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 0x7597bdb2f367683fa96850e70e616f5e5fef7b6591332921f31d281f11e46021. Chain 2 (Bitcoin): anchored in block 953896 (2026-06-16T06:05:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fc42341-f568-45a1-bf71-8ba62372142d.json and https://artists.proofprofile.net/proofs/artist/0fc42341-f568-45a1-bf71-8ba62372142d.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 0xa0ab1a89b59c9e9679056cc0a0e13a5ab0fab4f4e9fc68e7580293ed272b0177. 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/CH6542102706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076d32ba5c9e2f9feac4214330e730278075ee90d68e0125cd290cf473387023. 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/CH6542102707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9ca6d467abdbb8c7e99392842f8010208885911eb06befc01375774ca29ce0. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/CH6542102710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c99cd73378e8d5da697c2f353ef94fa32c5d366b5415fd1839694346576735. 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/CH6542102714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fd3068b67df60c9ee174732e3f107be01efbc03b11d49b8c050038f83cd39c. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/CH6542102711.
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 0x275339f0c9fbccbb435defc2b37fab767a8e84427f52c5de129d8293451fc5b8. 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/UAMR11700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9ff3ee3e316914f196b2c22eade7b0544fe0ca7e41d5659735639ad10bef61. 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/UAMR11700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196f6b937ef78e4e632ce78edca828be41bb21ada587e1a49f95df59a86d0c3b. 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/UAMR11700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85154c405e572b32a39840168e00c6e6d0583dbc82d09aafecf2b09010519b02. 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/UAMR11700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a88b55100076732375b68e9be053bea1de2dc32d653b14404e95f09aed6cc6. 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/UAMR11700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee8bf8344f7c079eb123f2aae2777f11d85cf793dd58edc0f641925ea89c02e. 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/UAMR11700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3bd7b97db04e4dbaae7d93fef239988144a996ab757493c8fc4593888c816a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UAMR11700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6deda6314e7d83c9a909c76848aa8325beffdd6838e53ed440ea5bbe09db084d. 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/QZKDK2073909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea57e7363d76f840c8e0965b688e595347ed8b7a034da80d756abe41198b25b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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 0xd313a54465d059c2258219420e18b1191017f773e9a6fbbf3ebba1b18fd8a0ff. 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/QZKDK2057837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa598fb6022465fa625db56e79b69910356904ef336a6f2abec0fb80d75a0c8dc. 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/QZKDK2028578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c58961ebd4682b36b6c1fa03ad161c6053ad689ac79d7960d52230a80c9c855. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZKDK2057313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa188ac45f96c91ace7844faef94b6478ebd499dab48bd258517e7aa642a2accb. 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/QZMHL2598998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe774deb3edba7372818feffb23d269dbf7560508c87f2b3e7dfc706023746122. 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/QZMHL2569155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807ce3b59cb3efc9b93d7ae70249cfb9cf0d114ba4ebb9aaeccd124f6e88217a. 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/QZMHL2534063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ee4446422eb033b84ef1362a6c465c45372f92d187b7094130b7999322cf22. 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/QZS632566474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63299b52c16024c8f89168a1ab099956b28964d02862aafe4e66fc1e98f22015. 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/QZS642537733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ded52a24fb717aaf0979dcb293506111507627b3474449b22a09cd4a82e45a. 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/QZS632510193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87022823cb91cd111e79d27546b943f867862418087c6fcf0def67ddaf21f07. 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/QZS642522996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5246fa84e88becd86bf1a4a377f935dbef4602ad3555eaaca94a9b6b9f054009. 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/QM42K2515101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54764d28e3e2aed6e1a2548075889b034339a0c5a4efa5eaffbc628c1c5534c9. 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/QZS642521276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c46d1befb86055ad859edf1fa1d1a7f628bf15a7856d75d707352b80f3f8f06. 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/QZS632556397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70285ad88bbf7ad6cee6072d95cfbd835a3b162b4efd4d9f8b74e0e4ee740d6b. 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/QM42K2538699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd384b0604bfbabeface9080eac29716175f016c912cec4f8b6d3800ef7434330. 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/QZKDK2010478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2ba30d0e2f303b7610ee117cf6c58c9d8b1bc2aadb499157c07dfc45199b2b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZKDK2088672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8889681def564cc8b2dfec27d7e8c189c094fee76aefb0fbff2c948bd63236. 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/QZKDK2014113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e6119247355fbc2fccc57d85f65b9f03a8b38c729098ebf64e781846971378. 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/QZKDK2001901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2605fb098671f5154047f9077132289fd6b84e6d8982ceb93f3b4774e6a585. 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/QZKDK2091071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5d2d0b72383283861d4ab6a523437a5bda69c1b753c80c6136d3a36f49af58. 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/QZKDK2095671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969d563331f5310802067cd4db782aae4399f48071ad1830fb6df5039cf1b74b. 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/GBKQU1673325.