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 0xa4950ce9d6464883be8a41b5a13dac10706b9f465694437b12dce135b13feb14. 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/5d97c612-f9da-4a28-a879-4761c7971a9a.json and https://artists.proofprofile.net/proofs/artist/5d97c612-f9da-4a28-a879-4761c7971a9a.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 0x41c24dd6475806e32208f20c1b6781c5959b59b005602e18f094ec0280c03dd3. 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/ARGO92200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae4f17ecf3900a64c6b6b5e363a19dd0fe0a8170199346dc42f4f697a863e96. 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/ARBG61900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd759cf696ec784e00423ae72fc080a0ecd8a882617303a770b88f1ad7efb50a8. 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/AR5IR1900438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d98b65c2709cdb53852d60833cc4a2df46d2fa22464ab677e41450fc22b285. 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/UYA522000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee209563a751c3e54c86fc8da4ab4ae862f04591f6fbc381b89040abc736a52. 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/ARF101800232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687a1d5cea764eff9e4d90188467f4dc9d2b2389769fba53a9785231441375e8. 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/UYA522000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0af3e2109cae6d706d805e2c76beaa7e36684c1ea625ddfb47913e5ab064b4. 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/ARBG62200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a361301442fadb6a45a2bb1a2b982ce99b2c5270c100aec7c4e5100033fd2a9. 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/ARBG62000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ff540d647994a807372f7a284f3a089540970d6ccfb343ae3c7260c18afff4. 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/ARBG62300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5889a7eb61ac1aaa804aa4bc96f9fb36e836658a980cacbdc17a860db99102b. 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/ARDJG2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff75f892c02edb1f3fdc018431a04a9293529b160dedd004fa092d74f2aceeb. 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/ARBG62100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78e12430ddb184b56ba4b06cb80d5ac6320459f449aa86843e36cfccd1fe45a. 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/UYA522000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e1c424fe9f9edb1edf20f4215f85c8d9e80844fcf380ebdf3d88bf5793d997. 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/QZW9K2267249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbef9a3ca57fd25749638506816f2a4507c54708ec2700af8b3a3fd0798b9176. 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/QZW9K2267253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785344546842526539a14c97e3f99f15fb8ac6cb1b7fb64cf8cd92b24872525a. 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/QZW9K2267256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e1c424fe9f9edb1edf20f4215f85c8d9e80844fcf380ebdf3d88bf5793d997. 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/QZW9K2267249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbef9a3ca57fd25749638506816f2a4507c54708ec2700af8b3a3fd0798b9176. 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/QZW9K2267253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785344546842526539a14c97e3f99f15fb8ac6cb1b7fb64cf8cd92b24872525a. 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/QZW9K2267256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468ba28e688f7f80396536db678a8d3176a0d9f7f149a381b581adf32cda2157. 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/QMBZ91754534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee209563a751c3e54c86fc8da4ab4ae862f04591f6fbc381b89040abc736a52. 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/ARF101800232.