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 0xce9321f915db9f6a36927444a54329e7042b186062a55c752a0329a39e4ab7a8. 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/f00348d8-5ce3-4b63-b7dd-b2a6578cb053.json and https://artists.proofprofile.net/proofs/artist/f00348d8-5ce3-4b63-b7dd-b2a6578cb053.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 0xc003db73b5fc0d80fe8f8f034f27e4c079f9c70ffbc1abb8d2f664cbd5e460e8. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/ZAO861700284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745f94048dd0f096ea7425b1ba9f80e754c99a8fd99e5b9cbfbfff951886b991. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZA0861900113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bb6b43b7021bd1c004ab9e09f074ccf07282f089cccd4f1326be5966c96647. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:49:08Z), 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/ZA0861900116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae7c5c66d3f9b162839c0bd39619c2323e4e38b84a92ecd4309bb6d8b8b0fda. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/ZA0861900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d237ea9e5d0b63695808a72c896669d4f19466c4f3df67d99416d9f39444a3. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:52:42Z), 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/ZAA011900242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104065862cc2a27b29ddbf9ef9bc90f5787775116e9a351c009b3f37a497ee24. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ZAO862000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03c581afeee63e0e8419fed63de91c07e78a09a9c3eb863a56fa1f487b7c881. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ZAO862000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4cb6a990a638237a7adff69851249e7e94599f50426fdad762e05c00a12deb. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/ZAO862000218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efc81dbcede76ed2da6b24fd84dc8ab330623fc15d8db72453ac27987562fd9. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/ZAO862100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacce38e152cd2a1c2f2ab3ddf6a1aecd1cd25707bc5b490e083f28b1296c1cfb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ZBGBH2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f1da01ff6e34f9f6810454230968e63536d55dc4d1fa4fe77afcce45182db4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ZBGBH2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a667d2be3874cf9a940f4a046072a66fbb87dfd4adf1de1376e2439de88e4f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZBGBH2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f1da01ff6e34f9f6810454230968e63536d55dc4d1fa4fe77afcce45182db4. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ZBGBH2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efc81dbcede76ed2da6b24fd84dc8ab330623fc15d8db72453ac27987562fd9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ZAO862100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ee735bf0ee7773a7886084577c3ba5164308e2cf9c47372f077021ac498384. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ZAO862100153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c67174c1904fb3540893096bde55c5f7a08f3a8b5d57ac467babd39ef068ec9. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:09:06Z), 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/ZBGBH2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb940b70996e53d91f0e917b1dd464501ac6d73f854808ae59d0d2c8ba2996e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ZBGBH2300032.