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 0x18e793d5970fa7b887c6c121dc02f34aa28d6b3e2eedd8f94cdc306153d2aca8. 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/8bdced46-22d3-4dc3-9a35-482e53ab0f90.json and https://artists.proofprofile.net/proofs/artist/8bdced46-22d3-4dc3-9a35-482e53ab0f90.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 0x69f64715dda94eed63d86cbf3871667ec8eb877adfede2645ede04eaf010eea3. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZES62194648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bdec81b3d611c758c13b2546eca1a84ef3ca94cf231a53725feaed1e810147. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZNMY2167512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09ab62973be151a2a5fc44fb48f72ddf406356a6762831a57a00d9bdfaf53ac. 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/QZNWW2134832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a84fe6291b293c7e41a3cca62d3d1346ef033e5a977184d86d5537aa9170a11. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZNWW2130299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca4bbb3af0a4bc1c3703a6c122130347aa18ae640ec4799fa07de0f6405cfe0. 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/QZPLS2150067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a3e2d3e930da79ee0968bf7cfb5f65188151167a2516c8d1d451f6eb361703. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6L2201375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef850613aeb19982416819dae26e5e2f81db7e13534fcef0d571f5f2d6dae905. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAZ2242141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7252ce6a1666c11ad61f096913617e973638b41ba46d44dd7f1da6580db50000. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZZ762408951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c0658279214c3c6349a77719a48705a6f6dce1d197d322a41f59b1b2d3745d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:38:21Z), 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/QZZ762408955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86e992b8bd434fb652a1b2b6a404f1175dce4ec8365a1770aecab55ace8d505. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZZ762408948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c138af57e0bc2c2484f084e4ec6fb6979ff05c312b56704ff1d05efdae95292. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:17Z), 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/QZMZ92561046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461b4878daec72c4cc2cdcfddcc5e753eae1c1ae6eb22d235206255b271baee0. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZMZ92561045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8848d76e9cf4987100378ea5cf96ee99d0e84cc7b4f75efc45c04679245d9922. 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/QZNJZ2510050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947da89c8fd236dd17fffa996b9da5b518fa41ca5e2fdfb75a353f93b099a267. 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/QZNJZ2510051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75712ce56de4dfda011e9af114a6102ae31fa5b1d530181407d4814f1c3d61b8. 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/QZNJZ2508696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3be80126205fae8acb3094d98d045eebb8d976804b0ef77388add182b6816f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:33:44Z), 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/QZTVM2520330.