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 0x9d98a239eb044ce2fe66ef854b0566bed58c8e1de95f79b6d3d8f5550ccc763a. 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/a1b7f46d-0c8e-4ec9-bb0b-c4735115ea36.json and https://artists.proofprofile.net/proofs/artist/a1b7f46d-0c8e-4ec9-bb0b-c4735115ea36.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 0x7ee9e76c07e8e9853fe71297ad862ae80539b88e72bb650e851fe5fb83890dfa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6L2434684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6233c878ea0c78383050b65069bff17547f2ff1eef00e5a26f788f4172aa2f8. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZK6J2475615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11723cb2234097923be9bdb55086cf039cdb325233fc8759c839e7a5e16fe821. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:46:25Z), 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/QZMEP2476700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ecf83c35741fbc20e71ac40d4c2c741f4f220b3ce3b9f9d48e183a7b8afdd8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFV2462206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f99f113846ee721c0ae6bfabe90492b2829677eeb381635c978635c367d2b47. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTBB2489877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee9e76c07e8e9853fe71297ad862ae80539b88e72bb650e851fe5fb83890dfa. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6L2434684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ecf83c35741fbc20e71ac40d4c2c741f4f220b3ce3b9f9d48e183a7b8afdd8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFV2462206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4047b774daa2374e610acb6bc95d0f5ee4cf3aa322107b62b3e7319c39394299. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7R2497539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b2a394771482718d4cf0e943f8db905246744c1c1eb6e6b3a85197147907d9. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZZ7R2497541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e5dc78817426e3d872c0d15f288ea01534fba62fe1abefd57c3d2ddbe4cabe. 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/QZTB22432700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dea6f4ec3973dcddd4eb9b86191dd7eabb673a3147c50360b51a41a8b5fdb1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6H2400892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5398a2cb7faf34fd7f14cc047bb8be8e5d07e602f820f22dc5445c129d6c4b54. 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/QZZ7R2497544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e15a1e2d9e7f884baa1ce017b738c9c49b70bec0c8a2b13c4d8c9cddfb4badc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWY2494064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8c581f029e80f6defdedb96fe5753490b480bd8db65c8d6fc54bd84e5a46e6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ7R2497548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d464d737336f33ef4bf3ef8310d439296471ef81be06e68b42f2dd2ca5a939e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNWR2542760.