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 0x99222fedf62e757fb8d250dcadc4aeca7258d55fe44515d838b95ca0e1874a42. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9412ad2-0a07-45f2-86ad-7808b37f9d99.json and https://artists.proofprofile.net/proofs/artist/a9412ad2-0a07-45f2-86ad-7808b37f9d99.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 0xa160e386e53c69c4fc312e15033790b2e0327728971a25cf88b7490e60e99638. 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/BXP0K2400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0eea77365c2373600c28e0dd844da75490e40e0b181f03f5e32d32ee44c5d5. 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/BXP0K2301246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b4b1f45152094dc5b65749c94222404edc7b40ef8776b46fef27a3b49d4395. 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/BXP0K2300377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9d4cb46563d578a6abb573b315c2d73cfd47c118f4d8f467cc9a43a0d3e003. 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/BXP0K2300491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c3a5ceb73904d0d27b0a1b905bfa8503a106fe7fded85706d1a2f5fa698561. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BXP0K2300851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690e4f1728338d0caa17bf0f92a6987c223a0dd898bb7dd454626e2710516435. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:37:23Z), 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/BXP0K2300504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99b26637ac5c317d968c50c5f6f520f0d2248d3d0a70f290d0c2765434289f8. 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/BXP0K2300467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bc7b42c66171a3c281ba192991ffa549298ae96d219238dcec8a9443abb3df. 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/QZNJZ2342260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd0531579aa8a97acfc0e05973d384a78d5e6e37fd9e7d235be84b8978c022a. 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/BXP0K2300525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73b6f798c45c6660e304d98250050fb6806c80d8ed48ead9ac56318049c0c31. 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/BXP0K2300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b063d746c31e0668eadbebca063de69bdba047cb1587dd5ca9768d27f1cfd9. 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/BXP0K2300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa518f25b54a29514c7416aaa289c7584cd0087621d3b8cce546d248e4f63d351. 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/BXKG22401483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30db5f225db220440dc2f4a7ef491096866c0ec5d01dbfb90346cda55f66384b. 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/BXP0K2500141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3615ddaf39a27209daafa1101dcf51878bc3aaebb0055e1112dffa3c16a322e0. 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/BXP0K2500212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089ddcf0032dd42fa683fb276396979e0880249cf4e1a91de2a0048375b74810. 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/BXP0K2401223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc192635ed9b2e8bc4605e9ba00c4c06d5091bfce42a394ef6171f663845dfef6. 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/BXP0K2500146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc059a29a12c98d16886353f3befb73e6a98597eef04ffd1eb2732e209fbbbc29. 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/BXP0K2401615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185ce86beb5357d43f963fcb5474c43057142261b4370fec3725d75c3880608c. 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/BXP0K2401617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8ee69ef92323317a0c770204ec8b4cab751dc0ca57820e2da1bc9def9f38bb. 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/BXP0K2401706.