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 0x21cb69f8773344708dd65993803f3b771ffbe5c9d78928293deaeb9757dc5ef7. 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/c631199a-7c4a-483c-897b-d6393f2d5966.json and https://artists.proofprofile.net/proofs/artist/c631199a-7c4a-483c-897b-d6393f2d5966.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 0xe3450c1811b2d38f8e3554d079124f1bd3bdc265485df428a5013bc01ed217c1. 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/QZNJY2012642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc635a7f8689d02e23421eb08b7ac55f0d9908471d13ef1269912b5605a64beb. 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/US7VG2140372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b7ab537cdfb88febc2c8928c21a0cb70c3550dcda20b87aabdd649fb29ad7c. 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/QZPYN2113316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99a325f27fe1206dc10cfacc87496ae88bc4b412ce6c6521289d3634aec599d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:07:11Z), 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/QZPYN2104994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419df135b47c644cb3b9bf5c19cc9041f81ba7f31647b8b81be44f553b327588. 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/QZPYN2100878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb4ee0f042c0d63c920db82a7c6e8ab21423c46d9ee2d28ed8470e5eef5d927. 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/JMA272014264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1fddf0bc3aaf5e45c4d77c90c9bdccedd8a21ece32f3495f1a2021001987e1. 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/JMA272012558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5ecb1559300bb4bb2d6e72c48f86d4da003c570e43e3c695b450774428ffb8. 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/JMA272011652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd555d677cbf3c43058dce54c933f6a39cfdb356123e71889650851e08464bc44. 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/JMA272010419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6d2505e81c13f4b38d4c9aa0d8abcb31eeceb93fd3ddd3826a45241c7d2c80. 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/JMA272008842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744be3ce21988ffa5baa2ee743e601ad6956f5d5a078597538caa9c5af1b91cd. 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/JMA272006171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bed4620264aebd83c59db8e39bb43ddc41e3bdb9f84b88257458707476205d. 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/JMA272004050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ebc8e7dcf533f650963e22713381aac14ca1d942a7c1aaa3d87e4d180caad5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JMA272004051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206157ef3f5bc8d66dd25a58616c80f69e7ea29e99e189974bec09ae0c1eaa98. 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/US7VG2218676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7c4a9228ec81fd4c9907a61984aa7222bba98cd45e47f4378b1c003d246834. 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/US7VG2218677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4afc2748826965412672a8d6995ce6b68eec9b5b264727cde151911d1e7cba. 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/QM4TX2406417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed62a101476a9f9d0250a594f1dfdcf8f8642fede9725e6cffb7315fd6cd0ba8. 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/JMA272009486.
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