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 0xe6c97983535102e120e8ff0d5149d3ccbe8f2a890ab7f385e981267d54be7d73. 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/72b4bc37-9785-439c-830a-4faa4b539cc7.json and https://artists.proofprofile.net/proofs/artist/72b4bc37-9785-439c-830a-4faa4b539cc7.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 0xf552d9bfcf64fe7aeba896b7c954f44bbaed89bcd4fcb4c9f57b9162a32f6b14. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:02Z), 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/QZHN52047296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc9a17a2c4d15f886b93a1f8c2ababce70d4c998e54a8820dd818fda62a2a08. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:59:47Z), 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/USA2B2405089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b0a673df6858b1bd861b3756bce1a0b4ba6203e37cd8749e7cc19289aedf73. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2B2405090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89713e8213036ebd136d4c8286438e8ee66ed7ad600e0600aba292c6938d0dde. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2B2405091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1e44a480c00ccccc4b259eb35a069945e4ea9369aa9c72dfc83ec73a38630d. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/USA2B2405092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecfdbaf2744f5306ca25f08ee5736818cfcff4c7a2219a116a436a745c1d404. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:06:10Z), 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/USA2B2405093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc78a9d824f92c9d9fc65ea5f51b87d9064cb4bebd1dd2e509dff89973944560. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USA2B2405094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc9a17a2c4d15f886b93a1f8c2ababce70d4c998e54a8820dd818fda62a2a08. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USA2B2405089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b0a673df6858b1bd861b3756bce1a0b4ba6203e37cd8749e7cc19289aedf73. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2B2405090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89713e8213036ebd136d4c8286438e8ee66ed7ad600e0600aba292c6938d0dde. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2B2405091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1e44a480c00ccccc4b259eb35a069945e4ea9369aa9c72dfc83ec73a38630d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USA2B2405092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecfdbaf2744f5306ca25f08ee5736818cfcff4c7a2219a116a436a745c1d404. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USA2B2405093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc78a9d824f92c9d9fc65ea5f51b87d9064cb4bebd1dd2e509dff89973944560. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USA2B2405094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344355eaa07190652ceeb74603b6f07b4af694aed6b5567b7e0273feeec53389. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:11:06Z), 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/USA2B2405095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8146daae2473fe2f7f7ab2ff00bc1f5dac0e2101a76da31a6d01bf0e70f715. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USA2B2405096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb28bfd289ef25f119419bb826c9d5b3fcb9959fa1473b1f77683f40e2ac27a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2B2405097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd749b90e310a4afc32f8e6027fec280d0136a1ff7c60c2b173ac88efe3a16d2f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USA2B2405098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136f98001f5ed3ce0b030da7ad98541d09b0967784cd84d33737073676489768. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USA2B2405099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4babf60a77ce50b7ea11800404bedc11ab290774204caea68bae0509b60e54a0. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:21:38Z), 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/USA2B2405100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6c533d6509fea741aa73107577ba4af6952396ab056b8fe98ae20648b68730. 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/USA2B2405101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88ebdabfa459c1f2cbd125fe436f68b9c718e3d2d5337107c45f8b756e4251e. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USA2B2405102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b57bf775a38af4f4e3559f82efea5d4615082f0ff88c380915ffa35f9b8911. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA2B2405103.