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 0x3d38150626881c03e7dcbef82ddb166c40dc2e5cf3fc44a19a5c33d75c3cff89. 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/eba5f3db-8d44-4e08-87ae-4f10a17f7f6d.json and https://artists.proofprofile.net/proofs/artist/eba5f3db-8d44-4e08-87ae-4f10a17f7f6d.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 0x82868002ddab85a61aa199963f8552dba8f7112f4dde638cb3f7587a777ec65c. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/SE5Q51813039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe493d251144401b375c657891243eff8db5eedb571cde04e32c24cbefb7f8fec. 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/SE5Q51823749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fbaae096e9b9b229e09dfc531b1c452513755fdfd82634bbed806526b7c2b3. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/SE5Q51812896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa090525168d52b98c54cddfeaa02dd5981cdc9bb96ace234cd01ccf61ef9fe94. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SE5Q51813121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0023f4218c9ee9cc5863468f551d03b9a6deefb33d336c4ed8f8c9e84fafc22d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE5Q51809227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b936ddd02b1be01d0eb31c8074455adda8ae381c4d0ed76d2755b78cc9b29e0. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/SE5Q51811970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db4e7f7697bd0fef5a21e10d0127105fabcf839b45163119f0f9bd1d8de4366. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE5Q51826502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403d35fd984182ac235772dc7fb9785314ef2e584a6e728798c476d7ccfc8273. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE5Q51812554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df1ea46c7e739c1f4038de951c30e89fc52db6c36c8e7b0d9279cc94d2f26e2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE5Q51819154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaffcbe450a7b53854496c157cef3615ed833599f74663e0f73f20047760409. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE5Q51805443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9731fb52e781cab440510a3c35b165bfd3de3475c27ba22ce26ea4a76b50570. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE5Q51813494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb828fa508da0f7ac5872492099fba16b37999e838ac851bf9d4ac2c1ce3d903f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SE5Q51801226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7915dfecc5ac4db6014ffe9c9baf8be3e55e00d2aeb0598aec98995decb49e2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE5Q51817977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f1afcaabf13248f8601b10d6df81fd2bca27d9f6729ff91abce2a187252d2f. 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/SE5Q51810590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065d18befae95733f2c8279707f10026d24694425e63dd3da37b4aad878ccf52. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/SE5Q51820112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59734916235dad931118496918f285648a2dad639a3b7f0f8e9c0302bd371ff8. 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/SE5Q51825315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04831c45b2c190325cdb96f7c7487a53db4c4206578bd07135c2291c2b40418f. 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/SE5Q51816347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eea3c0da5a0ddffb9f9051d60312d2f4482c8b2573eda7fff99e8f6925cff47. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SE5Q51809230.