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 0x74b8d330da435dd8c7dce46f073543e7178dd3171970d30e1170e58e208c14ed. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/672972cb-5675-4bec-8e32-dca0dde9627c.json and https://artists.proofprofile.net/proofs/artist/672972cb-5675-4bec-8e32-dca0dde9627c.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 0x2a538f5548bb0601e75f86f0885b1d4bc6cd587ec8591a58065f03f3a04e1f9a. 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/CH7812224388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a50a5e53c6d1dfcf52cafbf4ad514834c1f60e6ea3cb997508ac73ad3cdabc6. 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/CH7812346324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a67518deddf9761f239f7d24c5dd011a3d8793821cb4e55732d0e977a4831cf. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CH7812353160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fca868ee779162fa192b0a872f5321159d1b26474e5f5b97040162dd84f8b3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH7812353161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb20d92c09ec74a9b07c8ab463a61b77939dadec746e92d2166645ec88cde3e1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH7812350754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410b1d714775161f89918061fbfaa63a19f16c49af814482989754cfef6c622f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/CH7812348722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f800cf47c26d1bb1beae50234eccea738a502853d82f2eb26971afb97136e0. 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/CH7812353162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca8038b32bc5cef72701d7c37fd43fac9a8847438e4dbc59905f962fcc05d0e. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/CH7812353163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910dfd8710362a43222e95896da5133bdf948963c1217e6e3015c2b72ed2ecf2. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/CH7812353164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b280fd4821af13258f242b0bc08b91dd705f11c7496e2b757371d7180d7236. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH7812353165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c7747c5aa5309b247dec67317f1dc12959a1b0efa10d50714d89c7c088f4ff. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/CH7812344169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c06810a9e2bb779a59e256eae0fef397b2321b1ba7ca87dc6b80fc95579f41a. 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/CH7812353166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6918897ed0b919559b6654992cda91cca722e61b69be4201d5c0f4a2eb2d845d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH7812353167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2573cc76a1d4a670d871dd1d46eeeb01c4b3ecebbf6c52fb472d88b236fc4f75. 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/CH7812353168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d6674a99a95e8bff74208897664c8fee3684dede4000be0c2eb921a573d7af. 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/DEVY82300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e60e234416ca7c1062a977faa28492fcab3f8852691890b696368bb6f02cc51. 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/CH7812235064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9d3a8ad58074c6334782c66073d46277e12206e4677424efb33debcb318dfd. 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/DEZC62163903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9d3a8ad58074c6334782c66073d46277e12206e4677424efb33debcb318dfd. 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/DEZC62163903.