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 0x068b0afb92f1f0822a5ee99ad39bd256571f702c16cf7d4d4b062c9e97162d4e. 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/79fbe320-5792-4f8a-a706-484cf6044008.json and https://artists.proofprofile.net/proofs/artist/79fbe320-5792-4f8a-a706-484cf6044008.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 0xbabe44af2114b685dfd8226df43d3dd58173507ad1df377070186d67c98f08b2. 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/USECE0900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b56e4071882e2bc1979303a8394a45a598f9a19ed4813fb9322725b99c3fb2. 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/USECE0900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747bfff9427a9b2d446b1731e226fef1b34ea713fdb7ad54c807fcbbbe9fbb82. 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/USECE0900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46db189b3985bb03e7418e88ea7446b6c0ad6d24c81e06033536c98c03d334f0. 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/USECE0900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19454312a01366a98d86deaa897c897f99ef967d38a025bcb8c603c9dde13789. 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/USECE0900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2086332370538399d834a93f39bc4914054a27852c06d5e2baf9efdc35109c. 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/USECE0900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49821195eba568791feb87112a4eb85ca104a45a6a4a92d8a66c4405d2013332. 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/USECE0900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa058af718be0de6dc23bc079b2d14f832f2311405600c90abfa0fedde775106. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/USECE0900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7282e1f8973334e1e678c1641d9879594b53b8b33f85a00b3bbb1c4cc0c3b414. 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/USECE0900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989775f9058e2ced84d57e3025b3a960d7133411f26a287117b644f9d3ce1824. 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/USECE0900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd83b82448fc0f905eb6cf8725de7debb5c4c023c060f52eaa4c2fac55ee557. 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/USECE0900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a228287801d4634c877dfe0cd787374ff1c464432e99692c07c537241551c8. 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/USECE0900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b573f9d0134eadfa16b82b95a1f7641307bfa842c3dd62b236d57d2eb3d97ac. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USECE0900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79e634c4c8ac1de019608dfd500f97832ae09ddb15810e5ac88dffb23af12d8. 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/USECE0900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3da275f546331a4a13158dd459a062e0cbc9ada81cad0a611a65cec4d76305. 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/USECE0900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337814b58ce80dbd1bb617c4b43f178c981f93c5f54157ab29d6a4e4d4dbb373. 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/USECE1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe56b55d089632d539d1ea319cb616a4b3eed46ec6052b2834b003590b6c016. 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/USECE1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88a2df0d82b6207ce4f05d4e228d89eb2987d1df2e3fc1d42ed876bcf6ed2ed. 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/USECE1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd2d4b6da2ccf02034aea9cbf514324195ec175ba14919bb5741ab7f84e6574. 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/USECE1300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb47a9cd689e309761a57ba72c385e58d2152aa3bac7f1525545af688137ba6. 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/USECE1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa176d58cd0d84982a76538c60f3781c9a560d30d41b68230bec02cf0ad7702a3. 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/USECE1200153.