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 0x4ba91603b9546dc01a1426f0098b2cb8e090b198f09740779c77216e5f823b42. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ddc3558-c4f8-4500-93e3-bfeb9e1c8756.json and https://artists.proofprofile.net/proofs/artist/9ddc3558-c4f8-4500-93e3-bfeb9e1c8756.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 0x18780b5b2c98f6837fada1683a30d1e2abc0668935a07fc75bf3a75e0e464417. 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/QZAKB2463117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da9ecf79f82d7eec03266c66b4b689f759837d4c953fa1df6d08e553d8cc3bb. 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/QZAKB2458668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff26859f8e35fc8ea8f1d2fddf2e6872355e06c727738e81d9c19d90105eacde. 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/QZAKB2456864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fdae5f75637571e38eca14dd76dcbc9dc59d883cab9ee3afeb4899218b04c5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZAKB2404280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf03ab7b04eeb040aa362ab08a7bc92f848b226a61d1a9560cc0683261964c28. 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/QZAKB2369278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5772eb8ee3f3c69b3f4a6c2a075b47fd3c8b06f4d0b2a88e2d028a8c007a749. 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/QZAKB2358632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f54d1bcd58e27b438f0175d9099a24c61e5374d6f6945a3cecee09e8098b54d. 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/QZAKB2351590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd039e633072227d11ae00fbe3256c180be31c08c759d62557607966f9776d37c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZAKB2349483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83858f3552d3499a06567692664bcef2f496682b8092c697c21ad72f249720b. 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/QZAKB2321836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9c46658a637e31055372f97ed292598de92b783bf132e243dc35bb7c47dedf. 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/QZAKB2321837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302959e7d8f60402aa45f9ad58f59ec903c415e3a2a719de49db2debc3e64005. 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/QZAKB2321838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cc68bcd15b3528b5c42e05e0d19f210e52a4d7761c2590e5728adbe30e19a8. 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/QZAKB2321839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cf8f0ddf5be2e422017ee6775579c69724d70182762a8451126f8e3b1ac83d. 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/QZAKB2321840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6195b25fb98abff2510e19531993e299a7c8318e2cef42909aa2b99bcde3c82d. 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/QZAKB2305849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545a0c37fdf562edbddea23db2ee4e790bd8b076657f2817a6961f2836f195bb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZAKB2305850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6863cb6692583dc01e82f429372e5c9854af61e6dcfa0a0cfb36bd39f90fbb44. 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/QZAKB2305851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765251681ba07036352defb3c3b3b82cd7dcdfa2af9f30c63ed6ab381f0a7181. 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/QZAKB2169838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b1177e1fedf9d6e49c27d3dde58cc895a5df8d67c8a526c25dead8c9559d48. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZAKB2167643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf13ece0416064d4b419e787425a91dfc39b0ebbdf62ba7741789415caec558. 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/QZAKB2167644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7ec2d140001e1755434b51e6b28eff6c696d24a903b950289d0290daebf747. 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/QZAKB2166168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e46ae6b9213803fe0c0183b122f76b95c48559add8074327b06aabba4866cb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZAKB2133299.