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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2128c56cee83873659b6e347c8fe63e93f1bae55c9b8537fca10fbbba71232. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3225c3c1-851c-4857-a77b-1fd51cb7f6b3.json and https://artists.proofprofile.net/proofs/artist/3225c3c1-851c-4857-a77b-1fd51cb7f6b3.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca71a5c3688aa2524e85db0d8a09ffe9208bb3c62d72f9e93741e202cc83ef7. 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/DEGR20100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34f11137dd10df9e74d4b0ac9d1ee012ff155d4e187c8ff3e5dc7b7f41125da. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DEGR20100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ffc319707449dde2434b4d14ea409ebc8f1cc96a14cb1934cec6706edd7d28. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/DEGR20100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f945b02890c28b35fc0cd4d76f25b54f79f228edeac209c71d225220de80add. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/DELJ81957978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac4496477cecf63034f9a2261a6e58036e8ac7784936d5a531017e71604b31a. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/DEMN92100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8d6304582dacfe4c22af99b2d0c4356addc142b8f64a1dd54cc15b9447678e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:51:31Z), 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/DEA622201088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eadc15634014e3eba097be925de7d20a5ee25cd78c134397df9c3dafc35a3c3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEA622201307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080314d7fb928accadec5194247f1b904412cc0008c25820a16f0dd838c5bfff. 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/DEA622201312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91806fb8cdd3a74378a56700e575547fee2929aebff5f1c481a0ccf53d29a22f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEA622201315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad3c623def53f67b0c9b670d3de0fa84a802b2a7cb80026acc51498c48ab180. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DEW872501019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9428fcc8a0b975c642983836a35313d102194eeb7abc94c4af6630c1c24df9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEW872501018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9a072445c10f71b90701963335a8925bc864f3ff8c4b5059c1601cf5f1bbaf. 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/DEMN91500209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc23de81477fc5465d45d68cf83345f4422db6897557fd05e0d9dea5283a5be1. 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/DEUM70904882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb030541f23904c4b69bc7fc79df16c280d9f9653e259e9cacfa18ab16253d534. 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/US83Z2235298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3986897701769ba53e2ef3d39785bc5d2497efc7de3c4ff3d5f8372ddd5516dd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEDL80700197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c508dcfbae89aa778d1cd56a72ce9ff5b10591c4cd86ea1fd6e9caae00d45a. 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/DEQ121753678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22efdd9a3ae0a96a64cb21903e96da43095a9fbf32a6ec9fcd75f7534f11245. 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/QMDA71589385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eea546fe59a0fcc8ff86f990f6b4d84e39eed9457dd9b07176d78ccae0cc22d. 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/DEC610701161.
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 0x647b45eae2d308598d99e11aed8453fabed3f863b1b26e11b13e59eddb9112d9. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US83Z2235300.