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 0x02d172a8384b906951e236b5b0c1b46c1245cde98f4959b9d73c8b7b9d604383. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6019d6a-756e-4afe-be9d-84dd628dd05c.json and https://artists.proofprofile.net/proofs/artist/f6019d6a-756e-4afe-be9d-84dd628dd05c.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 0xbc93db49b6e648ac0de8224ae22d4edbe95df3cf431291fe612034bca7579d74. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USF281746001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60e96921cdca7b3847bec79bcc1fd401b82c9e6261d58cb35d4c2997e5359ba. 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/USF281746002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a0af2f8271b2b9a9b322154013f76a086ec81d0d8f155d5db1578b46c96dd7. 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/USF281746003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58e7c5e80651527cd186e424cd4d11104e7f6dddd06e319b1f94d61093ea0a9. 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/USF281746004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f181b428ce8df8ccc2f7f46a0d83be0d51814b2ee7a41350000f995be18809. 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/USF281746005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2285320e794fd58c6aeb791881e876c8ae000d366882683e4dba063797fa9da3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USF281746006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45cc3db06f73d95ec039252fed01340bf096b37e32485d6df68ea3c31f23b43. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USF281746007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf855f4faee7a5c94ee8c5640889ca7d423065a4c77689fd29666b3f68cee3688. 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/USF281746008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b5e7217bc4d92437e655d56eaa5779ea13ff07349788652b0fe17e52dec90f. 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/USF281746009.
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 0x099d83f1120b5f04b8cd050ba22e60bb72afbcee4a39efd6e25a9799c570613c. 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/USF281746010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28628f21bec0bbf610c3a6bf39fc9b421f2937e3908983ef7b6b72603c26b7f. 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/QZTBC2338027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b8c91c40f59dc4edbbbcb9afbdeda1e0a9fa2d9387885ee39d00af5dfc7e76. 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/QZTBC2338028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b45f4652e047ccf51ce15abbe8dc61709ffb880694a90c8b5dce45ed9a164c. 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/QZNWR2306732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42713122f5bb5d91e442877fa3fd3e1542c1a294d08d8f468d9741e4a7ca4f7a. 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/QZMEM2376131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2b172e75156d73004605eb587ac251b0145393ef97bc37bef40edf584db92a. 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/QZMEM2376132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a483dfd6d0385ac176a3636cce979e39bff4ca6a7a9a2793cd3ae8565cc199. 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/QZK6N2337591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342307ec49f85ef8bbe1d188a08853def78292445b5dff958b8d63cffe70ecc4. 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/QZHN52303304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14610df0c5d735d2c44544016edc5067813833f3c2d19b162760b61492048603. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFYX2319710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f734417453cbbb85e7c0db2f1ecc376f2871a78f82708570019fa969e3b75af. 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/QZTB32281298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb583d1c9c9eeb7cc02ead3a9a73b5b914d765f000801ba21252ef63b85c5f095. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZDA72254605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4264d053291601a9c775e1f0c3f2c8ca3db5abe2d59dab81cdcd1423c2244a8. 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/QZFZ42250347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99df8296d1bd01432888f4942e0013cbc29bd236b3d57b5dcf34d7d5e379dea9. 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/QZRP42155986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3236881344cd7f164221d9b83b1282597ecbef4d9c06acf12c8cb08457d438ee. 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/QZMEN2194990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f95f4bd1f259785eb97d7b6f14e17303c1171a57dd85c287c16412ecdc19d6. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZHN91987853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf352ed25a4092d6cf36fc52856aad07ab5129e5310aaf1cce0a6ed0bead24637. 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/QZHN91987854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7267fd56feec91ae88b11e72753ad1cff220636b77562c9e4593a092eb0b6034. 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/QZHN91987855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4030af2dff8eafb0977bc5cb1ef167b9109e50a6845d0be66c1d7413b01c23e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZHN91987851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421fb55da0b93c37b094074750e44bc0b859fe5d81640193def343745aa33dae. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZHN91987852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eac07654f954428a4cad0c082db54416428505c9d76a814411f737af694e77b. 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/TCADU1889556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaeb13c720d7053268f98f988a74126112e99fa7bdb76c5d7526277f914191f. 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/USF281726001.