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 0x4ed5371775f7cca6e22876d4ec98bdc9d5cf3123f862d972b5bd6cb5124e94a9. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d0429c7-4394-499e-9382-6451402f8ed8.json and https://artists.proofprofile.net/proofs/artist/2d0429c7-4394-499e-9382-6451402f8ed8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Johnny Long and His Orchestra - 1941-1942, Vol. 2
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 0x1d5d4f3579dfc9fa6c1f080259ab58f142375f9d819a2966007434dae6d778f6. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM7282017537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930c5cc9b41315f0b03e5c4dde41777df44e805d24c3ec5731f56f4ba516c2d2. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/QM7282017539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78ff09ca8a47d81a5486f1b0ff1d1557f1903e9ba580cf0e8ce4db7a00c2e76. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USEEC0611013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbbb01f7db4db2cf7d8ea91cf0bb9e6c4b007cd671d1f7c0b01300653359a80. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USEEC0611014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36229084671cf6a7340b415c4ab317f919230bbbb827ce752ebfdda91aaeb2ad. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USEEC0611015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0bbb24fdf825c21f759bff429167283dbb4c9931069dc1bad00a69be0b9d2c. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/USEEC0611016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420d8380dace5d8bddc0e4a06b0c2fbb65d90d84a6cf86ce42dba7f1aba4bd4d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USEEC0611017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e6dee82a6433e6745e56631bde00877d1e9d7f16fa81fb17f0f883f3c1e911. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USEEC0611018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5376bd9d5d8cb1f981334668f0c1ffb5c129d444c207b0e05cd412adf39b0448. 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/USEEC0611019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e963216002dd7a81b639fd920a32830ea4a1268921bd1eaab97c45058d1836. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USEEC0611020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59abe26d6b591646110751db994988ae0ff67676cd3e33588907119c92204ff7. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/USEEC0611021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028a0541c7490b51d6c60fb3a2de814d4e0294c075af68221630159933971028. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USEEC0611022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb927cf381229e5bf0bcf324a6311bf067b01b03e475c6ad6c2e7a8ace7be6fd. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/USEEC0611023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fbae727c90894e3fa893387e587667a1fecf03c702853bc7206a21f21a7e3f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USEEC0611024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7a053e6f7ea889ca4c1e9c26a9979e7ccb354b716747a7b4172d2c4db5ce64. 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/USEEC0611025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06813f864a0fd085293a37705fe7a4d183dff009128970e33501c7275f5c2e8a. 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/USEEC0611026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a746a5660bebfc0e2a9b389b86e9bf067111b130589552d8215c6204d330662. 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/USACU0510802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5430dd4e262354d44a65ad1d9deaef11622e1f6b8d147cfb32e7a00001b59a39. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USACU0510805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd53382104443354a8f93b4b07f24821e4e73bf921f6759a248927ae9cba093d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USACU0510806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bdce92ee5b852f99206416e09a15128788a3415c9cb2d563d1c2f48aadd5d3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USACU0510807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a256ad2d553ea6d8aa75428f14a8c57cc62e116971077bb4c16e20ffd597da. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USACU0510808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc53bbfd35035cebf72d0cb839ebe354e33f6e517391f47a804df0fd12ec112. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEU472211115.