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 0x4abbb501b69572cb234361b10c486eaaa488316d8608cb988218e6265b62ba39. 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/9b62567f-fdb2-44aa-aa99-72e64d0b53a0.json and https://artists.proofprofile.net/proofs/artist/9b62567f-fdb2-44aa-aa99-72e64d0b53a0.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 0xb951cd9b8cda36eb0b4172e04046bccb3b964f85819d2d8ddd27665acf26d955. 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/HKG732228598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0a5680ce915ab4334f6c1c5f412b40f744ceed03da687f117cfe5bc20678af. 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/HKG732228599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5576b75d9520f5673a5c7da5d124cf48ac36549de9bd03c2f5e1e2af1ecfce53. 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/HKG732149320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315b3cdd782e09d48114aee25dd8150fd685dc3b1685732b3e5698ad15d89967. 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/HKG731894379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637b557538bc3e55f77b15fde0f760ba0029a27e1c0e64cf95e8a4802b9155cb. 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/FRX282461142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e3be670e0a9c1c83a930288ba744ff510b6e6e65699eaeda48e004edf7354c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRX282461143.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fdf14cec5db9b6dfe4abde351a53562ac1b2c878271ed0a72697ba37e6c3b4. 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/FR10S2429414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e291d05a0f3277abf1ff2d0fb153d6019bb832e0b456b7c14301766f5e3e0a. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/FR10S2429413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee486482d3e05f0ac4fddf4d19b5cd42d519c41a8e131a329556e34806e18c1b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/HKG732267557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c6fb0030b94568bbba5e806a66764c7101fbf8f8516d928854ffddb18718ae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG732267558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cd27a45e7fa70bd89463fb354f4999ba7e6b72f464c6b8cbc07b7e3ab6a895. 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/HKE672200292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0075b189a4ba64d7789907070b0a2a568d2e99c833a5f7db859c3f70febaa20a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/HKE672200293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fea350741fcda786f87b8fff31050d8aa0ff6b2104dfe837b513bf617bccdd3. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HKE672200294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18667758f590c1f222f35540a0f8b62a7e0bc3b63818cf658d0d7ea361b0c96. 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/HKG731766398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277f6fb42f544cd020fd015f4af1a3df5c5173b91116d2dfcd42f518c4b0d579. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/HKE672200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2f62a4cb817bc89dcfd9b17ea35c43db32f63045713d96cb580d16291ed23d. 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/HKG732157764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a9bd35fe5d8c295249620bd2c55c238f468222188207092a2f9597c6aae9bb. 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/HKG732107069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99592437ad27f719b3608f298d1bb5edaa1e22bc65458a1f6c9e35d04bb7500d. 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/HKG732115130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563e3f21245a2c2776742fa4a53946d60f1dfd29b83737d1187c555d2ac739eb. 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/HKG732102512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249dc5da618f605d3a36326e52bcbbac4a1421fa91d50d87c0ed40e5f3a157d3. 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/HKG732102513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5748ba52e6f8989ab73967a3a31e3136913a57ae8a9a2efd793985ad3bab7ed. 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/HKG732101998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7dd339fefa5bf8469393d7048110166481f0196dc7d59bb9d052f6a234f7cb. 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/HKG732101999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5170379b4b8d0287f283d87ab553b14225a1f8f23a1bac17e2c13939504f5c. 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/HKG732100141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d36ee0af157516947272b9301af5f04da2067d61a290136836c6cab0d1388ac. 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/HKG732100142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa8306338b6e3395b3b994bfcac5f081d696d5d3b8305e562d65985f8176627. 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/DGA0H2488137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31287f829c28cab4ba96edc5d7537c7cb0719d199dd9840a22778c4ac12f8060. 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/HKG732023687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32e1eb852d97ce7fcda318a3d182eb55de6c768735bb9f8036c967524fad2ec. 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/HKG731901794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b499c75077e7a625a62ee2f522b0d6bbc157df9debf8ad629f581eab4ccbcd3. 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/HKG731901812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a75a41368fb302fd874e0599dbef3bdf78a5e71beac07483c64d8c2b658300. 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/HKG731904617.