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 0xaf85bf98059998dfe03d0b883690bacde11cf73f2eb211f5a50a6893347717ca. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78bbdad6-d8b2-4957-8f9f-acbe00bb949c.json and https://artists.proofprofile.net/proofs/artist/78bbdad6-d8b2-4957-8f9f-acbe00bb949c.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 0x9ed494cc6a8d5eb9e2e8fa732c40308f2d9543a91f179e6a5888d77094d61839. 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/TCJPE1663462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c5f2674875eeec562c7c7fa97ce1b85b2c6dd28e2a94ed9391dd7999518db2. 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/TCJPE1663465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dc7e4f63ce7062a93e4286be3be2be8c8b5124933a3b881ce625dd483c93d7. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TCJPE1663499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6feb9d3c19076f6829f6db43c009d3b8f14e0a4ba8a77002e6d69226b6cb048e. 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/TCJPE1663516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee0618c63d7f3a7c32cde0b3f045724da6f8b709e00628e6dba4868efd5c45f. 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/TCJPE1663539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a68992bcf8806ba25f6ed3729514ebcd7d11ee2dc8dc5e0098d7a8829ae843b. 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/JPC730600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24a53281fa97b16d1e34293d2a6cd5acafb0a1cafc1d16e43a52482596b5bad. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPC730600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa26f597eba6573bb8d4621699630430b6f6c2bbd23ae09ef720ee398e03b5ff. 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/JPC730600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215fa16eb98ec34041fcb577065101f4df3aa36de8b321041c4884c0b7176600. 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/JPC730600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa033c0616300a361c1a70af552994fd76581bcd6c3ceac8976775a34f5e30682. 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/JPC730600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487714fdb3315ade2b385ae8110e4a532f8c3a970c5b2ffc67871a274da97bc9. 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/JPC730600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44690b41d03e8eee7885c104f1eba60cc0923e2ebaec91a86788894ec5c3ceb. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPC730600021.