debb04de61307060d8a79b8152c433eb758965ec11183fd4c22ac6abc10. 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/QZFYZ2001773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96875629b20802b4348d470bb8239231e2440d36f6260e7d7644d4eac6a4edd3. 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/QZ22B2052617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cb43d3f24ce992b80a9b8e28d5b1e8f5eae292089ab94d86787e0e6c2b23f7. 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/QZFYZ2001775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92890c67ca222447b8048471ffc2a298ff318615a986f79356b44d2c50da04e. 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/QZFYZ2001776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd076196758e8c2a8f587cc0544d76aaad3d92779612651aa197049731f23ad. 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/QZK6N2465075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c7e960babc0539d0cee227dfbb60f8d9fcc96d3404b4d17dc38c3269c62f98. 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/QM4TW2456764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401063191736691004ac8a2ff7ba9e8ffb74241e07bb5b13385fd7f6edd37684. 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/QM4TW2456762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7366360dcb8ab150de97a5ace00379ed0eee0656a8f24325276ced2ab96402. 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/QM4TW2456756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404f307e282ac033bc544b2963f3cffa90f27624d494bf89770d5da4a1079166. 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/QZK6H2365623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc530d7b289a864a57fc526c53399ad0f45dc5c0b2b27262760025d3d9cd2a8d1. 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/QZDA42244468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5878ed2aa246edc77bbe0ca60b2f5d2fa1616bc5abc5aa9ceff2048fcb240813. 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/QZFYZ2172414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc97a4739cc1764c1937e0b0fd1e8805ab02a66d2fdd94d14aac5f02cde25f9. 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/QZHNC2068822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad50899a234f14f8b9f186fb50254e6cf424028b91b0479859dcc1745b071410. 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/QZHN32020829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dad2d365f939c5eed36380898b882acd2a93bf55be47308e763733f7227f815. 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/QZDA82006203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c4d3580812ce788f7d7283d4d2b93058f47d85cb38a10577d12b8f39ec7091. 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/USAT22406455.