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 0xdef8f024f1bd2bfafd52324403b3e7ac57e1cd45ea137cc69f80fbe3a5d91517. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c9a679f-59ec-46f9-b53b-020fc0b00337.json and https://artists.proofprofile.net/proofs/artist/6c9a679f-59ec-46f9-b53b-020fc0b00337.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 0x4f4721147b4b34290ff63c5011a8b5dce9e7a762fe1c8bfd6fa2a77ab35f1b4e. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZTB92297258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe984041996043a3893b997a4f5b80c85125a4a79acd8158d49c9a87a79fb654d. 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/QZTB92297259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02641033089e605bd17a03652a22af33f731dc38c6eee83520ebfaad068a6209. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZTB92297260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346b11acce92a54a207b481e3771c237d170958067cd0cb488bc234fffd3ff67. 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/QZTB92297261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f3d716783ed5f44764963b83338416a4301e0a1299a389a0f88846c29d57bc. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZTB92297262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd180b30ab32aba9cdd33045a98afbacb2b2a924f1c4b6100d0ddd2d5628a83. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZTB92297263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fd399107f8dfb82ecec5e378e3123b178263714c595e87230245e607c33c3a. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QZTB92297264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebddb5f36ada426b3a551ce233d797f62e526339f308b6663e6fcfc8a3f3edb. 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/QZTB92297265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c77909a1fba25173571ce9ab4f77175eb1c4b5aeca9610c1170bdcec02c1f08. 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/FIZGN9400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687903eac48eb760df6baa491ddbecab63acea5e37fdbb9170895965c91f9190. 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/FIZGN9400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c931d1bebcefa2ca20b91f287f4b607ecab692680276dffc0c7e61630c90a1e. 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/FIZGN9400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdde950a4a8aaad51ddb649994d3bd300a9a7ab3866d4f79d2eb5aaba55e046. 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/FIZGN9400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58de6ba1ec14f902443d86bbd90909f66fa46d648c85ba48d9dc515bafeaeae2. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZTB92288479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea637024e4a014ea36d57f3633b2a67fcbfd86761f65029ca4878215632cbae8. 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/QZTB92288480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bf120ec91733d8d0815dfaeafad01149682ce1b8a49d6716f3e6507eb77e44. 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/QZTB92288481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e47bc72c415065eaa4f8bd95ec542f6f4b754c6b956eee4e17bf0ed1f1476b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZTB92288482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176418e27c064db7834ec305ee3ab140c29ee547d2b6121aa7af0e3872ef578b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZTB92288484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1d1fd5f9afed77b07d5159240202617e6683bc4d7b19a6dd0b0133491e2a57. 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/DESK91893601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c506ad0ece45c733448322d7b73a547c72761989f1a50df8529782290909e7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DESK91893602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b63d6e2dba56928726001ffe876881342e716aba5c791966fbdff3e1a83123c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DESK91893603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f16c2feda19a39dc2058ca692b1e6d919fa8b776064d61de59fa530e4702994. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/DESK91893604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0896727001e89ba7ee15558016b0d728c8b153a782785a768fe756c48030b9f8. 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/DESK91893605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc052b50e54be7b32c1a9e82dae1683a66ca485647c23f92e112b4c5ade6cf9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DESK91893606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122377ff254ba218a4b52fcd1b899fbcb762aefd071aa7ea4faed2776ad86ba2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DESK91893607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd57a900ef3ef1b101b58ff7e8e6fbe30ad2b42f15379195ae26b139b9733c8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DESK91893608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b02e986814054bac89045c0593beb9bc2451cae1606eb71d34c2bc67c7e40f8. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DESK91893610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156515b9c8c0d0de7ccfba43a7e5e58dee44b3fcafff8cba8d6eac50b4b0ac28. 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/DESK91893611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2471b20a179e03a08b44de19b29aae26492d8f6479c5ed62980c860ad4962c4e. 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/DESK91893612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0319431ecab0fbd492daeaadb8a4648b56187a1b1ad211819c5cc6ca77cdac. 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/DESK91893614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6e596d38746df46c9d32b74a9dd5adcb2fb671b43804465e9c7be56f4db2d4. 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/DESK91893617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2568274d91927bd96c97c79f4e2a3759c4e70eb87d1406fe82631463652ab9. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DESK91893628.