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 0x5355861a1f283c5e2622656942dfc377bdb17e1f4cdf36738dba39da37e08450. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43ffb14d-cb19-4a6d-b9dd-4799d8558553.json and https://artists.proofprofile.net/proofs/artist/43ffb14d-cb19-4a6d-b9dd-4799d8558553.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 0xbe6d1e1f0beb613d61f031493029b52b64e0f9ce00d0c3904db95ed99bcf6427. 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/GBKQU1601947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0d40d39ceaf08d8400776134bd660dcbddb8524c90911dedf9ddc2f2fb0e9c. 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/GBKQU1601948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a345f08b6d0bf60ea51cbd3262ef6cec599c61ac3a96f3d06c79432a85c27b9. 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/GBKQU1601949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebdf344e0305bd76163bb894871f3ad227662066617ff4f5353f017c7506886. 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/GBKQU1601950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fba41056050a9d6ed27ad92ad331b338a065fb1724ca50c3d1be63e02421eb. 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/GBKQU1601951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f431143bc68ad345632c9c89c899b72accc6ebd5d15487ee11ae1c6d95f3b0. 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/GBKQU1601952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1b9945214e915525fe6bb696f6501c8de6c0bf82ed57e366e1465229ba5bf1. 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/GBKQU1601953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f063527a353ff52a8dde2a153e6f4c25d586a28e7c8ddd2b7b34806b8ec27f. 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/GBKQU1601954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299dac431769fd9e102489faabf37e925db39f6472e52cf430d5de2e7f49d789. 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/GBKQU1601955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df09cebf2ba244dce6e21b573ef33cd501f112c039a7a0bc592669f359b784c. 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/GBKQU1601956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c59c8346fdbc5cc2a238e5c863ef9272daacf6bf5a80f32bfacf760c6e208bb. 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/CH6541661879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37d87981f72f3cf30cd945211ff1ebbffd3d3bedb3941bb5f9290b2e005258c. 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/CH6541661880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca09ab54c9aeab0e8cfd19dcf306ea5a28d6630b72ef0152d602549bca66bd57. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CH6541661883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728e6cd13a489c2715e10d83567f383405640e7a573cdfe9354bbe4a6b790047. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CH6541661887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8542a3d9561ad7568d00b99dc21c648dfbf8500a3931ae2cdb9a634030ee8d7. 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/GBKQU1755551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa736188165b3daaa94b673e17b8bb4879d8792eb8c1631b49e47c42ef7bd3961. 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/GBKQU1755556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea57e7363d76f840c8e0965b688e595347ed8b7a034da80d756abe41198b25b. 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/QZKDK2009834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddf8a5ccb64f71def6eec74f51be40dc167dbd0ac206ed4353601510e0018bb. 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/GBKQU1512134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815d82772f2221c4e689b13c9b348a607e4c63dead9fe47563a315d4ff0a4356. 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/GBLV61500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e74838852deecdb6651a32778da0760401310b8ed1f31a636bed76a1f8bb26. 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/GBKQU1810737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f92ddecececc08a9ea759bc5893b62ab6a4509d9b17f98c4b4c184c5c65dcbf. 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/GBKQU1810742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc24cc4b2a605ec3c780277b384fa55af0daa5067a217ecfa575745bee6ccfe3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:05:56Z), 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/GBKQU1810744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa822f68d855009a6324094a0176d129877b6c505e9bf5978116231d3aa130ee2. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:44:20Z), 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/GBKQU1810745.