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 0x7eefbd4f94fd21be1995e3da00f43b51442de9f1d70179b4366f1aa3320ef022. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78143352-a604-45f1-a8f2-260f318b1df1.json and https://artists.proofprofile.net/proofs/artist/78143352-a604-45f1-a8f2-260f318b1df1.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 0xc45746aebacbba473a62436093e8f680d8b087a39b6aeea2be8d4afd8507cfc8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCABQ1361735.
Piaf: Voz y Delirio (Original Cast Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc231c9f7eb88710051bdc70f527ad2cc451ee4e4aaa41d6cf621a4c2f0e898. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZC472000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17470edc49c5c70f3905a6f3476eab88f1c398b914e4e939fe06691499b2744. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX282337938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd3351232ea96fc98d0ec18154d8c8bbcffadaf1370d713fd4540a416033b94. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:51:34Z), 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/TCAFW2124643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10312c9baae629f2731de571667b3a9986a5a259d746b8eba5a822557530166. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:35:08Z), 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/FRX282337939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc60b2925c50fbb727ca09efcb49fa940ebdffbd8af662b1f037594f2f4825b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX282337940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0461ad343e6f4ca224bd6a7f27bb1b99a76d0bbc473d1f96320e5c5e7dce0d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX452486822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd04c6dcb82b991ca92eed29d7b4fde83606b5600a3807b630c02037a5cec5e. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/FRX452486823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd3351232ea96fc98d0ec18154d8c8bbcffadaf1370d713fd4540a416033b94. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAFW2124643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc60b2925c50fbb727ca09efcb49fa940ebdffbd8af662b1f037594f2f4825b. 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/FRX282337940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74949d8ea0f082f895aeb8ce00ee035bcd46f4318a22651a30ea5b9f40aeedf1. 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/FRX282337942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86497ea38eba6639cf71552062a84faee05bd7ab1d4a43bf21622cb687966c1d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:21:24Z), 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/FRX282512370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07124abb03ed08728a27eeb2e065a3396b555a51577c4207ebd27e2b26053366. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/FRX282512372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e347c07356178748173e7a621f0599158cc673513f01181cabc4b61492c089e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:48:15Z), 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/FRX282512373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280406ecc1923c430e33d2e121f29d0505974f03b251bcd9227955f85ce1368b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRX282512374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a008579454d9d93f5fc56bc66a301eb9c6bd1cc967c5ad5b9dfd14766d6449b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX282512376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b6fee41c89c09fa7116b083d794b2218284c47579ec953fddf4ca113980c35. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:04Z), 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/FRX282512377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d2bcb7074d97c5a20c158eb5d5fdaad12f5d92cf9a84281054e87b49c58c5b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/FRX282512378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142f202ff5f3957a276937c0f3e05b01969d03ee902ef80bce99ff32b4b36944. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/FRX282512379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419905743e3b42f045b98c8d0972128fc9ed5044752495a09c8d5b982ba9d971. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX282512380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ab6a01cc968b857b8a48f29355d614de76fa1c56f4bd644516f9118d4c2dec. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX282512381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3d96ae86896e507a79957044602a5a6dfbe2b1e5fbbfb7f3c101f2a500dfe2. 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/FRX282512382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f3f6610c8f0fabb2e267dfb5b7d71d418d897cbd77418391f978fe0b258412. 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/FRX282512383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5cc6a20084898ee2028665ca04d00012b9358c14f7e7ce206e6e1a8265f608. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX282512384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6917b7b68871b829f96b20fba1ba1b7f50487a48bad43647142756decc4b32a2. 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/FRX282512385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47756c4d701f7e6573fb26e2acff266626540ea9b178f3ddcfa00ff6169173cd. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FRX282512386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa20463d9ad1380ba17517dd286a82ac5395debe94195f8d8dc5d029286bef5a. 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/FRX282512387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256d4844d258f2de2b64cbfea7637be0615da9bcbc94d05fe84fa1e133c9bbff. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX282512388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf317ed6589b5670f84fba544e3b26cfec5d7f76c7c525db4257c98e943536618. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX282512389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa08fcdde570c9cb9bffedb85fa84bf68ccec75105d9fd644e293fdceeeb5390. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FRX282512391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a20081188a531ff39175dc38d3c2256adef4c609eefb806bd170c15e0835156. 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/TCADH1732919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc304771ee32ac7a947610e39b5f602be9d7384c63530a76fa261edb274a053d. 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/TCACT1653851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ff548ec548299ed762f602134bc055a48370ca67ef9701a976ccc2d9a1b147. 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/QZNWX2552320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b220b6665add8359fb26b98ee8e80e3ce610ea7018e97aa69a80e539a64691. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USHM81421908.
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 0x6586bd5d68d217fac2dba94edadb4b574c1f4c7fc57eebb4c10de4843f8435c3. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USHM81421912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4132a5788182fe4d398832d68e5dcbd946a4a3fcb7682dc3956753aba11d4925. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCACT1653896.