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 0x728d277f8bd00d6edc0ef7789f30ee127aa80847bcff5ad348ecebc8d4e695eb. 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/2b3ddfcd-dddd-4a8c-8d19-807fce129eaf.json and https://artists.proofprofile.net/proofs/artist/2b3ddfcd-dddd-4a8c-8d19-807fce129eaf.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 0x1ab77b9b28f8a1a1104492297cc6f8476459ef16f412a0edf9d1142f2a07ad43. 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/QZWFH2419607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a343d334c1bba8b8b2011c1d12a54989c7bea546fb724d74eecc7b59d20a610. 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/QZNWQ2449988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983e62656d95d97a1e9799a56ea0b46b10f9eb6749f33328c1e7d8a146a5055d. 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/QZK6K2432752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb11b265831f89cd8a599f6bcbfea104bfc97b56fad6ee642d79f079a672d109. 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/QZHN32491070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce58ee01b5087e2c0dbc48f120172fa73cc018f82101575c530f49391cd0bd6. 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/QZWFP2353103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351d4a7e476c69dd1bef74b48ea5dd1cf2d2fdb66b475aa194c2f78282edb713. 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/QZTB92302509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b42450431c9ae1ebc807486a93bd677231569434dffd86c6fcb51c7967af573. 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/QZTAT2384584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22797ffc5e41c10bf26e663a36663e993d5b6b36ddb5e24325a066fd35cc260. 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/QZNWT2386278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b0e40178e1367e9ad7bef6e37864fad8033127cf1e3972c55cad41b94ecb34. 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/QZMEM2363822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fad29dec24b9d2468860576ade971c1d11544c34b716fd6419b9124e37d9bc7. 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/QZK6J2336705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62dbb37e693f4dde9cf95a7c57cac9f55e061bd34765bbb314d9f6ebdf8a933. 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/QZHN82391700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424d58bba41b3b25b096195d8f45f6611b96b7d36094f9be524c1dd9c722b746. 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/QZFZ42377402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ca9e54d4ab786d8255eba8c31c596edec63eeeaee3834c451f3ddf468c0ccc. 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/QZTB72257205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf091bfeca8460a6b4c5c2b8c718d4f219e7121fbfb0bd0f8f41df917d428f2d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZMEQ2263791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b30eb7d4116705dfe883346042248bce68eac79a75dc799e9599c797a3733d. 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/QZNWR2241401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239ebac345fa50b1911ad22e31ff0dc1b7b0ab63c0915f0a75b36e9a22d92cd1. 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/QZK6M2281932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6eb257032e6da65a2ee2bef5e56b306ef17a0ee22be77588ec8a1f44e8d1f5f. 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/QZHN92292893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ced793813cdf97ad1638413e02c59ce27f7ea8535c780724c5f0a0f211074d9. 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/QZHN92291515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafed69fc99128542f39445470c39b4ae56811aa45fa73f4e2a3182b2e1e8a8cc. 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/QZHN42275709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf801408bdfa3d491a756a06f1a217fce4943f4c8f59f4215c632f4549b20c108. 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/QZES82294349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8a1c98f65f3383a18a011f6434f2f134dd974b3ccbbc0f30b082b44bad5347. 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/QZDA62234010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092ec684d0310412c1f02292e2eef7906338e9ee5b3c778bd9e4c3bef251be7e. 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/QZDA42211135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb445a2676dedd18d34fced2bb98aa5036a0b1635c4e3d15504f5d697f14ecf7c. 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/QZRP52192044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccf3b23bb838bb8eda953e4ea65861112df5994d3d766f286d2089a19edefc7. 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/QZPLR2134552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db92c55314408f08a7314577f3a0f895501551a5699118461b961e931746383. 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/QZWFW2407705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c941d7d2e3046371521bd9fa4f9f5e9ff4090c388eaf1f1f25aa2515c90d30. 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/QZWFP2409418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e79f12f1638307f93cb99a32d4158eeee7f97cc5fa4ae4c6718792ab05aa836. 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/QZWFT2475072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd2fd7a187f1c72135ef2fd7bc875f92decabce5c5f6072a84a460fb9bb5cc4. 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/QZWFJ2492638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab77b9b28f8a1a1104492297cc6f8476459ef16f412a0edf9d1142f2a07ad43. 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/QZWFH2419607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81087755d1ac0e5286004be46b4b34b49b197e577f6a8f5e3323055306246d8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFQ2461586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c941d7d2e3046371521bd9fa4f9f5e9ff4090c388eaf1f1f25aa2515c90d30. 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/QZWFP2409418.