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 0x9c5c0eb9df73b54502ff902d40a0f79e754a663577b78ee4cd9e4a563ba3c615. 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/38ab4c9e-d694-4b20-882d-94af6cbc65db.json and https://artists.proofprofile.net/proofs/artist/38ab4c9e-d694-4b20-882d-94af6cbc65db.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 0x7e395f2a219afab21c2ea13a46b5560c28a3ca59baa913ee23854723893d8bee. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCACG1586817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4799d9df3485951694687c95c9dcfcb5798d4eaa6b0bb6a3c8e9f0ad84353d5c. 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/TCAED1925433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ede3ff4c113d4b900f6b91acc80b632a0877421ea28e31bd97a54c2c55fd4c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:54:56Z), 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/TCAEX2025048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e30117c73a39a2d321aca4650a6d6c8ce2f9481f7a9b465ee7b4adcaf0aa6d4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAFI2149074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2a3865ef18c02c7e2ad02122972fa3d469432aac20cfbcbbd65275bc10f608. 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/TCAFW2153200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a9d78fa29737b43bba0ac6713095c230f0771c55ad7cd34939de940a2fb786. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TCAFY2155523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3202e7aaf89c44d043821639610cf658ad4b61a8a92b6e00d70889476965a03d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:10:39Z), 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/TCAGF2220590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b98bf9a0218a073b894acffdfb40f6b7c8d2471775e61268d7afb6cb038b4a4. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:51:43Z), 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/TCAGR2298987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677a911a70fabcca1a9098c3d6d6b143727857cc345b95c09ebeb505647199e2. 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/TCAGT2353555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa085cdc59bb328adad2ae0101667123b7338b5f2a755d70777b13a60a8a55171. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAGW2346913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9232fe6e14330b34fe374b8d779d870914549c7e921fc46710af53b7c96b5aac. 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/TCAGX2391524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016eafb650f77effb7057574c83b99042cc31f370bc8e192f575613d2f4776a8. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAHC2364303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9138c911dfd1a91d3fec2170bd5b1e3b044e9c0226b546d7e341a1d5420cdcf. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAHI2351257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7011e5f860db54815d7e748a0975387bed539ca68c542aebf5c2f5a996a8ad. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAHP2361891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422098eca984dd493c0c2492038fcfa5a900ec6ffe0bb9e908c75f6a98071cae. 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/TCAHU2463461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e90cbeba513384ea73189b72310f4f8a01404570594a46f287556a84284db8. 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/TCAHX2438569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c462e156f2d3a259222b7090751c79706dc220b2429e82053f1eab7d0440b4. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QM24S2406557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7e93288d2e4d7eede45a3a38a33d949ac7bdd825ee60e894c1240fd54ea916. 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/QM24S2407408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422098eca984dd493c0c2492038fcfa5a900ec6ffe0bb9e908c75f6a98071cae. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:08:49Z), 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/TCAHU2463461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa085cdc59bb328adad2ae0101667123b7338b5f2a755d70777b13a60a8a55171. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:09:34Z), 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/TCAGW2346913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd440767a4967d0e231e09dc946eb0fc55337f0513cc09c6457aef4424ef292e7. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:02:35Z), 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/QM24S2501428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9232fe6e14330b34fe374b8d779d870914549c7e921fc46710af53b7c96b5aac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAGX2391524.
Indie/Pop/Folk Compilation - November 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec01b915fcb8df392b62e25a3edc0b85958242c2dd341504f0beb4d5e931c00b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TCAGK2239437.
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 0x52b1a20a30a2ee38447b70aba5c0ec65839f004339e7243c864e2af96abaa57e. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/US7VG2382190.