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 0xc262158b6ca7bfdc9b033f70ddcc529b6a4c3fc1fd895f73585123960a3b3d17. 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/17f5cbbb-dbcb-42bb-95d4-2fb7a9a7fbaf.json and https://artists.proofprofile.net/proofs/artist/17f5cbbb-dbcb-42bb-95d4-2fb7a9a7fbaf.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 0x82e34fc67bd1631ce664d5d85c317724f3f93cb8820b0d003a0c043af25ce455. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TR0150500566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db6aa7adda2e54f9b6879ef03b25bc3a48ea3c0d0366f0db3c66b1516a08c17. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:44:55Z), 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/TR0150500569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e37d7daf1539160a2b576844dcd948b5e27d61ba50176e651feb1a1849328a. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TR0150700308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42007a218572653b8984172b17f35c544f2ea6abf7ef7851f0d35601cbdf00f5. 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/TR0150700309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e805a4bc69c098b5aa90b9090c0cf8910e8f2ee2af47a18da58d5f4aaf8575f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TR0150700312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5e22616497ab8c98779d200948342182c8275c10d9e0c692747238658e6a94. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TR0150700311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f7ca74a70cf16735155f4e9137c9d0e2398271476f6f4b916f0f834bdc8297. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TR0150700319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1197f6bd5eb2ec5d232126124f960091d108d61812d1db75680876e54e3fed. 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/TR7591100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c9e8738de3f5b3965d7b984dc8a82882bb2d68ffcdddd00242f9f9d4cc52f7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TR7591100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152896cf8b23083f5384c499ef673461b60a9bc1c87c378ba22ef861ca912dd8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TR7591100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09837e43b575001fd465820fa0a97ae0098d24c96d38a5a5f66c9e3e71c7e8e7. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TR7591100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d4dd8862170557328daeb1a0840b99d8296500d64be959c242131f58f59a23. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:25:46Z), 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/TR7591100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ce8ec18209f5fd0732bb9ca4981e4fbe307214285a0c0be50e99284419990a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:07:58Z), 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/TRARD1500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39b8e33360e1b2ffa42e2e6ea9173eb2c07b66df239605076bdc0a6769584a2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TRARD1500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503e54f91df4ccbd3c144831c965b089d48b7038911daca3a0d0dc61b6ccb707. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TRARD1500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf380ccae528d40ceaf25a58ae3999d08018e755e97c473bd3958f3d6f19715fa. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TRARD1500085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112d9dde73129e6730122bbaedc1d7110ce49fb5c474c28810a90841f54285b6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:00Z), 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/TRARD1500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f02457c320577361289076bd56c791b06a23f4a9bc68bfb0918634392eae06. 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/TRARD1500087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a44da106710cf7f7177118bf9754f9b39461cc81901d7c8e24958cd8272907. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:17:53Z), 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/TR0511804537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527449b93c4976d9cbffd8b0b23112259261b060e625413ba2dbfac3f9e78a87. 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/TR0511804540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d21d8baaa3989c014664e39d0d53b4499bafd102507cb721b750e346d54650. 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/TR0511804544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b4bed461c81c0b6fa753cfa22099c4202e38e1c0edebc0e27b53218800bfbd. 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/TRARD2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4593bbc234158221b1b78f4440159ce912aa4ba6572259f3b04580f54dfd0a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TRARD2400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a3c0bf60a611d0d25e7a8a0487aab4170e3b8ac36ef010ebf0c9dfe81d53e9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX201920702.
Seyduna & Şahrud, Vol. 5 (Söz Ateştir Her Ağız Taşıyamaz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b314aadd6c7966fa6b6c705c1b64fe8c106dc6896f29e36cf282e9367879c7. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TR0171000340.
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 0x2572578780443fc79ee4fe128396c54f58e46862c59b8f1b6b17d71a099744a4. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TR0171000332.