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 0xa05bbc4b54555d0863bd936fdb5786031e7a99001874d0abab1397ce8e84f386. 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/bcf73eac-46a0-4f9f-a331-5e754349b196.json and https://artists.proofprofile.net/proofs/artist/bcf73eac-46a0-4f9f-a331-5e754349b196.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 0xb0d3ffd36677d12fb0a0346369efb2a950635e4cf2d4860aa8e1ff9b40869077. 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/USZXT0809963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9432105b35a65f3c53e13b1ce432dd2f2dc917a771fc12679dc998c8bcca9a. 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/USZXT0809964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526c2cc55129480762c7a4531f03985d84377c7c03b48a1f19361ae61eccf7cb. 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/USZXT0809965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d9625ed123ba25347f0771fc20e8ac00ca616bb33c3e6c355fb4fc650e4f7b. 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/USZXT0809966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db6e0e49f071461528732d9d5e73c0749e3116a7b2a477235b5ec99a4c8f276. 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/USZXT0809967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92abae5415eb8221a20d61df13a1b6dbde6c75caca0c7eb6371504b0919e2101. 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/USZXT0809968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a109aedea71fe63f54f71d1a5073b668427758010b282364dd7b2984df49a7. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USZXT0809969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42df0d34dfa761ccc3d7fa8edfb153f005605b8113d8845471a16ab813511771. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/USZXT0809970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fb007597bbebab0dd91ec14ec146d12f72c3ce66b2d6c4c9d8c27e13f38db4. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USZXT0809971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7b47a00999200eaee62ef85a1512c019f6d5dd011a77dfd828bb6dba44c2e3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USZXT0809972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f573540218df912a955545f3b7ad31c4ae7e7901e1d8a27111c67c88896f380. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USZXT0809973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749507d15f03c1e2c28eb517c55a6bc0f9b37b72d4b2047146820899781a5557. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USZXT0809974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10edda3be79361403133c6ecef103d5a3d843fd9e760d95e76aec671fd1044b5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USZXT0809975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdef2e39a48e075a6e6a04c80764a06940690e2b0a33358a95d17f40e0f8427. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USZXT0809976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46d983dcbbb615869c42d0feeb530e1f74e49b61a2a21e40c66ae6f021e65c4. 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/USZXT0810146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b90d7e1b04b9e812c54fa7865257f8d5c91bf40919f609c7719636f24347541. 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/USZXT0810147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c0060cc10efbe784e0b1d56aec9dc336823d0463d54da6a241fe523c5fb4e2. 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/USZXT0810148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099e25d90bf55acde76a78e021c7c8f239e898a53c59d24cefef852dc424957a. 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/USZXT0810149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d001aadcbf97f064e6d8bde0960930218d4a2f3f5dcfddbba7adc87d3ace83. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USZXT0810150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9af2c5e4d2ea475909fae1b93b61a1f665d47287dc6dbca914a88ea6e7dfe31. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USZXT0810151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b275f0d33d0c0b2724a97a62dc5ad769c509bc6b20e1891dba221435079121a. 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/USZXT0810152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4172afeaa8bc65f93d63ecb5e5fcb58a37b1417b014ab3928ddb6b2795f4dac8. 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/USZXT0810153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8726a4094a0b6f2f75f64f074f4a49d130ec23822a0e49e2d27fe55885bb1bfb. 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/USZXT0810154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7e4ab1ef6b94c7dd05aadf60611149a25f256d8a71534541b0e0e36a7095d4. 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/USZXT0810155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8867d7d1fe1912544c1eb169750ba02ca3e8580b014253495d61f0ccb5749396. 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/USZXT0810156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b0d19e9aa1dfcb211e9e2dc578a12041917de98e97f16000eefb2aae898f4c. 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/USZXT0810157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d1c88627b77cc0d751690bb5baf7f223e20e58ffbb674d30ebd361a6a68368. 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/USZXT0810158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87d808bbb38e1eb2be8eaaa8d9546994aebc64655106ac4922ccc35bba6decb. 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/USZXT0810159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180ef908e5e7e2a9222f903f5793947b3b6b398faf46a9be81b060fb98438d7b. 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/QM4TX1962429.