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 0xdbb94786ab4e187a842ae6de23b99ae9486e726de83e5f6dd5507190c4965726. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0cf3bd5-c309-48d7-87e2-bb51b7ce1db9.json and https://artists.proofprofile.net/proofs/artist/c0cf3bd5-c309-48d7-87e2-bb51b7ce1db9.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 0x02734cdf38af6587aef2782b9e1e9966f6896880c5eaacbdb55f7a960cd1976d. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/JPB750315901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15db417ca4b79b59927d36ba89040410e11c34666cbb494d6212c6040189801c. 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/JPB750315903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cf62f743003549209ec8b1be8f2b89f8c725039c48ca2ea9e18a881d52a93f. 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/JPB750315914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d4d50ddbfe3d3085f7bbc1a6da6b7f89c0fa0646aa009783d48045868e8c95. 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/JPB750315920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ba3e52ac9dacdd40e6d80dfb40b080024ef60d38bebf775f9c30f4ec09da55. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/JPB750316305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f10cec2b899b39c7f7a0d54316cde0f062be04e4511429f04df71e805ce933f. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/JPB750316323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b2a218694c806115cbc6b18526dc071ee1d720da259bd7ee53eeb2fe5617d5. 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/JPB759909202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931e59d55e12cbd320ae124d16a48813afb3256abdb65de36f284c7e3f768f12. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPB759909206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68756612a60499c1757dc54642ed8593b940819835e04608b5f3bf51d165dbea. 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/JPB759803801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd085e091d4e2844c62cc9e0ead4a9a0acffb757649a9f8b24f45f05348244972. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/JPB759803802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c64cbff0e50e14eb2d289a781e590155507f1afad22b045548e450e6fd717f9. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/JPB759803803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f5113ead5e93134fccaeeed82966506b5120a7f5f1bcdbae86dc91a4dcbb57. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/JPB759803804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeca7a624d077274c6035bb0f2f00c7bb3b5fae9126070554de21490015d45d5. 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/JPB759803807.